June 2016 - LKP - Ml01.01.Org

[[DEBUG] force CONFIG_DEBUG_UACCESS] 4805ee99b0: BUG: tried to access memory at 0x9eaf48b while not in USER_DS

by kernel test robot

FYI, we noticed the following commit: https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/uaccess commit 4805ee99b0ac1282d09545e294e218a575208b72 ("[DEBUG] force CONFIG_DEBUG_UACCESS") on test machine: vm-lkp-wsx03-quantal-i386: 1 threads qemu-system-i386 -enable-kvm with 360M memory caused below changes: +----------------+------------+------------+ | | 19cca1fd38 | 4805ee99b0 | +----------------+------------+------------+ | boot_successes | 26 | 0 | +----------------+------------+------------+ [ 27.685036] Write protecting the kernel text: 7112k [ 27.695139] Write protecting the kernel read-only data: 2544k [ 27.722178] random: init urandom read with 1 bits of entropy available [ 27.795802] BUG: tried to access memory at 0x9eaf48b while not in USER_DS [ 27.806808] BUG: tried to access memory at 0x94a52ab while not in USER_DS [ 27.806837] ------------[ cut here ]------------ [ 27.806840] kernel BUG at arch/x86/mm/extable.c:189! [ 27.806843] invalid opcode: 0000 [#1] SMP [ 27.806847] Modules linked in: [ 27.806859] CPU: 0 PID: 131 Comm: sh Not tainted 4.7.0-rc2-00014-g4805ee9 #1 [ 27.806861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 27.806864] task: ccb1b480 ti: d625e000 task.ti: d625e000 [ 27.806874] EIP: 0060:[<c1045626>] EFLAGS: 00010292 CPU: 0 [ 27.806904] EIP is at bad_uaccess_kernel_ds+0x16/0x20 [ 27.806907] EAX: 0000003d EBX: 094a52a8 ECX: c10a20ae EDX: 00000001 [ 27.806908] ESI: 00000000 EDI: ccb1b480 EBP: d625ff24 ESP: d625ff1c [ 27.806910] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 [ 27.806912] CR0: 80050033 CR2: 094a5000 CR3: 1625a000 CR4: 00000690 [ 27.806918] Stack: [ 27.806926] c18acd14 094a52ab d625ff38 c1175ad6 00000000 d5e75c00 ccaeb000 d625ff74 [ 27.806932] c11774a0 00000002 00000000 00000000 c11771a6 d62492bc 00000000 d5e75c00 [ 27.806939] 094a52a8 d62c76c0 00000000 d625ffb4 d625e000 b771aff4 d625ff84 c11779eb [ 27.806940] Call Trace: [ 27.806964] [<c1175ad6>] count+0x36/0xc0 [ 27.806969] [<c11774a0>] do_execveat_common+0x3e0/0x6c0 [ 27.806974] [<c11771a6>] ? do_execveat_common+0xe6/0x6c0 [ 27.806978] [<c11779eb>] SyS_execve+0x2b/0x30 [ 27.806982] [<c10014bd>] do_int80_syscall_32+0x6d/0xc0 [ 27.807005] [<c16eff5a>] entry_INT80_32+0x2a/0x2a [ 27.807050] Code: 26 00 00 00 00 31 c0 5d c3 8d b6 00 00 00 00 8d bf 00 00 00 00 55 89 e5 83 ec 08 89 44 24 04 c7 04 24 14 cd 8a c1 e8 09 b4 0d 00 <0f> 0b 90 8d b4 26 00 00 00 00 55 89 e5 57 56 53 83 ec 0c 89 c3 [ 27.807057] EIP: [<c1045626>] bad_uaccess_kernel_ds+0x16/0x20 SS:ESP 0068:d625ff1c [ 27.807081] ---[ end trace ecc4b7edb5ca4295 ]--- [ 27.807084] Kernel panic - not syncing: Fatal exception FYI, raw QEMU command line is: qemu-system-i386 -enable-kvm -kernel /pkg/linux/i386-randconfig-r0-201623/gcc-6/4805ee99b0ac1282d09545e294e218a575208b72/vmlinuz-4.7.0-rc2-00014-g4805ee9 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-lkp-wsx03-quantal-i386-11/bisect_boot-1-quantal-core-i386.cgz-i386-randconfig-r0-201623-4805ee99b0ac1282d09545e294e218a575208b72-20160611-75443-cg68q1-1.yaml~ ARCH=i386 kconfig=i386-randconfig-r0-201623 branch=linux-devel/devel-catchup-201606110618 commit=4805ee99b0ac1282d09545e294e218a575208b72 BOOT_IMAGE=/pkg/linux/i386-randconfig-r0-201623/gcc-6/4805ee99b0ac1282d09545e294e218a575208b72/vmlinuz-4.7.0-rc2-00014-g4805ee9 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-lkp-wsx03-quantal-i386/quantal-core-i386.cgz/i386-randconfig-r0-201623/gcc-6/4805ee99b0ac1282d09545e294e218a575208b72/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-lkp-wsx03-quantal-i386-11::dhcp drbd.minor_count=8' -initrd /fs/sdc1/initrd-vm-lkp-wsx03-quantal-i386-11 -m 360 -smp 1 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-vm-lkp-wsx03-quantal-i386-11 -serial file:/dev/shm/kboot/serial-vm-lkp-wsx03-quantal-i386-11 -daemonize -display none -monitor null Thanks, Kernel Test Robot

4 years, 8 months

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[fs] 325bca518d: BUG kmalloc-4096 (Not tainted): Redzone overwritten

by kernel test robot

Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/uaccess commit 325bca518d477325102e898213c348ec620b0487 Author: Andy Lutomirski <luto(a)kernel.org> AuthorDate: Sun May 29 15:54:05 2016 -0700 Commit: Andy Lutomirski <luto(a)kernel.org> CommitDate: Fri Jun 10 15:11:15 2016 -0700 fs: Improve and simplify copy_mount_options copy_mount_options always tries to copy a full page even if the string is shorter than a page. If the string starts part-way into a page and ends on the same page it started on, this means that copy_mount_options can overrun the supplied buffer and read into the next page. If the buffer came from userspace (USER_DS), then this could be a performance issue (reading across the page boundary could block). If the buffer came from the kernel (KERNEL_DS), then this could read an unrelated page, and the kernel can have pages mapped in that have side-effects. I noticed this due to a new sanity-check I'm working on that tries to make sure that we don't try to access nonexistent pages under KERNEL_DS. This is the same issue that was fixed by commit eca6f534e619 ("fs: fix overflow in sys_mount() for in-kernel calls"), but for copy_mount_options instead of copy_mount_string. Signed-off-by: Andy Lutomirski <luto(a)kernel.org> +-----------------------------------------------------------+------------+------------+------------+ | | luto/20160 | 325bca518d | ed65a9b989 | +-----------------------------------------------------------+------------+------------+------------+ | boot_successes | 10 | 0 | 0 | | boot_failures | 88 | 32 | 49 | | IP-Config:Auto-configuration_of_network_failed | 2 | | | | Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode= | 86 | 14 | 12 | | BUG_kmalloc-#(Not_tainted):Redzone_overwritten | 0 | 32 | 49 | | INFO:#-#.First_byte#instead_of | 0 | 32 | 49 | | INFO:Allocated_in_copy_mount_options_age=#cpu=#pid= | 0 | 32 | 49 | | INFO:Freed_in__register_sysctl_paths_age=#cpu=#pid= | 0 | 32 | 49 | | INFO:Slab#objects=#used=#fp=#flags= | 0 | 32 | 49 | | INFO:Object#@offset=#fp= | 0 | 32 | 49 | | backtrace:kfree | 0 | 32 | 49 | | backtrace:SyS_mount | 0 | 32 | 49 | | backtrace:devtmpfsd | 0 | 32 | 49 | | BUG_kmalloc-#(Tainted:G_B):Redzone_overwritten | 0 | 23 | 33 | | INFO:Freed_in_kvfree_age=#cpu=#pid= | 0 | 23 | 33 | | backtrace:compat_SyS_mount | 0 | 4 | | | INFO:Allocated_in#age=#cpu=#pid= | 0 | 0 | 6 | | INFO:Object#@offset=#fp=0x(null) | 0 | 0 | 6 | | INFO:Allocated_in_do_select_age=#cpu=#pid= | 0 | 0 | 4 | | INFO:Freed_in_zs_cpu_notifier_age=#cpu=#pid= | 0 | 0 | 3 | | INFO:Slab#objects=#used=#fp=0x(null)flags= | 0 | 0 | 6 | | INFO:Freed_in_cryptomgr_probe_age=#cpu=#pid= | 0 | 0 | 2 | +-----------------------------------------------------------+------------+------------+------------+ [ 0.630144] x86: Booted up 1 node, 1 CPUs [ 0.631585] smpboot: Total of 1 processors activated (5852.65 BogoMIPS) [ 0.634530] ============================================================================= [ 0.637434] BUG kmalloc-4096 (Not tainted): Redzone overwritten [ 0.639287] ----------------------------------------------------------------------------- [ 0.639287] [ 0.643023] Disabling lock debugging due to kernel taint [ 0.644653] INFO: 0xffff88000ee5c3f8-0xffff88000ee5c3ff. First byte 0x0 instead of 0xcc [ 0.647383] INFO: Allocated in copy_mount_options+0x2e/0xa0 age=0 cpu=0 pid=11 [ 0.661654] INFO: Freed in __register_sysctl_paths+0x86/0x1b0 age=0 cpu=0 pid=1 [ 0.677123] INFO: Slab 0xffff88000f48c600 objects=7 used=5 fp=0xffff88000ee5c548 flags=0x280000004081 [ 0.680200] INFO: Object 0xffff88000ee5b3f8 @offset=13304 fp=0xffff88000ee5d600 [ 0.680200] [ 0.683759] Redzone ffff88000ee5b3f0: cc cc cc cc cc cc cc cc ........ [ 0.686558] Object ffff88000ee5b3f8: 6d 6f 64 65 00 30 37 35 35 00 00 00 00 00 00 00 mode.0755....... [ 0.689512] Object ffff88000ee5b408: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.692487] Object ffff88000ee5b418: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.695500] Object ffff88000ee5b428: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.698488] Object ffff88000ee5b438: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.701431] Object ffff88000ee5b448: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.704423] Object ffff88000ee5b458: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.707519] Object ffff88000ee5b468: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.710596] Object ffff88000ee5b478: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.713554] Object ffff88000ee5b488: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.716459] Object ffff88000ee5b498: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.719367] Object ffff88000ee5b4a8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.722338] Object ffff88000ee5b4b8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.725368] Object ffff88000ee5b4c8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.728363] Object ffff88000ee5b4d8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.731223] Object ffff88000ee5b4e8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.734443] Object ffff88000ee5b4f8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.737356] Object ffff88000ee5b508: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.740253] Object ffff88000ee5b518: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.743171] Object ffff88000ee5b528: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.746097] Object ffff88000ee5b538: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.749028] Object ffff88000ee5b548: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.751957] Object ffff88000ee5b558: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.754910] Object ffff88000ee5b568: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.757824] Object ffff88000ee5b578: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.760774] Object ffff88000ee5b588: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.763712] Object ffff88000ee5b598: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.766647] Object ffff88000ee5b5a8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.769562] Object ffff88000ee5b5b8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.772534] Object ffff88000ee5b5c8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.775435] Object ffff88000ee5b5d8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.778365] Object ffff88000ee5b5e8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.781304] Object ffff88000ee5b5f8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.784224] Object ffff88000ee5b608: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.787172] Object ffff88000ee5b618: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.790085] Object ffff88000ee5b628: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.793040] Object ffff88000ee5b638: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.812474] Object ffff88000ee5b648: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.815427] Object ffff88000ee5b658: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.818331] Object ffff88000ee5b668: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.821277] Object ffff88000ee5b678: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.824181] Object ffff88000ee5b688: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.827134] Object ffff88000ee5b698: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.830053] Object ffff88000ee5b6a8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.833046] Object ffff88000ee5b6b8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.835974] Object ffff88000ee5b6c8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.838931] Object ffff88000ee5b6d8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.841856] Object ffff88000ee5b6e8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.844815] Object ffff88000ee5b6f8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.847748] Object ffff88000ee5b708: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.850719] Object ffff88000ee5b718: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.853663] Object ffff88000ee5b728: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.856642] Object ffff88000ee5b738: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.859570] Object ffff88000ee5b748: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.862578] Object ffff88000ee5b758: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.865500] Object ffff88000ee5b768: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.868469] Object ffff88000ee5b778: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.871394] Object ffff88000ee5b788: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.874378] Object ffff88000ee5b798: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.877292] Object ffff88000ee5b7a8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.880273] Object ffff88000ee5b7b8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.883217] Object ffff88000ee5b7c8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.886174] Object ffff88000ee5b7d8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.889083] Object ffff88000ee5b7e8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.892045] Object ffff88000ee5b7f8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.894954] Object ffff88000ee5b808: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.897922] Object ffff88000ee5b818: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.900849] Object ffff88000ee5b828: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.903793] Object ffff88000ee5b838: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.906745] Object ffff88000ee5b848: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.909689] Object ffff88000ee5b858: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.912613] Object ffff88000ee5b868: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.915562] Object ffff88000ee5b878: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.918504] Object ffff88000ee5b888: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.921405] Object ffff88000ee5b898: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.924371] Object ffff88000ee5b8a8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.927658] Object ffff88000ee5b8b8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.930569] Object ffff88000ee5b8c8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.933672] Object ffff88000ee5b8d8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.936580] Object ffff88000ee5b8e8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.939485] Object ffff88000ee5b8f8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.942447] Object ffff88000ee5b908: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.945351] Object ffff88000ee5b918: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.948303] Object ffff88000ee5b928: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.951229] Object ffff88000ee5b938: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.964457] Object ffff88000ee5b948: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.967412] Object ffff88000ee5b958: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.970332] Object ffff88000ee5b968: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.975310] Object ffff88000ee5b978: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.978265] Object ffff88000ee5b988: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.984285] Object ffff88000ee5b998: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.987208] Object ffff88000ee5b9a8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.990161] Object ffff88000ee5b9b8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.993081] Object ffff88000ee5b9c8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.996055] Object ffff88000ee5b9d8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 0.998969] Object ffff88000ee5b9e8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.001884] Object ffff88000ee5b9f8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.004853] Object ffff88000ee5ba08: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.012819] Object ffff88000ee5ba18: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.015733] Object ffff88000ee5ba28: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.018696] Object ffff88000ee5ba38: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.021683] Object ffff88000ee5ba48: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.024686] Object ffff88000ee5ba58: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.027641] Object ffff88000ee5ba68: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.030551] Object ffff88000ee5ba78: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.033546] Object ffff88000ee5ba88: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.036609] Object ffff88000ee5ba98: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.039628] Object ffff88000ee5baa8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.042645] Object ffff88000ee5bab8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.045552] Object ffff88000ee5bac8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.048552] Object ffff88000ee5bad8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.051457] Object ffff88000ee5bae8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.054530] Object ffff88000ee5baf8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.057517] Object ffff88000ee5bb08: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.060483] Object ffff88000ee5bb18: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.063399] Object ffff88000ee5bb28: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.066360] Object ffff88000ee5bb38: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.069276] Object ffff88000ee5bb48: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.072252] Object ffff88000ee5bb58: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.075177] Object ffff88000ee5bb68: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.078092] Object ffff88000ee5bb78: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.081047] Object ffff88000ee5bb88: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.083998] Object ffff88000ee5bb98: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.086942] Object ffff88000ee5bba8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.089880] Object ffff88000ee5bbb8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.092818] Object ffff88000ee5bbc8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.095761] Object ffff88000ee5bbd8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.115502] Object ffff88000ee5bbe8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.118587] Object ffff88000ee5bbf8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.121620] Object ffff88000ee5bc08: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.124521] Object ffff88000ee5bc18: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.127379] Object ffff88000ee5bc28: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.130240] Object ffff88000ee5bc38: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.133272] Object ffff88000ee5bc48: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.136362] Object ffff88000ee5bc58: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.139329] Object ffff88000ee5bc68: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.142323] Object ffff88000ee5bc78: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.145394] Object ffff88000ee5bc88: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.148495] Object ffff88000ee5bc98: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.151524] Object ffff88000ee5bca8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.154467] Object ffff88000ee5bcb8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.157392] Object ffff88000ee5bcc8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.160332] Object ffff88000ee5bcd8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.163323] Object ffff88000ee5bce8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.166327] Object ffff88000ee5bcf8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.169334] Object ffff88000ee5bd08: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.177660] Object ffff88000ee5bd18: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.180688] Object ffff88000ee5bd28: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.183777] Object ffff88000ee5bd38: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.186842] Object ffff88000ee5bd48: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.189854] Object ffff88000ee5bd58: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.192883] Object ffff88000ee5bd68: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.195888] Object ffff88000ee5bd78: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.198898] Object ffff88000ee5bd88: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.201927] Object ffff88000ee5bd98: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.204941] Object ffff88000ee5bda8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.207945] Object ffff88000ee5bdb8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.210956] Object ffff88000ee5bdc8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.213980] Object ffff88000ee5bdd8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.217058] Object ffff88000ee5bde8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.220089] Object ffff88000ee5bdf8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.223118] Object ffff88000ee5be08: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.226121] Object ffff88000ee5be18: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.229136] Object ffff88000ee5be28: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.232192] Object ffff88000ee5be38: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.235210] Object ffff88000ee5be48: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.238220] Object ffff88000ee5be58: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.241243] Object ffff88000ee5be68: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.244268] Object ffff88000ee5be78: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.247288] Object ffff88000ee5be88: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.250298] Object ffff88000ee5be98: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.253315] Object ffff88000ee5bea8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.257725] Object ffff88000ee5beb8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.260737] Object ffff88000ee5bec8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.263757] Object ffff88000ee5bed8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.266764] Object ffff88000ee5bee8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.269773] Object ffff88000ee5bef8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.272792] Object ffff88000ee5bf08: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.275801] Object ffff88000ee5bf18: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.278812] Object ffff88000ee5bf28: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.281818] Object ffff88000ee5bf38: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.284806] Object ffff88000ee5bf48: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.287812] Object ffff88000ee5bf58: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.290865] Object ffff88000ee5bf68: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.293979] Object ffff88000ee5bf78: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.297098] Object ffff88000ee5bf88: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 1.302031] Object ffff88000ee5bf98: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ git bisect start ed65a9b989eebd576ad2bcfa7a46d9a502116449 af8c34ce6ae32addda3788d54a7e340cad22516b -- git bisect good b433186d4ebcbe9c85c595c56571a45a0e8b0a98 # 07:27 22+ 6 Merge 'linux-review/Benjamin-Coddington/pnfs-blocklayout-put-deviceid-node-after-releasing-bl_ext_lock/20160611-051226' into devel-catchup-201606110637 git bisect bad 74330a1d09ed3c8531cc7aef133de5c555867586 # 07:36 0- 20 Merge 'linux-review/Luis-R-Rodriguez/scripts-coccicheck-add-paramap-and-indexing-options/20160611-044623' into devel-catchup-201606110637 git bisect bad dc1500fc5d25e24bf0937627c7400f724a7ce7a5 # 07:41 0- 26 Merge 'luto/x86/uaccess' into devel-catchup-201606110637 git bisect good 6ca6e6e4f0bfd534e7586d953eebe77eae03b7de # 07:47 22+ 16 Merge 'linux-review/Heinrich-Schuchardt/selinuxfs-fix-type-mismatch/20160611-051623' into devel-catchup-201606110637 git bisect good 87b68ffea54a2ec788000bffd50a5624dee9c221 # 07:53 22+ 0 Merge 'linux-review/David-Howells/rxrpc-Limit-the-listening-backlog/20160611-053504' into devel-catchup-201606110637 git bisect bad 6a999f8f4d866c54982e5d8b0b8084f4ec8660fa # 07:58 0- 24 x86/uaccess: Give uaccess faults their own handler git bisect bad 325bca518d477325102e898213c348ec620b0487 # 08:05 0- 22 fs: Improve and simplify copy_mount_options git bisect good f89dec72e98b34b3be66bb1ef1be62974c0f8483 # 08:12 22+ 24 uvc_v4l2: Simplify compat ioctl implementation # first bad commit: [325bca518d477325102e898213c348ec620b0487] fs: Improve and simplify copy_mount_options git bisect good f89dec72e98b34b3be66bb1ef1be62974c0f8483 # 08:13 60+ 84 uvc_v4l2: Simplify compat ioctl implementation # extra tests with CONFIG_DEBUG_INFO_REDUCED git bisect bad 325bca518d477325102e898213c348ec620b0487 # 08:22 0- 4 fs: Improve and simplify copy_mount_options # extra tests on HEAD of linux-devel/devel-catchup-201606110637 git bisect bad ed65a9b989eebd576ad2bcfa7a46d9a502116449 # 08:23 0- 49 0day head guard for 'devel-catchup-201606110637' # extra tests on tree/branch luto/x86/uaccess git bisect bad 4805ee99b0ac1282d09545e294e218a575208b72 # 08:25 0- 8 [DEBUG] force CONFIG_DEBUG_UACCESS # extra tests on tree/branch linus/master git bisect good 3d0f0b6a5520878305589411b8d434fe088e4f21 # 08:36 63+ 39 Merge branch 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs # extra tests on tree/branch linux-next/master git bisect good 8f6027f7e808ed7c1fd8c8d37fc7a5076c683c4f # 08:39 66+ 45 Add linux-next specific files for 20160609 This script may reproduce the error. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=yocto-minimal-x86_64.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd kvm=( qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -kernel $kernel -initrd $initrd -m 256 -smp 1 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -serial stdio -display none -monitor null ) append=( hung_task_panic=1 earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw drbd.minor_count=8 ) "${kvm[@]}" --append "${append[*]}" ---------------------------------------------------------------------------- --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/lkp Intel Corporation

4 years, 8 months

1
0
0 / 0

[block] 5f1c7c9dad: BUG: unable to handle kernel NULL pointer dereference at 00000000000004f8

by kernel test robot

Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is git://git.infradead.org/users/hch/block.git req_op commit 5f1c7c9dade4024822e60db44f70fde6ebe92df7 Author: Christoph Hellwig <hch(a)lst.de> AuthorDate: Thu Jun 9 14:16:03 2016 +0200 Commit: Christoph Hellwig <hch(a)lst.de> CommitDate: Thu Jun 9 15:08:31 2016 +0200 block: replace req->cmd_type and the op type with req->op +--------------------------------------------------------------------------+------------+------------+------------+ | | c502e01d03 | 5f1c7c9dad | d1b3cde99d | +--------------------------------------------------------------------------+------------+------------+------------+ | boot_successes | 66 | 0 | 0 | | boot_failures | 0 | 23 | 13 | | BUG:unable_to_handle_kernel | 0 | 22 | 13 | | Oops | 0 | 23 | 13 | | RIP:blk_account_io_completion | 0 | 21 | 13 | | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 0 | 23 | 13 | | backtrace:do_sys_open | 0 | 3 | | | backtrace:SyS_open | 0 | 3 | | | WARNING:at_block/blk-exec.c:#blk_execute_rq_nowait | 0 | 13 | 12 | | backtrace:vfs_read | 0 | 18 | 12 | | backtrace:SyS_read | 0 | 18 | 12 | | backtrace:do_group_exit | 0 | 1 | | | backtrace:SyS_exit_group | 0 | 1 | | | backtrace:do_unlinkat | 0 | 1 | | | backtrace:SyS_unlink | 0 | 1 | | | backtrace:user_path_at_empty | 0 | 2 | 2 | | backtrace:SyS_readlinkat | 0 | 2 | 2 | | backtrace:SyS_readlink | 0 | 2 | 2 | | RIP:#:[<#>]s_bi[n</mfofdpfrofbef'f'ff813e2580>]blk_account_io_completion | 0 | 1 | | | backtrace:__sys_sendmsg | 0 | 1 | | | backtrace:SyS_sendmsg | 0 | 1 | | | backtrace:path_init | 0 | 1 | | | backtrace:sock_create | 0 | 0 | 1 | | backtrace:SyS_socket | 0 | 0 | 1 | | backtrace:do_munmap | 0 | 0 | 2 | | backtrace:SyS_munmap | 0 | 0 | 2 | | backtrace:vfs_stat | 0 | 0 | 2 | | backtrace:SyS_newstat | 0 | 0 | 2 | +--------------------------------------------------------------------------+------------+------------+------------+ udevd[259]: failed to execute '/sbin/modprobe' '/sbin/modprobe -bv acpi:LNXSYBUS:': No such file or directory udevd[261]: failed to execute '/sbin/modprobe' '/sbin/modprobe -bv acpi:LNXSYBUS:': No such file or directory udevd[262]: failed to execute '/sbin/modprobe' '/sbin/modprobe -bv ide:m-cdrom': No such file or directory [ 11.174434] BUG: unable to handle kernel NULL pointer dereference at 00000000000004f8 [ 11.175798] IP: [<ffffffff813e2580>] blk_account_io_completion+0x71/0xe8 [ 11.176910] PGD 0 [ 11.177219] ------------[ cut here ]------------ [ 11.177224] WARNING: CPU: 0 PID: 244 at block/blk-exec.c:58 blk_execute_rq_nowait+0x68/0x108 [ 11.177227] CPU: 0 PID: 244 Comm: udevd Tainted: G W 4.7.0-rc2-00069-g5f1c7c9 #8 [ 11.177228] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 11.177229] 0000000000000000 ffff88000a1d3b20 ffffffff813fa82f 0000000000000000 [ 11.177232] ffffffff8224f7da ffff88000a1d3b60 ffffffff810796d4 0000003a0a1d3c48 [ 11.177236] ffff880012040000 ffff880012020cf8 0000000000000002 0000000000000000 [ 11.177238] Call Trace: [ 11.177242] [<ffffffff813fa82f>] dump_stack+0x61/0x7e [ 11.177245] [<ffffffff810796d4>] __warn+0xb3/0xce [ 11.177247] [<ffffffff8107979c>] warn_slowpath_null+0x18/0x1a [ 11.177249] [<ffffffff813e7516>] blk_execute_rq_nowait+0x68/0x108 [ 11.177251] [<ffffffff813e748e>] ? blk_rq_map_kern+0x121/0x121 [ 11.177253] [<ffffffff813e7676>] blk_execute_rq+0xc0/0x108 [ 11.177257] [<ffffffff815b2dff>] virtblk_serial_show+0x8d/0xc9 [ 11.177259] [<ffffffff81593fe6>] dev_attr_show+0x20/0x44 [ 11.177261] [<ffffffff811b41d6>] sysfs_kf_seq_show+0x7a/0xca [ 11.177263] [<ffffffff811b2e1d>] kernfs_seq_show+0x21/0x23 [ 11.177265] [<ffffffff8117a41b>] seq_read+0x174/0x349 [ 11.177267] [<ffffffff811b35f4>] kernfs_fop_read+0x37/0x168 [ 11.177269] [<ffffffff8115b366>] __vfs_read+0x21/0xeb [ 11.177271] [<ffffffff81163dde>] ? putname+0x44/0x47 [ 11.177273] [<ffffffff81412857>] ? debug_check_no_obj_freed+0x12/0x14 [ 11.177276] [<ffffffff81148a8b>] ? kmem_cache_free+0x145/0x1c8 [ 11.177278] [<ffffffff8115b4d1>] vfs_read+0xa1/0x10f [ 11.177279] [<ffffffff8115b89a>] SyS_read+0x4c/0x89 [ 11.177282] [<ffffffff81d0e976>] entry_SYSCALL_64_fastpath+0x1e/0xad [ 11.177283] ---[ end trace d46d56a1b7009c59 ]--- git bisect start d1b3cde99d4434330e0e50159690c6f50e971d94 af8c34ce6ae32addda3788d54a7e340cad22516b -- git bisect bad 0e78022404e1ddcc4d03bd217449086033053dd2 # 02:44 2- 20 Merge 'linux-review/Kamal-Mostafa/Patch-MIPS-lib-Mark-intrinsics-notrace-has-been-added-to-the-4-2-y-ckt-tree/20160609-225100' into devel-catchup-201606092309 git bisect bad 2c7a96acf16691c07935a6acfeda4744538ecb53 # 02:50 0- 23 Merge 'linux-review/Kamal-Mostafa/Patch-MIPS-KVM-Fix-timer-IRQ-race-when-freezing-timer-has-been-added-to-the-4-2-y-ckt-tree/20160609-223834' into devel-catchup-201606092309 git bisect bad 108215e866d3cf602b0c268cb5549aef95dd1427 # 02:56 0- 6 Merge 'linux-review/Andrea-Merello/Add-DRM-driver-for-OpenCores-VGA-LCD-display/20160609-215802' into devel-catchup-201606092309 git bisect good 435a7a783cecc2a62cd70981c06bace98425d26c # 03:01 23+ 0 0day base guard for 'devel-catchup-201606092309' git bisect bad ffd803ea3cf8cf1d72a95d6ac42cea284ca54d46 # 03:06 0- 27 Merge 'hch-block/req_op' into devel-catchup-201606092309 git bisect good 8fe0d473f5477e9916d3ac581a226acfe83142be # 03:11 22+ 0 block: convert merge/insert code to check for REQ_OPs. git bisect good c45741d9e3f6ecb73c0dd7ead63abff2cc337c23 # 03:20 21+ 0 Merge branch 'for-4.8/core' into for-next git bisect good 7e6984260fa491dca086cf8a342488c4f93536fc # 03:33 23+ 0 Merge branch 'for-4.8/core' into for-next git bisect good 8cc62b37f584445556c8743d2e56dd4863c02f4d # 03:44 23+ 0 mg_disk: fix enum REQ_OP_ kbuild error git bisect good c502e01d03fbc71e9cf2654c6ed61f2d75a68db8 # 03:54 23+ 0 block: add a separate operation type for secure erase git bisect bad 5f1c7c9dade4024822e60db44f70fde6ebe92df7 # 03:56 1- 21 block: replace req->cmd_type and the op type with req->op # first bad commit: [5f1c7c9dade4024822e60db44f70fde6ebe92df7] block: replace req->cmd_type and the op type with req->op git bisect good c502e01d03fbc71e9cf2654c6ed61f2d75a68db8 # 03:59 66+ 0 block: add a separate operation type for secure erase # extra tests on HEAD of linux-devel/devel-catchup-201606092309 git bisect bad d1b3cde99d4434330e0e50159690c6f50e971d94 # 03:59 0- 13 0day head guard for 'devel-catchup-201606092309' # extra tests on tree/branch hch-block/req_op git bisect bad 5f1c7c9dade4024822e60db44f70fde6ebe92df7 # 04:01 0- 23 block: replace req->cmd_type and the op type with req->op # extra tests with first bad commit reverted git bisect good d26046e3f0b5878bd143ddffa2336d84dfa310ed # 04:38 69+ 0 Revert "block: replace req->cmd_type and the op type with req->op" # extra tests on tree/branch linus/master git bisect good c8ae067f2635be0f8c7e5db1bb74b757d623e05b # 04:45 68+ 0 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs # extra tests on tree/branch linux-next/master git bisect good 8f6027f7e808ed7c1fd8c8d37fc7a5076c683c4f # 05:10 69+ 0 Add linux-next specific files for 20160609 This script may reproduce the error. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=quantal-core-x86_64.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd kvm=( qemu-system-x86_64 -enable-kvm -cpu kvm64 -kernel $kernel -initrd $initrd -m 300 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -serial stdio -display none -monitor null ) append=( hung_task_panic=1 earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw drbd.minor_count=8 ) "${kvm[@]}" --append "${append[*]}" ---------------------------------------------------------------------------- --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/lkp Intel Corporation

4 years, 8 months

1
0
0 / 0

[TTY] 7411df6b66: WARNING: CPU: 0 PID: 1 at drivers/tty/serial/serial_core.c:98 uart_install+0xd4/0xe0

by kernel test robot

FYI, we noticed the following commit: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel commit 7411df6b66594f6eaeac23fe0174aad4aa71d6f9 ("TTY: serial_core, add ->install") on test machine: vm-vp-quantal-x86_64: 2 threads qemu-system-x86_64 -enable-kvm with 360M memory caused below changes: +----------------+------------+------------+ | | 16b6770edb | 7411df6b66 | +----------------+------------+------------+ | boot_successes | 0 | 0 | +----------------+------------+------------+ WARNING: 'debug_locks && !lock_is_held(&(&state->port.mutex)->dep_map)' is true! ------------[ cut here ]------------ ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at drivers/tty/serial/serial_core.c:98 uart_install+0xd4/0xe0 WARNING: CPU: 0 PID: 1 at drivers/tty/serial/serial_core.c:98 uart_install+0xd4/0xe0 CPU: 0 PID: 1 Comm: swapper Not tainted 4.7.0-rc2-next-20160609-00023-g7411df6 #1 CPU: 0 PID: 1 Comm: swapper Not tainted 4.7.0-rc2-next-20160609-00023-g7411df6 #1 power_supply test_battery: uevent FYI, raw QEMU command line is: qemu-system-x86_64 -enable-kvm -kernel /pkg/linux/x86_64-randconfig-s1-06091829/gcc-6/7411df6b66594f6eaeac23fe0174aad4aa71d6f9/vmlinuz-4.7.0-rc2-next-20160609-00023-g7411df6 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-vp-quantal-x86_64-49/bisect_boot-1-quantal-core-x86_64.cgz-x86_64-randconfig-s1-06091829-7411df6b66594f6eaeac23fe0174aad4aa71d6f9-20160610-12341-j3nm4r-0.yaml~ ARCH=x86_64 kconfig=x86_64-randconfig-s1-06091829 branch=linux-devel/devel-catchup-201606092006 commit=7411df6b66594f6eaeac23fe0174aad4aa71d6f9 BOOT_IMAGE=/pkg/linux/x86_64-randconfig-s1-06091829/gcc-6/7411df6b66594f6eaeac23fe0174aad4aa71d6f9/vmlinuz-4.7.0-rc2-next-20160609-00023-g7411df6 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-vp-quantal-x86_64/quantal-core-x86_64.cgz/x86_64-randconfig-s1-06091829/gcc-6/7411df6b66594f6eaeac23fe0174aad4aa71d6f9/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-vp-quantal-x86_64-49::dhcp drbd.minor_count=8' -initrd /fs/sdf1/initrd-vm-vp-quantal-x86_64-49 -m 360 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-vm-vp-quantal-x86_64-49 -serial file:/dev/shm/kboot/serial-vm-vp-quantal-x86_64-49 -daemonize -display none -monitor null Thanks, Kernel Test Robot

4 years, 8 months

1
0
0 / 0

Extending the 0-day system with syzkaller?

by David Drysdale

Hi Fengguang / LKP-folk, Quick question -- how easy is it to add extra builds/tests/checks to your marvellous 0-day kbuild system? The reason I ask is that I've recently been exploring syzkaller [1], which is a system call fuzzer written by some of my colleagues here at Google (cc'ed). Although it's fairly new, it has uncovered a bunch of kernel bugs already [2] so I wondered if it might be a good candidate for inclusion in the 0-day checks at some point. (As an aside, I'm in the process of writing an article about syzkaller for LWN, which might also expose it to more folk.) What do you think? Thanks, David [1] https://github.com/google/syzkaller [2] https://github.com/google/syzkaller/wiki/Found-Bugs

4 years, 8 months

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[lkp] [locking/rwsem] 133e89ef5e: +12.6% improvement of vm-scalability.throughput

by kernel test robot

FYI, we noticed a +12.6% improvement of vm-scalability.throughput due to commit: commit 133e89ef5ef338e1358b16246521ba17d935c396 ("locking/rwsem: Enable lockless waiter wakeup(s)") https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking/core in testcase: vm-scalability on test machine: lkp-bdw-ex2: 160 threads Broadwell-EX with 512G memory with following parameters: cpufreq_governor=performance/runtime=300s/test=small-allocs-mt Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong

4 years, 8 months

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[lkp] [locking/rwsem] e24d283289: vm-scalability.throughput -48.0% regression

by kernel test robot

FYI, we noticed vm-scalability.throughput -48.0% regression due to commit: commit e24d283289a6a4cef9caceec31d389dfeeb21b48 ("locking/rwsem: Add reader-owned state to the owner field") https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/atomic in testcase: vm-scalability on test machine: lkp-hsx04: 144 threads Brickland Haswell-EX with 512G memory with following parameters: cpufreq_governor=performance/runtime=300s/test=small-allocs Details are as below: --------------------------------------------------------------------------------------------------> ========================================================================================= compiler/cpufreq_governor/kconfig/rootfs/runtime/tbox_group/test/testcase: gcc-4.9/performance/x86_64-rhel/debian-x86_64-2015-02-07.cgz/300s/lkp-hsx04/small-allocs/vm-scalability commit: c37dd24e4c7ab010715a56b39c4c21302c96e8d7 e24d283289a6a4cef9caceec31d389dfeeb21b48 c37dd24e4c7ab010 e24d283289a6a4cef9caceec31 ---------------- -------------------------- fail:runs %reproduction fail:runs | | | :4 25% 1:4 kmsg.Spurious_LAPIC_timer_interrupt_on_cpu %stddev %change %stddev \ | \ 24139001 ± 0% -48.0% 12555858 ± 0% vm-scalability.throughput 299.32 ± 2% +29.7% 388.19 ± 0% vm-scalability.time.elapsed_time 299.32 ± 2% +29.7% 388.19 ± 0% vm-scalability.time.elapsed_time.max 6298 ± 4% +1999.6% 132237 ± 1% vm-scalability.time.involuntary_context_switches 1.074e+09 ± 0% -21.9% 8.391e+08 ± 0% vm-scalability.time.minor_page_faults 915.50 ± 1% +546.1% 5915 ± 0% vm-scalability.time.percent_of_cpu_this_job_got 1532 ± 2% +1339.2% 22061 ± 1% vm-scalability.time.system_time 1207 ± 0% -25.1% 903.83 ± 0% vm-scalability.time.user_time 55730114 ± 3% -72.4% 15365125 ± 3% vm-scalability.time.voluntary_context_switches 354.90 ± 2% +24.2% 440.93 ± 0% uptime.boot 47743 ± 2% -16.8% 39734 ± 1% uptime.idle 11033 ± 3% +16.6% 12866 ± 5% softirqs.NET_RX 465644 ± 8% +77.0% 824221 ± 4% softirqs.RCU 822386 ± 3% -34.4% 539306 ± 3% softirqs.SCHED 2832016 ± 3% +362.3% 13091690 ± 1% softirqs.TIMER 13892334 ± 1% -23.8% 10580102 ± 0% vmstat.memory.cache 8.25 ± 5% +624.2% 59.75 ± 5% vmstat.procs.r 371331 ± 1% -78.1% 81249 ± 3% vmstat.system.cs 14807 ± 2% +404.7% 74724 ± 0% vmstat.system.in 2340 ± 0% +10.0% 2574 ± 0% slabinfo.task_struct.active_objs 2373 ± 0% +10.0% 2611 ± 0% slabinfo.task_struct.num_objs 70183069 ± 1% -27.0% 51225575 ± 0% slabinfo.vm_area_struct.active_objs 1612599 ± 1% -27.8% 1164410 ± 0% slabinfo.vm_area_struct.active_slabs 70954363 ± 1% -27.8% 51234087 ± 0% slabinfo.vm_area_struct.num_objs 1612599 ± 1% -27.8% 1164410 ± 0% slabinfo.vm_area_struct.num_slabs 3.236e+09 ± 3% +103.1% 6.571e+09 ± 4% cpuidle.C1-HSW.time 52299979 ± 5% -85.0% 7820785 ± 2% cpuidle.C1-HSW.usage 1.494e+08 ± 5% +262.2% 5.412e+08 ± 1% cpuidle.C1E-HSW.time 50766 ± 27% +2917.0% 1531626 ± 4% cpuidle.C1E-HSW.usage 56165957 ± 28% +354.5% 2.553e+08 ± 4% cpuidle.C3-HSW.time 3.61e+10 ± 2% -31.1% 2.486e+10 ± 1% cpuidle.C6-HSW.time 2950756 ± 12% +98.9% 5870384 ± 5% cpuidle.C6-HSW.usage 3.25 ±173% +1e+06% 33965 ± 8% latency_stats.hits.call_rwsem_down_write_failed.vma_link.mmap_region.do_mmap.vm_mmap_pgoff.SyS_mmap_pgoff.SyS_mmap.do_syscall_64.return_from_SYSCALL_64 2106 ±173% +22894.8% 484444 ± 6% latency_stats.max.call_rwsem_down_write_failed.vma_link.mmap_region.do_mmap.vm_mmap_pgoff.SyS_mmap_pgoff.SyS_mmap.do_syscall_64.return_from_SYSCALL_64 16006 ± 16% +3278.4% 540764 ± 5% latency_stats.max.call_rwsem_down_write_failed.vma_link.mmap_region.do_mmap.vm_mmap_pgoff.SyS_mmap_pgoff.SyS_mmap.entry_SYSCALL_64_fastpath 0.00 ± -1% +Inf% 10171 ± 46% latency_stats.max.stop_two_cpus.migrate_swap.task_numa_migrate.numa_migrate_preferred.task_numa_fault.handle_pte_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault 2110 ±173% +2.6e+06% 54674725 ± 5% latency_stats.sum.call_rwsem_down_write_failed.vma_link.mmap_region.do_mmap.vm_mmap_pgoff.SyS_mmap_pgoff.SyS_mmap.do_syscall_64.return_from_SYSCALL_64 0.00 ± -1% +Inf% 25016 ± 62% latency_stats.sum.stop_two_cpus.migrate_swap.task_numa_migrate.numa_migrate_preferred.task_numa_fault.handle_pte_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault 0.00 ± -1% +Inf% 180087 ± 88% latency_stats.sum.wait_on_page_bit.__migration_entry_wait.migration_entry_wait.handle_pte_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault 532977 ± 27% +118.0% 1162030 ± 3% numa-numastat.node0.local_node 532977 ± 27% +118.0% 1162030 ± 3% numa-numastat.node0.numa_hit 3764421 ± 7% -68.4% 1188656 ± 3% numa-numastat.node1.local_node 3764421 ± 7% -68.4% 1188656 ± 3% numa-numastat.node1.numa_hit 520550 ± 52% +120.9% 1149813 ± 6% numa-numastat.node2.local_node 520550 ± 52% +120.9% 1149813 ± 6% numa-numastat.node2.numa_hit 515312 ± 31% +119.8% 1132865 ± 3% numa-numastat.node3.local_node 515312 ± 31% +119.8% 1132865 ± 3% numa-numastat.node3.numa_hit 299.32 ± 2% +29.7% 388.19 ± 0% time.elapsed_time 299.32 ± 2% +29.7% 388.19 ± 0% time.elapsed_time.max 6298 ± 4% +1999.6% 132237 ± 1% time.involuntary_context_switches 1.074e+09 ± 0% -21.9% 8.391e+08 ± 0% time.minor_page_faults 915.50 ± 1% +546.1% 5915 ± 0% time.percent_of_cpu_this_job_got 1532 ± 2% +1339.2% 22061 ± 1% time.system_time 1207 ± 0% -25.1% 903.83 ± 0% time.user_time 55730114 ± 3% -72.4% 15365125 ± 3% time.voluntary_context_switches 86101 ± 2% +298.5% 343071 ± 0% meminfo.Active 71618 ± 2% +358.7% 328527 ± 0% meminfo.Active(anon) 792738 ± 0% +33.1% 1055133 ± 0% meminfo.Cached 535375 ± 13% +55.8% 834329 ± 4% meminfo.Committed_AS 18980 ± 1% +25.7% 23852 ± 0% meminfo.Mapped 5481932 ± 1% -27.1% 3996491 ± 0% meminfo.PageTables 13082002 ± 1% -27.6% 9476457 ± 0% meminfo.SUnreclaim 305087 ± 0% +86.0% 567502 ± 0% meminfo.Shmem 13153870 ± 1% -27.4% 9549827 ± 0% meminfo.Slab 6.36 ± 1% +546.4% 41.10 ± 1% turbostat.%Busy 183.50 ± 1% +548.0% 1189 ± 0% turbostat.Avg_MHz 21.78 ± 2% +116.4% 47.13 ± 0% turbostat.CPU%c1 0.12 ± 19% +239.6% 0.41 ± 11% turbostat.CPU%c3 71.74 ± 0% -84.2% 11.37 ± 4% turbostat.CPU%c6 41.75 ± 2% +25.1% 52.25 ± 3% turbostat.CoreTmp 47.18 ± 3% -96.8% 1.51 ± 39% turbostat.Pkg%pc2 45.75 ± 4% +20.2% 55.00 ± 4% turbostat.PkgTmp 256.81 ± 0% +76.3% 452.63 ± 0% turbostat.PkgWatt 221.02 ± 2% +10.9% 245.12 ± 0% turbostat.RAMWatt 789.50 ± 2% +106.9% 1633 ± 33% numa-vmstat.node0.nr_mapped 97513 ± 55% +166.2% 259578 ± 1% numa-vmstat.node0.nr_page_table_pages 240535 ± 52% +155.9% 615613 ± 1% numa-vmstat.node0.nr_slab_unreclaimable 496249 ± 25% +72.5% 856005 ± 4% numa-vmstat.node0.numa_hit 496249 ± 25% +72.5% 856005 ± 4% numa-vmstat.node0.numa_local 1085904 ± 6% -80.7% 209372 ± 0% numa-vmstat.node1.nr_page_table_pages 2571159 ± 6% -80.6% 498282 ± 0% numa-vmstat.node1.nr_slab_unreclaimable 2616970 ± 6% -67.3% 856044 ± 4% numa-vmstat.node1.numa_hit 2616969 ± 6% -67.3% 856043 ± 4% numa-vmstat.node1.numa_local 772.50 ± 0% +46.7% 1133 ± 18% numa-vmstat.node2.nr_mapped 85446 ± 57% +213.0% 267414 ± 1% numa-vmstat.node3.nr_page_table_pages 210910 ± 54% +200.5% 633780 ± 1% numa-vmstat.node3.nr_slab_unreclaimable 383969 ± 29% +91.9% 736890 ± 5% numa-vmstat.node3.numa_hit 383968 ± 29% +91.9% 736890 ± 5% numa-vmstat.node3.numa_local 3160 ± 2% +99.2% 6296 ± 36% numa-meminfo.node0.Mapped 2010620 ± 37% +112.0% 4263497 ± 3% numa-meminfo.node0.MemUsed 390044 ± 55% +166.2% 1038368 ± 1% numa-meminfo.node0.PageTables 962114 ± 52% +155.9% 2462482 ± 1% numa-meminfo.node0.SUnreclaim 978361 ± 52% +153.7% 2482081 ± 1% numa-meminfo.node0.Slab 15136220 ± 6% -78.1% 3311792 ± 3% numa-meminfo.node1.MemUsed 4343393 ± 6% -80.7% 837538 ± 0% numa-meminfo.node1.PageTables 10283945 ± 6% -80.6% 1993155 ± 0% numa-meminfo.node1.SUnreclaim 10305199 ± 6% -80.5% 2010656 ± 0% numa-meminfo.node1.Slab 3092 ± 0% +45.9% 4510 ± 19% numa-meminfo.node2.Mapped 1900064 ± 73% +118.1% 4143155 ± 5% numa-meminfo.node2.MemUsed 1712999 ± 38% +138.4% 4083839 ± 2% numa-meminfo.node3.MemUsed 341760 ± 57% +213.0% 1069692 ± 1% numa-meminfo.node3.PageTables 843596 ± 54% +200.5% 2535176 ± 1% numa-meminfo.node3.SUnreclaim 861861 ± 53% +196.3% 2553465 ± 1% numa-meminfo.node3.Slab 17897 ± 2% +358.9% 82133 ± 0% proc-vmstat.nr_active_anon 198273 ± 0% +33.1% 263885 ± 0% proc-vmstat.nr_file_pages 4744 ± 1% +25.7% 5966 ± 0% proc-vmstat.nr_mapped 1370309 ± 1% -27.1% 999157 ± 0% proc-vmstat.nr_page_table_pages 76247 ± 0% +86.1% 141863 ± 0% proc-vmstat.nr_shmem 3270282 ± 1% -27.6% 2369169 ± 0% proc-vmstat.nr_slab_unreclaimable 3768 ± 19% +438.8% 20303 ± 0% proc-vmstat.numa_hint_faults 1556 ± 19% +482.9% 9069 ± 3% proc-vmstat.numa_hint_faults_local 5326780 ± 0% -13.2% 4625815 ± 0% proc-vmstat.numa_hit 5326780 ± 0% -13.2% 4625814 ± 0% proc-vmstat.numa_local 999.50 ± 9% +73.4% 1733 ± 3% proc-vmstat.numa_pages_migrated 5252 ± 11% +308.7% 21467 ± 1% proc-vmstat.numa_pte_updates 14562 ± 0% +334.9% 63332 ± 0% proc-vmstat.pgactivate 10094 ± 30% +200.3% 30314 ± 3% proc-vmstat.pgalloc_dma32 7826803 ± 0% -15.9% 6584736 ± 0% proc-vmstat.pgalloc_normal 1.075e+09 ± 0% -21.8% 8.402e+08 ± 0% proc-vmstat.pgfault 6848954 ± 4% -12.1% 6017910 ± 5% proc-vmstat.pgfree 999.50 ± 9% +73.4% 1733 ± 3% proc-vmstat.pgmigrate_success 5.55 ± 2% -100.0% 0.00 ± -1% perf-profile.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.activate_task.ttwu_do_activate 10.99 ± 2% -93.2% 0.74 ± 2% perf-profile.__do_page_fault.do_page_fault.page_fault 0.98 ± 4% -100.0% 0.00 ± -1% perf-profile.__fget.fget.sys_mmap_pgoff.sys_mmap.entry_SYSCALL_64_fastpath 2.49 ± 3% -100.0% 0.00 ± -1% perf-profile.__kernel_text_address.print_context_stack.dump_trace.save_stack_trace_tsk.__account_scheduler_latency 1.41 ± 4% -100.0% 0.00 ± -1% perf-profile.__schedule.schedule.rwsem_down_write_failed.call_rwsem_down_write_failed.down_write 1.08 ± 4% -100.0% 0.00 ± -1% perf-profile.__schedule.schedule.schedule_preempt_disabled.cpu_startup_entry.start_secondary 4.02 ± 3% -100.0% 0.00 ± -1% perf-profile.__vma_link_rb.vma_link.mmap_region.do_mmap.vm_mmap_pgoff 5.06 ± 1% -100.0% 0.00 ± -1% perf-profile._raw_spin_lock_irqsave.try_to_wake_up.wake_up_q.rwsem_wake.call_rwsem_wake 6.61 ± 2% -100.0% 0.00 ± -1% perf-profile.activate_task.ttwu_do_activate.try_to_wake_up.wake_up_q.rwsem_wake 3.50 ± 3% -100.0% 0.00 ± -1% perf-profile.arch_get_unmapped_area_topdown.get_unmapped_area.do_mmap.vm_mmap_pgoff.sys_mmap_pgoff 3.72 ± 9% -70.7% 1.09 ± 3% perf-profile.call_cpuidle.cpu_startup_entry.start_secondary 21.76 ± 1% +330.8% 93.75 ± 0% perf-profile.call_rwsem_down_write_failed.down_write.vma_link.mmap_region.do_mmap 15.52 ± 1% -95.5% 0.70 ± 1% perf-profile.call_rwsem_wake.up_write.vma_link.mmap_region.do_mmap 8.42 ± 2% -85.2% 1.25 ± 3% perf-profile.cpu_startup_entry.start_secondary 3.67 ± 10% -70.3% 1.09 ± 3% perf-profile.cpuidle_enter.call_cpuidle.cpu_startup_entry.start_secondary 3.64 ± 10% -70.7% 1.07 ± 3% perf-profile.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry.start_secondary 63.02 ± 1% +53.5% 96.71 ± 0% perf-profile.do_mmap.vm_mmap_pgoff.sys_mmap_pgoff.sys_mmap.entry_SYSCALL_64_fastpath 11.46 ± 2% -93.2% 0.78 ± 2% perf-profile.do_page_fault.page_fault 22.30 ± 1% +320.8% 93.83 ± 0% perf-profile.down_write.vma_link.mmap_region.do_mmap.vm_mmap_pgoff 5.04 ± 2% -100.0% 0.00 ± -1% perf-profile.dump_trace.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair 6.34 ± 2% -100.0% 0.00 ± -1% perf-profile.enqueue_entity.enqueue_task_fair.activate_task.ttwu_do_activate.try_to_wake_up 6.44 ± 2% -100.0% 0.00 ± -1% perf-profile.enqueue_task_fair.activate_task.ttwu_do_activate.try_to_wake_up.wake_up_q 66.17 ± 0% +46.9% 97.23 ± 0% perf-profile.entry_SYSCALL_64_fastpath 0.98 ± 5% -100.0% 0.00 ± -1% perf-profile.fget.sys_mmap_pgoff.sys_mmap.entry_SYSCALL_64_fastpath 1.75 ± 3% -100.0% 0.00 ± -1% perf-profile.find_vma.__do_page_fault.do_page_fault.page_fault 3.70 ± 3% -100.0% 0.00 ± -1% perf-profile.get_unmapped_area.do_mmap.vm_mmap_pgoff.sys_mmap_pgoff.sys_mmap 3.76 ± 3% -100.0% 0.00 ± -1% perf-profile.handle_mm_fault.__do_page_fault.do_page_fault.page_fault 1.05 ± 2% -100.0% 0.00 ± -1% perf-profile.handle_pte_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault 3.55 ± 10% -70.1% 1.06 ± 3% perf-profile.intel_idle.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry 58.78 ± 1% +64.2% 96.49 ± 0% perf-profile.mmap_region.do_mmap.vm_mmap_pgoff.sys_mmap_pgoff.sys_mmap 9.24 ± 2% -97.3% 0.25 ±100% perf-profile.native_irq_return_iret 4.66 ± 2% -100.0% 0.00 ± -1% perf-profile.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.try_to_wake_up.wake_up_q.rwsem_wake 8.78 ± 0% +945.7% 91.81 ± 0% perf-profile.osq_lock.rwsem_down_write_failed.call_rwsem_down_write_failed.down_write.vma_link 11.64 ± 2% -93.3% 0.78 ± 2% perf-profile.page_fault 3.44 ± 4% -100.0% 0.00 ± -1% perf-profile.perf_event_aux.part.51.perf_event_mmap.mmap_region.do_mmap.vm_mmap_pgoff 0.99 ± 3% -100.0% 0.00 ± -1% perf-profile.perf_event_aux_ctx.perf_event_aux.part.51.perf_event_mmap.mmap_region.do_mmap 4.78 ± 3% -100.0% 0.00 ± -1% perf-profile.perf_event_mmap.mmap_region.do_mmap.vm_mmap_pgoff.sys_mmap_pgoff 4.51 ± 3% -100.0% 0.00 ± -1% perf-profile.print_context_stack.dump_trace.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity 21.70 ± 1% +332.1% 93.75 ± 0% perf-profile.rwsem_down_write_failed.call_rwsem_down_write_failed.down_write.vma_link.mmap_region 9.58 ± 2% -86.6% 1.28 ± 1% perf-profile.rwsem_spin_on_owner.rwsem_down_write_failed.call_rwsem_down_write_failed.down_write.vma_link 15.49 ± 1% -95.5% 0.70 ± 1% perf-profile.rwsem_wake.call_rwsem_wake.up_write.vma_link.mmap_region 5.05 ± 2% -100.0% 0.00 ± -1% perf-profile.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.activate_task 1.54 ± 3% -100.0% 0.00 ± -1% perf-profile.schedule.rwsem_down_write_failed.call_rwsem_down_write_failed.down_write.vma_link 1.14 ± 4% -100.0% 0.00 ± -1% perf-profile.schedule.schedule_preempt_disabled.cpu_startup_entry.start_secondary 1.17 ± 4% -100.0% 0.00 ± -1% perf-profile.schedule_preempt_disabled.cpu_startup_entry.start_secondary 8.47 ± 2% -85.2% 1.25 ± 3% perf-profile.start_secondary 65.31 ± 1% +48.4% 96.88 ± 0% perf-profile.sys_mmap.entry_SYSCALL_64_fastpath 65.12 ± 1% +48.8% 96.86 ± 0% perf-profile.sys_mmap_pgoff.sys_mmap.entry_SYSCALL_64_fastpath 0.98 ± 2% -100.0% 0.00 ± -1% perf-profile.tick_nohz_idle_enter.cpu_startup_entry.start_secondary 13.67 ± 1% -97.2% 0.38 ± 57% perf-profile.try_to_wake_up.wake_up_q.rwsem_wake.call_rwsem_wake.up_write 7.10 ± 2% -100.0% 0.00 ± -1% perf-profile.ttwu_do_activate.try_to_wake_up.wake_up_q.rwsem_wake.call_rwsem_wake 3.43 ± 3% -100.0% 0.00 ± -1% perf-profile.unmapped_area_topdown.arch_get_unmapped_area_topdown.get_unmapped_area.do_mmap.vm_mmap_pgoff 16.84 ± 1% -94.4% 0.94 ± 1% perf-profile.up_write.vma_link.mmap_region.do_mmap.vm_mmap_pgoff 64.03 ± 1% +51.1% 96.78 ± 0% perf-profile.vm_mmap_pgoff.sys_mmap_pgoff.sys_mmap.entry_SYSCALL_64_fastpath 2.58 ± 4% -100.0% 0.00 ± -1% perf-profile.vma_compute_subtree_gap.__vma_link_rb.vma_link.mmap_region.do_mmap 6.72 ± 2% -88.9% 0.74 ± 1% perf-profile.vma_interval_tree_insert.vma_link.mmap_region.do_mmap.vm_mmap_pgoff 51.39 ± 1% +86.7% 95.97 ± 0% perf-profile.vma_link.mmap_region.do_mmap.vm_mmap_pgoff.sys_mmap_pgoff 1.64 ± 2% -100.0% 0.00 ± -1% perf-profile.vmacache_find.__do_page_fault.do_page_fault.page_fault 14.27 ± 1% -96.3% 0.52 ± 2% perf-profile.wake_up_q.rwsem_wake.call_rwsem_wake.up_write.vma_link 10463 ± 7% +636.3% 77037 ± 0% sched_debug.cfs_rq:/.exec_clock.avg 65159 ± 4% +116.0% 140713 ± 0% sched_debug.cfs_rq:/.exec_clock.max 8.59 ± 10% +1.2e+05% 10590 ± 8% sched_debug.cfs_rq:/.exec_clock.min 20889 ± 5% +144.4% 51052 ± 0% sched_debug.cfs_rq:/.exec_clock.stddev 75624 ± 7% +376.4% 360297 ± 9% sched_debug.cfs_rq:/.load.avg 259528 ± 3% +70.1% 441549 ± 1% sched_debug.cfs_rq:/.load.stddev 35.36 ± 8% +888.0% 349.36 ± 4% sched_debug.cfs_rq:/.load_avg.avg 472.18 ± 4% +97.7% 933.61 ± 1% sched_debug.cfs_rq:/.load_avg.max 93.62 ± 4% +296.7% 371.44 ± 2% sched_debug.cfs_rq:/.load_avg.stddev 11149 ± 7% +644.1% 82960 ± 0% sched_debug.cfs_rq:/.min_vruntime.avg 77111 ± 4% +115.4% 166103 ± 1% sched_debug.cfs_rq:/.min_vruntime.max 33.03 ± 16% +34364.2% 11384 ± 8% sched_debug.cfs_rq:/.min_vruntime.min 21855 ± 4% +153.1% 55322 ± 0% sched_debug.cfs_rq:/.min_vruntime.stddev 0.07 ± 8% +393.4% 0.37 ± 9% sched_debug.cfs_rq:/.nr_running.avg 0.25 ± 3% +77.4% 0.45 ± 1% sched_debug.cfs_rq:/.nr_running.stddev 0.87 ± 76% -67.0% 0.29 ± 0% sched_debug.cfs_rq:/.nr_spread_over.max 20.55 ± 10% +1341.8% 296.33 ± 10% sched_debug.cfs_rq:/.runnable_load_avg.avg 424.18 ± 4% +117.3% 921.61 ± 0% sched_debug.cfs_rq:/.runnable_load_avg.max 73.46 ± 6% +406.9% 372.33 ± 2% sched_debug.cfs_rq:/.runnable_load_avg.stddev -14545 ±-25% +454.1% -80596 ± -6% sched_debug.cfs_rq:/.spread0.avg 51417 ± 5% -95.0% 2552 ±170% sched_debug.cfs_rq:/.spread0.max -25662 ±-13% +493.0% -152174 ± -3% sched_debug.cfs_rq:/.spread0.min 21855 ± 4% +153.1% 55325 ± 0% sched_debug.cfs_rq:/.spread0.stddev 62.95 ± 4% +494.4% 374.18 ± 5% sched_debug.cfs_rq:/.util_avg.avg 635.11 ± 1% +55.0% 984.68 ± 0% sched_debug.cfs_rq:/.util_avg.max 158.75 ± 5% +148.5% 394.44 ± 2% sched_debug.cfs_rq:/.util_avg.stddev 875095 ± 0% -34.2% 575548 ± 1% sched_debug.cpu.avg_idle.avg 296076 ± 2% +18.4% 350683 ± 1% sched_debug.cpu.avg_idle.stddev 191988 ± 7% +22.1% 234365 ± 1% sched_debug.cpu.clock.avg 191997 ± 7% +22.1% 234376 ± 1% sched_debug.cpu.clock.max 191977 ± 7% +22.1% 234354 ± 1% sched_debug.cpu.clock.min 191988 ± 7% +22.1% 234365 ± 1% sched_debug.cpu.clock_task.avg 191997 ± 7% +22.1% 234376 ± 1% sched_debug.cpu.clock_task.max 191977 ± 7% +22.1% 234354 ± 1% sched_debug.cpu.clock_task.min 11.88 ± 6% +2391.7% 296.00 ± 10% sched_debug.cpu.cpu_load[0].avg 408.09 ± 5% +125.8% 921.50 ± 0% sched_debug.cpu.cpu_load[0].max 57.65 ± 2% +545.5% 372.11 ± 2% sched_debug.cpu.cpu_load[0].stddev 32.74 ± 8% +902.0% 328.06 ± 6% sched_debug.cpu.cpu_load[1].avg 463.61 ± 4% +99.0% 922.61 ± 0% sched_debug.cpu.cpu_load[1].max 93.84 ± 3% +304.2% 379.25 ± 1% sched_debug.cpu.cpu_load[1].stddev 30.12 ± 7% +979.8% 325.29 ± 6% sched_debug.cpu.cpu_load[2].avg 438.04 ± 6% +109.1% 915.75 ± 0% sched_debug.cpu.cpu_load[2].max 85.26 ± 2% +338.6% 373.90 ± 1% sched_debug.cpu.cpu_load[2].stddev 28.44 ± 7% +1036.6% 323.20 ± 6% sched_debug.cpu.cpu_load[3].avg 420.74 ± 6% +116.4% 910.68 ± 0% sched_debug.cpu.cpu_load[3].max 80.28 ± 2% +361.9% 370.82 ± 2% sched_debug.cpu.cpu_load[3].stddev 27.23 ± 7% +1077.1% 320.55 ± 6% sched_debug.cpu.cpu_load[4].avg 396.61 ± 6% +127.1% 900.50 ± 0% sched_debug.cpu.cpu_load[4].max 76.94 ± 2% +376.8% 366.82 ± 2% sched_debug.cpu.cpu_load[4].stddev 235.69 ± 5% +357.1% 1077 ± 8% sched_debug.cpu.curr->pid.avg 6956 ± 6% +20.0% 8348 ± 0% sched_debug.cpu.curr->pid.max 903.29 ± 1% +56.0% 1408 ± 1% sched_debug.cpu.curr->pid.stddev 77256 ± 7% +366.1% 360075 ± 9% sched_debug.cpu.load.avg 263553 ± 2% +67.3% 441053 ± 1% sched_debug.cpu.load.stddev 0.00 ± 8% +101.6% 0.00 ± 0% sched_debug.cpu.next_balance.stddev 58266 ± 8% +102.1% 117782 ± 0% sched_debug.cpu.nr_load_updates.avg 133378 ± 2% +26.1% 168128 ± 0% sched_debug.cpu.nr_load_updates.max 21971 ± 14% +189.1% 63516 ± 1% sched_debug.cpu.nr_load_updates.min 28738 ± 5% +40.5% 40386 ± 0% sched_debug.cpu.nr_load_updates.stddev 0.08 ± 6% +391.2% 0.37 ± 9% sched_debug.cpu.nr_running.avg 1.00 ± 0% +50.0% 1.50 ± 10% sched_debug.cpu.nr_running.max 0.26 ± 2% +78.4% 0.46 ± 2% sched_debug.cpu.nr_running.stddev 345325 ± 11% -65.8% 118270 ± 4% sched_debug.cpu.nr_switches.avg 2118306 ± 4% -86.1% 294560 ± 5% sched_debug.cpu.nr_switches.max 399.08 ± 7% +13742.8% 55244 ± 6% sched_debug.cpu.nr_switches.min 671281 ± 4% -95.3% 31593 ± 8% sched_debug.cpu.nr_switches.stddev 0.73 ± 3% -31.0% 0.50 ± 6% sched_debug.cpu.nr_uninterruptible.avg -66.07 ± -9% +41.7% -93.64 ±-12% sched_debug.cpu.nr_uninterruptible.min 354406 ± 12% -65.6% 121960 ± 4% sched_debug.cpu.sched_count.avg 2174091 ± 5% -85.4% 317654 ± 4% sched_debug.cpu.sched_count.max 171.33 ± 18% +32844.9% 56445 ± 6% sched_debug.cpu.sched_count.min 687726 ± 4% -95.0% 34670 ± 6% sched_debug.cpu.sched_count.stddev 172257 ± 11% -66.3% 58126 ± 4% sched_debug.cpu.sched_goidle.avg 1057582 ± 4% -86.3% 144970 ± 5% sched_debug.cpu.sched_goidle.max 75.65 ± 15% +35674.3% 27063 ± 6% sched_debug.cpu.sched_goidle.min 335348 ± 4% -95.3% 15620 ± 8% sched_debug.cpu.sched_goidle.stddev 184659 ± 12% -66.2% 62420 ± 4% sched_debug.cpu.ttwu_count.avg 1085187 ± 5% -89.2% 117333 ± 5% sched_debug.cpu.ttwu_count.max 76.58 ± 24% +14314.3% 11037 ± 9% sched_debug.cpu.ttwu_count.min 357336 ± 4% -88.7% 40436 ± 5% sched_debug.cpu.ttwu_count.stddev 177.87 ± 11% +347.9% 796.69 ± 2% sched_debug.cpu.ttwu_local.avg 955.39 ± 26% +144.0% 2331 ± 15% sched_debug.cpu.ttwu_local.max 47.56 ± 23% +762.7% 410.29 ± 7% sched_debug.cpu.ttwu_local.min 127.40 ± 16% +172.7% 347.37 ± 9% sched_debug.cpu.ttwu_local.stddev 191979 ± 7% +22.1% 234354 ± 1% sched_debug.cpu_clk 189651 ± 7% +22.3% 231918 ± 1% sched_debug.ktime 191979 ± 7% +22.1% 234354 ± 1% sched_debug.sched_clk vm-scalability.throughput 2.6e+07 *+------------------------------------*----------*----------------+ | *.*.*.* .*.*.*.*.*.*.*.**.*.*.*.*.* **.*.*. + *.*.*.* | 2.4e+07 ++ * * *.*.*.*.* | | 2.2e+07 ++ | | | 2e+07 ++ | | | 1.8e+07 ++ | | | 1.6e+07 ++ | | | 1.4e+07 ++ | O O O O OO O O O O O O O OO O O O O O O OO | 1.2e+07 ++----------------------------------------------------------------+ [*] bisect-good sample [O] bisect-bad sample To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Xiaolong

4 years, 8 months

1
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[lkp] [x86/KASLR] 2e1e7c3abd: -- System halted

by kernel test robot

FYI, we noticed the following commit: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git kaslr/highmem-relocs commit 2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b ("x86/KASLR: Add physical address randomization >4G") on test machine: vm-vp-quantal-x86_64: 2 threads qemu-system-x86_64 -enable-kvm with 360M memory caused below changes: +------------------------------------------------------------------+------------+------------+ | | cb3a00eb69 | 2e1e7c3abd | +------------------------------------------------------------------+------------+------------+ | boot_successes | 0 | 0 | | boot_failures | 8 | 10 | | BUG:kernel_test_hang | 2 | 2 | | backtrace:__ubsan_handle_type_mismatch | 8 | 2 | | backtrace:early_init_intel | 8 | 2 | | backtrace:early_cpu_init | 8 | 2 | | backtrace:check_mpx_erratum | 8 | 2 | | backtrace:fpu__init_cpu_xstate | 8 | 2 | | backtrace:fpu__init_cpu | 8 | 2 | | backtrace:fpu__init_system | 8 | 2 | | backtrace:fpu__init_system_xstate | 8 | 2 | | backtrace:vmware_platform | 8 | 2 | | backtrace:init_hypervisor_platform | 8 | 2 | | backtrace:ms_hyperv_platform | 8 | 2 | | backtrace:kvm_detect | 8 | 2 | | backtrace:mtrr_bp_init | 8 | 2 | | backtrace:prepare_set | 8 | 2 | | backtrace:mtrr_bp_pat_init | 8 | 2 | | backtrace:pat_init | 8 | 2 | | backtrace:post_set | 8 | 2 | | backtrace:init_mem_mapping | 8 | 2 | | backtrace:acpi_initialize_tables | 8 | | | backtrace:acpi_table_init | 8 | | | backtrace:acpi_boot_table_init | 8 | | | backtrace:acpi_tb_init_table_descriptor | 8 | | | backtrace:acpi_table_parse | 8 | 2 | | backtrace:early_acpi_boot_init | 8 | 2 | | backtrace:alloc_usemap_and_memmap | 8 | 2 | | backtrace:sparse_init | 8 | 2 | | backtrace:paging_init | 8 | 2 | | backtrace:acpi_boot_init | 8 | 2 | | backtrace:create_boot_cache | 8 | 2 | | backtrace:kmem_cache_init | 8 | 2 | | backtrace:arch_ioremap_pud_supported | 8 | 2 | | backtrace:ioremap_huge_init | 8 | 2 | | backtrace:arch_ioremap_pmd_supported | 8 | 2 | | backtrace:tsc_init | 8 | 2 | | backtrace:x86_late_time_init | 8 | 2 | | backtrace:unsynchronized_tsc | 8 | 2 | | backtrace:acpi_initialize_subsystem | 8 | 2 | | backtrace:acpi_early_init | 8 | 2 | | backtrace:init_intel | 8 | 2 | | backtrace:x86_init_rdrand | 8 | 2 | | backtrace:mce_available | 8 | 2 | | backtrace:mcheck_cpu_init | 8 | 2 | | backtrace:intel_pmu_init | 8 | 2 | | backtrace:init_hw_perf_events | 8 | 2 | | backtrace:kernel_init_freeable | 8 | 2 | | backtrace:set_real_mode_permissions | 8 | 2 | | backtrace:__alloc_workqueue_key | 8 | 2 | | backtrace:init_workqueues | 8 | 2 | | backtrace:APIC_init_uniprocessor | 8 | 2 | | backtrace:up_late_init | 8 | 2 | | backtrace:apic_bsp_setup | 8 | 2 | | backtrace:cpuset_init_smp | 8 | 2 | | backtrace:do_mount | 8 | 2 | | backtrace:SyS_mount | 8 | 2 | | backtrace:devtmpfsd | 8 | 2 | | backtrace:init_lapic_sysfs | 8 | 2 | | backtrace:calibrate_xor_blocks | 8 | 2 | | backtrace:bts_init | 8 | 2 | | backtrace:pt_init | 8 | 2 | | backtrace:mtrr_if_init | 8 | 2 | | backtrace:default_bdi_init | 8 | 2 | | backtrace:raid#_select_algo | 8 | 2 | | backtrace:acpi_load_tables | 8 | 2 | | backtrace:acpi_init | 8 | 2 | | backtrace:acpi_initialize_objects | 8 | 2 | | backtrace:acpi_early_processor_osc | 8 | 2 | | backtrace:acpi_get_table | 8 | | | backtrace:acpi_table_attr_init | 8 | | | backtrace:acpi_sysfs_init | 8 | | | backtrace:acpi_get_cpuid | 8 | 2 | | backtrace:early_init_pdc | 8 | 2 | | backtrace:acpi_early_processor_set_pdc | 8 | 2 | | backtrace:acpi_processor_set_pdc | 8 | 2 | | backtrace:acpi_bus_scan | 8 | 2 | | backtrace:acpi_scan_init | 8 | 2 | | backtrace:register_netdev | 8 | 2 | | backtrace:loopback_net_init | 8 | 2 | | backtrace:ops_init | 8 | 2 | | backtrace:register_pernet_device | 8 | 2 | | backtrace:net_dev_init | 8 | 2 | | backtrace:hpet_msi_capability_lookup | 8 | 2 | | backtrace:hpet_late_init | 8 | 2 | | backtrace:hpet_work | 8 | | | backtrace:tick_switch_to_oneshot | 8 | | | backtrace:tick_init_highres | 8 | | | backtrace:printk | 6 | | | backtrace:dquot_init | 6 | | | backtrace:acpi_get_devices | 8 | 2 | | backtrace:pnpacpi_init | 8 | 2 | | backtrace:populate_rootfs | 8 | 2 | | backtrace:vfs_symlink | 8 | 2 | | backtrace:SyS_symlinkat | 8 | 2 | | backtrace:SyS_symlink | 8 | 2 | | backtrace:do_sys_open | 2 | 2 | | backtrace:SyS_open | 2 | 2 | | backtrace:amd_ibs_init | 2 | 2 | | backtrace:msr_init | 2 | 2 | | backtrace:test_aperfmperf | 2 | 2 | | backtrace:test_ptsc | 2 | 2 | | backtrace:test_irperf | 2 | 2 | | backtrace:intel_uncore_init | 2 | 2 | | backtrace:cstate_pmu_init | 2 | 2 | | backtrace:init_tsc_clocksource | 2 | 2 | | backtrace:cryptomgr_test | 2 | 2 | | backtrace:chacha20_simd_mod_init | 2 | 2 | | backtrace:sha256_ssse3_mod_init | 2 | 2 | | backtrace:avx_usable | 2 | | | backtrace:sha512_ssse3_mod_init | 2 | 2 | | backtrace:camellia_aesni_init | 2 | 2 | | backtrace:tsc_refine_calibration_work | 2 | 2 | | backtrace:__pci_register_driver | 2 | 2 | | backtrace:virtio_pci_driver_init | 2 | 2 | | backtrace:__parport_register_driver | 2 | 2 | | backtrace:ppdev_init | 2 | 2 | | backtrace:do_group_exit | 2 | 2 | | backtrace:SyS_exit_group | 2 | 2 | | backtrace:driver_register | 2 | 2 | | backtrace:ide_cdrom_init | 2 | 2 | | backtrace:sdebug_add_adapter | 2 | 2 | | backtrace:scsi_debug_init | 2 | 2 | | backtrace:print_ICs | 2 | 2 | | backtrace:deferred_probe_initcall | 2 | 2 | | backtrace:ip_auto_config | 2 | 2 | | backtrace:sock_sendmsg | 2 | 2 | | backtrace:SyS_sendto | 2 | 2 | | backtrace:vfs_write | 2 | 2 | | backtrace:SyS_write | 2 | 2 | | backtrace:css_free_work_fn | 2 | 2 | | backtrace:pwq_dec_nr_in_flight | 2 | 2 | | backtrace:vfs_read | 2 | 2 | | backtrace:SyS_read | 2 | 2 | | invoked_oom-killer:gfp_mask=0x | 6 | | | warn_alloc_failed+0x | 6 | | | Mem-Info | 6 | | | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 6 | | | backtrace:init_cache_modes | 6 | | | backtrace:pat_disable | 6 | | | backtrace:vfs_lstat | 1 | | | backtrace:SyS_newlstat | 1 | | | backtrace:clocksource_done_booting | 2 | | | backtrace:filename_create | 2 | | | backtrace:setup_xstate_comp | 0 | 2 | | backtrace:avx2_usable | 0 | 2 | | backtrace:aesni_init | 0 | 2 | | backtrace:do_munmap | 0 | 1 | | backtrace:SyS_munmap | 0 | 1 | | System_halted | 0 | 8 | | BUG:kernel_boot_hang | 0 | 8 | +------------------------------------------------------------------+------------+------------+ Compressed data violation -- System halted Elapsed time: 440 BUG: kernel boot hang Linux version 4.7.0-rc1-00126-g2e1e7c3 #1 Command line: root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-vp-quantal-x86_64-25/bisect_boot-1-quantal-core-x86_64.cgz-x86_64-randconfig-v0-06040910-2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b-20160605-130167-h3dynt-0.yaml ARCH=x86_64 kconfig=x86_64-randconfig-v0-06040910 branch=linux-devel/devel-spot-201606040735 commit=2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b BOOT_IMAGE=/pkg/linux/x86_64-randconfig-v0-06040910/gcc-6/2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b/vmlinuz-4.7.0-rc1-00126-g2e1e7c3 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-vp-quantal-x86_64/quantal-core-x86_64.cgz/x86_64-randconfig-v0-06040910/gcc-6/2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-vp-quantal-x86_64-25::dhcp drbd.minor_count=8 qemu-system-x86_64 -enable-kvm -kernel /pkg/linux/x86_64-randconfig-v0-06040910/gcc-6/2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b/vmlinuz-4.7.0-rc1-00126-g2e1e7c3 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-vp-quantal-x86_64-25/bisect_boot-1-quantal-core-x86_64.cgz-x86_64-randconfig-v0-06040910-2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b-20160605-130167-h3dynt-0.yaml ARCH=x86_64 kconfig=x86_64-randconfig-v0-06040910 branch=linux-devel/devel-spot-201606040735 commit=2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b BOOT_IMAGE=/pkg/linux/x86_64-randconfig-v0-06040910/gcc-6/2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b/vmlinuz-4.7.0-rc1-00126-g2e1e7c3 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-vp-quantal-x86_64/quantal-core-x86_64.cgz/x86_64-randconfig-v0-06040910/gcc-6/2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-vp-quantal-x86_64-25::dhcp drbd.minor_count=8' -initrd /fs/sdc1/initrd-vm-vp-quantal-x86_64-25 -m 360 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-vm-vp-quantal-x86_64-25 -serial file:/dev/shm/kboot/serial-vm-vp-quantal-x86_64-25 -daemonize -display none -monitor null FYI, raw QEMU command line is: qemu-system-x86_64 -enable-kvm -kernel /pkg/linux/x86_64-randconfig-v0-06040910/gcc-6/2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b/vmlinuz-4.7.0-rc1-00126-g2e1e7c3 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-vp-quantal-x86_64-25/bisect_boot-1-quantal-core-x86_64.cgz-x86_64-randconfig-v0-06040910-2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b-20160605-130167-h3dynt-0.yaml ARCH=x86_64 kconfig=x86_64-randconfig-v0-06040910 branch=linux-devel/devel-spot-201606040735 commit=2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b BOOT_IMAGE=/pkg/linux/x86_64-randconfig-v0-06040910/gcc-6/2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b/vmlinuz-4.7.0-rc1-00126-g2e1e7c3 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-vp-quantal-x86_64/quantal-core-x86_64.cgz/x86_64-randconfig-v0-06040910/gcc-6/2e1e7c3abd33d77bb8f05e57c07ac91e8436ab9b/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-vp-quantal-x86_64-25::dhcp drbd.minor_count=8' -initrd /fs/sdc1/initrd-vm-vp-quantal-x86_64-25 -m 360 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-vm-vp-quantal-x86_64-25 -serial file:/dev/shm/kboot/serial-vm-vp-quantal-x86_64-25 -daemonize -display none -monitor null Thanks, Xiaolong

4 years, 8 months

1
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0 / 0

[x86/mm] c92efeaa76: BUG: unable to handle kernel paging request at fffff5df00000004

by kernel test robot

Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git kaslr/memory commit c92efeaa76bb548b9f1c302b8d9748bfdfd42f16 Author: Thomas Garnier <thgarnie(a)google.com> AuthorDate: Thu May 12 12:28:19 2016 -0700 Commit: Kees Cook <keescook(a)chromium.org> CommitDate: Fri Jun 3 09:04:34 2016 -0700 x86/mm: Implement ASLR for kernel memory sections (x86_64) Randomizes the virtual address space of kernel memory sections (physical memory mapping, vmalloc & vmemmap) for x86_64. This security feature mitigates exploits relying on predictable kernel addresses. These addresses can be used to disclose the kernel modules base addresses or corrupt specific structures to elevate privileges bypassing the current implementation of KASLR. This feature can be enabled with the CONFIG_RANDOMIZE_MEMORY option. The physical memory mapping holds most allocations from boot and heap allocators. Knowing the base address and physical memory size, an attacker can deduce the PDE virtual address for the vDSO memory page. This attack was demonstrated at CanSecWest 2016, in the "Getting Physical Extreme Abuse of Intel Based Paged Systems" https://goo.gl/ANpWdV (see second part of the presentation). The exploits used against Linux worked successfully against 4.6+ but fail with KASLR memory enabled (https://goo.gl/iTtXMJ). Similar research was done at Google leading to this patch proposal. Variants exists to overwrite /proc or /sys objects ACLs leading to elevation of privileges. These variants were tested against 4.6+. The vmalloc memory section contains the allocation made through the vmalloc API. The allocations are done sequentially to prevent fragmentation and each allocation address can easily be deduced especially from boot. The vmemmap section holds a representation of the physical memory (through a struct page array). An attacker could use this section to disclose the kernel memory layout (walking the page linked list). The order of each memory section is not changed. The feature looks at the available space for the sections based on different configuration options and randomizes the base and space between each. The size of the physical memory mapping is the available physical memory. No performance impact was detected while testing the feature. Entropy is generated using the KASLR early boot functions now shared in the lib directory (originally written by Kees Cook). Randomization is done on PGD & PUD page table levels to increase possible addresses. The physical memory mapping code was adapted to support PUD level virtual addresses. This implementation on the best configuration provides 30,000 possible virtual addresses in average for each memory section. An additional low memory page is used to ensure each CPU can start with a PGD aligned virtual address (for realmode). x86/dump_pagetable was updated to correctly display each section. The page offset used by the compressed kernel was changed to the static value, since it is not yet randomized during this boot stage. Updated documentation on x86_64 memory layout accordingly. Performance data: Kernbench shows almost no difference (-+ less than 1%): Before: Average Optimal load -j 12 Run (std deviation): Elapsed Time 102.63 (1.2695) User Time 1034.89 (1.18115) System Time 87.056 (0.456416) Percent CPU 1092.9 (13.892) Context Switches 199805 (3455.33) Sleeps 97907.8 (900.636) After: Average Optimal load -j 12 Run (std deviation): Elapsed Time 102.489 (1.10636) User Time 1034.86 (1.36053) System Time 87.764 (0.49345) Percent CPU 1095 (12.7715) Context Switches 199036 (4298.1) Sleeps 97681.6 (1031.11) Hackbench shows 0% difference on average (hackbench 90 repeated 10 times): attemp,before,after 1,0.076,0.069 2,0.072,0.069 3,0.066,0.066 4,0.066,0.068 5,0.066,0.067 6,0.066,0.069 7,0.067,0.066 8,0.063,0.067 9,0.067,0.065 10,0.068,0.071 average,0.0677,0.0677 Signed-off-by: Thomas Garnier <thgarnie(a)google.com> Signed-off-by: Kees Cook <keescook(a)chromium.org> +--------------------------------------------------------------+------------+------------+-----------------+ | | dfac57cb38 | c92efeaa76 | v4.7-rc1_060505 | +--------------------------------------------------------------+------------+------------+-----------------+ | boot_successes | 59 | 0 | 0 | | boot_failures | 47 | 27 | 13 | | BUG:kernel_boot_crashed | 19 | 4 | 1 | | BUG:kernel_boot_hang | 1 | 1 | | | INFO:rcu_sched_self-detected_stall_on_CPU | 22 | | | | INFO:rcu_sched_detected_stalls_on_CPUs/tasks | 25 | | | | backtrace:mark_rodata_ro | 22 | | | | BUG:KASAN:slab-out-of-bounds_in_apparmor_setprocattr_at_addr | 2 | | | | Out_of_memory:Kill_process | 1 | | | | BUG:unable_to_handle_kernel | 0 | 22 | 12 | | Oops | 0 | 22 | 12 | | RIP:reserve_bootmem_region | 0 | 11 | 4 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 22 | 12 | | backtrace:free_all_bootmem | 0 | 11 | 4 | | backtrace:mem_init | 0 | 11 | 4 | | RIP:check_memory_region | 0 | 11 | 8 | | backtrace:kmem_cache_create | 0 | 11 | 8 | | backtrace:vfs_caches_init | 0 | 11 | | | bit_relocation_outside_of_kernel | 0 | 1 | | | System_halted | 0 | 1 | | | backtrace:nsproxy_cache_init | 0 | 0 | 8 | | backtrace:proc_caches_init | 0 | 0 | 8 | +--------------------------------------------------------------+------------+------------+-----------------+ [ 0.000000] PID hash table entries: 2048 (order: 2, 16384 bytes) [ 0.000000] Dentry cache hash table entries: 65536 (order: 7, 524288 bytes) [ 0.000000] Inode-cache hash table entries: 32768 (order: 6, 262144 bytes) [ 0.000000] BUG: unable to handle kernel paging request at fffff5df00000004 [ 0.000000] IP: [<ffffffffaae319ff>] reserve_bootmem_region+0x84/0xce [ 0.000000] PGD 0 [ 0.000000] Oops: 0000 [#1] SMP KASAN [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.7.0-rc1-00130-gc92efea #1 [ 0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 0.000000] task: ffffffffaaa11e00 ti: ffffffffaaa00000 task.ti: ffffffffaaa00000 [ 0.000000] RIP: 0010:[<ffffffffaae319ff>] [<ffffffffaae319ff>] reserve_bootmem_region+0x84/0xce [ 0.000000] RSP: 0000:ffffffffaaa07d98 EFLAGS: 00010802 [ 0.000000] RAX: fffffbfff554bd10 RBX: 0000000000000000 RCX: 1ffff9df00000004 [ 0.000000] RDX: 1ffff21b2a2a5600 RSI: 0000000000000010 RDI: ffffffffaaf3db80 [ 0.000000] RBP: ffffffffaaa07dd0 R08: ffffffffaaa07d48 R09: ffffffffaadcd5f6 [ 0.000000] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 [ 0.000000] R13: dffffc0000000000 R14: ffffcef800000000 R15: ffffcef800000020 [ 0.000000] FS: 0000000000000000(0000) GS:ffff90d94dc00000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: fffff5df00000004 CR3: 0000000007a0a000 CR4: 00000000000006b0 [ 0.000000] Stack: [ 0.000000] fffffbfff554bd10 0000000000000010 ffffffffaaa07ec8 ffff90d95151fd01 [ 0.000000] ffffffffaaa07e08 ffffffffaaa07e48 ffffffffaaa07e88 ffffffffaaa07ef0 [ 0.000000] ffffffffaade10ea 1ffffffff5540fbd 0000000041b58ab3 ffffffffaa7aba45 [ 0.000000] Call Trace: [ 0.000000] [<ffffffffaade10ea>] free_all_bootmem+0xea/0x223 [ 0.000000] [<ffffffffaade1000>] ? reset_all_zones_managed_pages+0x58/0x58 [ 0.000000] [<ffffffffaadba8ec>] ? find_dependents_of+0x9a/0x9a [ 0.000000] [<ffffffffaadcd56e>] ? pci_swiotlb_detect_override+0x57/0x57 [ 0.000000] [<ffffffffaadcd5f6>] ? pci_xen_swiotlb_detect+0x8/0x8 [ 0.000000] [<ffffffffaadcd63a>] ? pci_swiotlb_init+0x44/0x44 [ 0.000000] [<ffffffffaadbab31>] ? check_iommu_entries+0xd6/0x133 [ 0.000000] [<ffffffffaadcea2c>] mem_init+0x13/0x57 [ 0.000000] [<ffffffffaada546c>] start_kernel+0x270/0x603 [ 0.000000] [<ffffffffaada51fc>] ? thread_info_cache_init+0xb/0xb [ 0.000000] [<ffffffffaae35879>] ? memblock_reserve+0x59/0x5e [ 0.000000] [<ffffffffaada4120>] ? early_idt_handler_array+0x120/0x120 [ 0.000000] [<ffffffffaada429a>] x86_64_start_reservations+0x29/0x2b [ 0.000000] [<ffffffffaada4384>] x86_64_start_kernel+0xe8/0xf5 [ 0.000000] Code: 5e 48 8b 45 c8 80 38 00 74 0c 48 c7 c7 80 e8 a5 aa e8 28 5b 6a fe 4d 89 e6 4c 03 35 8c ce c2 ff 4d 8d 7e 20 4c 89 f9 48 c1 e9 03 <42> 80 3c 29 00 74 08 4c 89 ff e8 7b 5b 6a fe 49 8d 7e 28 4d 89 [ 0.000000] RIP [<ffffffffaae319ff>] reserve_bootmem_region+0x84/0xce [ 0.000000] RSP <ffffffffaaa07d98> [ 0.000000] CR2: fffff5df00000004 [ 0.000000] ---[ end trace ad3a89ca250b9c80 ]--- [ 0.000000] Kernel panic - not syncing: Fatal exception git bisect start 77480cfa52e7b51bab1a4f4711a4f52ad99f9b6a v4.6 -- git bisect good c174c6f15352dced3f47c92101feaea8729b4f59 # 11:41 22+ 22 Merge 'linux-review/Yingjoe-Chen/checkpatch-add-Kconfig-default-n-test/20160604-131412' into devel-hourly-2016060505 git bisect bad fa883244e2ef4a2026dcd27670b333758468c2e6 # 11:52 3- 22 Merge 'linux-review/Andrew-F-Davis/hwmon-tmp401-Add-support-for-TI-TMP461/20160601-003137' into devel-hourly-2016060505 git bisect good a4336b47e94878b4701ebd24c85375fc5bdddaf6 # 12:02 23+ 23 Merge 'linux-review/Guenter-Roeck/iwlwifi-Remove-unused-array-iwlagn_loose_lookup/20160604-054457' into devel-hourly-2016060505 git bisect good 4efcffad022a9de72253bdd494c6764c1191251f # 12:12 22+ 23 Merge 'linux-review/Andy-Shevchenko/lib-uuid-add-a-test-module/20160530-224317' into devel-hourly-2016060505 git bisect good cff8d2a4b6022c9cf2b651c592b5d44a530f2046 # 12:32 23+ 23 Merge 'random/dev' into devel-hourly-2016060505 git bisect bad 2346f731a5463a047c840830c941891fc84758ff # 12:45 3- 23 Merge 'linux-review/Florian-Fainelli/mtd-brcmnand-Add-v7-2-controller-support/20160601-013844' into devel-hourly-2016060505 git bisect good 99195d5b1f89060b4a4cea4a7034f7d3c087a6ac # 12:51 22+ 22 Merge 'linux-review/Dan-Carpenter/usb-f_fs-off-by-one-bug-in-_ffs_func_bind/20160528-125152' into devel-hourly-2016060505 git bisect good 7a5acb2e3273ba1823435e945b56a886290c1a34 # 13:05 23+ 23 Merge 'linux-review/Wei-Fang/scsi-fix-race-between-simultaneous-decrements-of-host_failed/20160602-163811' into devel-hourly-2016060505 git bisect bad 0132202bbdd7ae165c184d98e1490e8c422b5a67 # 13:15 2- 22 Merge 'linux-review/dinguyen-opensource-altera-com/usb-dwc2-Add-reset-control-to-dwc2/20160604-000810' into devel-hourly-2016060505 git bisect bad bfd7adf8fae005d026d9838641ec172607838b7d # 13:33 4- 22 Merge 'kees/kaslr/memory' into devel-hourly-2016060505 git bisect good a866e834997437307204efdc4f11a89d5dc39a89 # 13:46 24+ 4 x86/KASLR: Allow randomization below load address git bisect good dfac57cb382d0e85382a4e530b1b913bdbf6cebb # 13:57 24+ 7 x86/mm: PUD VA support for physical mapping (x86_64) git bisect bad 8479658a975566b290854d83bc8b99411e024602 # 14:09 8- 23 x86/mm: Memory hotplug support for KASLR memory randomization git bisect bad c92efeaa76bb548b9f1c302b8d9748bfdfd42f16 # 14:21 4- 26 x86/mm: Implement ASLR for kernel memory sections (x86_64) # first bad commit: [c92efeaa76bb548b9f1c302b8d9748bfdfd42f16] x86/mm: Implement ASLR for kernel memory sections (x86_64) git bisect good dfac57cb382d0e85382a4e530b1b913bdbf6cebb # 14:27 81+ 46 x86/mm: PUD VA support for physical mapping (x86_64) # extra tests with CONFIG_DEBUG_INFO_REDUCED git bisect bad c92efeaa76bb548b9f1c302b8d9748bfdfd42f16 # 14:32 4- 22 x86/mm: Implement ASLR for kernel memory sections (x86_64) # extra tests on HEAD of linux-devel/devel-hourly-2016060505 git bisect bad 77480cfa52e7b51bab1a4f4711a4f52ad99f9b6a # 14:32 0- 13 0day head guard for 'devel-hourly-2016060505' # extra tests on tree/branch kees/kaslr/memory git bisect bad 8479658a975566b290854d83bc8b99411e024602 # 14:33 0- 24 x86/mm: Memory hotplug support for KASLR memory randomization # extra tests on tree/branch linus/master git bisect good 049ec1b5a76d34a6980cccdb7c0baeb4eed7a993 # 14:43 81+ 22 Merge tag 'drm-fixes-for-v4.7-rc2' of git://people.freedesktop.org/~airlied/linux # extra tests on tree/branch linux-next/master git bisect good 64289ca05e2da843120e9ebf726dd336194996ae # 14:55 79+ 33 Add linux-next specific files for 20160603 This script may reproduce the error. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 kvm=( qemu-system-x86_64 -enable-kvm -cpu kvm64 -kernel $kernel -m 300 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -serial stdio -display none -monitor null ) append=( hung_task_panic=1 earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw drbd.minor_count=8 ) "${kvm[@]}" --append "${append[*]}" ---------------------------------------------------------------------------- --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/lkp Intel Corporation

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[x86/uaccess] 69ba758fea: BUG: uaccess fault at 0xffff880036b18000 with KERNEL_DS

by kernel test robot

FYI, we noticed the following commit: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git x86/uaccess commit 69ba758fea06cfb812c4f8aed268e7220a18c5ec ("x86/uaccess: OOPS or warn on a fault with KERNEL_DS and !pagefault_disabled()") on test machine: vm-kbuild-1G: 2 threads qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap with 1G memory caused below changes: +----------------+------------+------------+ | | 912b531949 | 69ba758fea | +----------------+------------+------------+ | boot_successes | 2 | 0 | +----------------+------------+------------+ [ 0.583483] apic 0 pin 23 not connected [ 0.584358] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 [ 0.586124] TSC deadline timer enabled [ 0.598914] BUG: uaccess fault at 0xffff880036b18000 with KERNEL_DS [ 0.600685] BUG: unable to handle kernel paging request at ffff880036b18000 [ 0.602690] IP: [<ffffffff811546fa>] copy_mount_options+0x124/0x19c [ 0.604489] PGD 18b6067 PUD 18b7067 PMD 3874c067 PTE 8000000036b18060 [ 0.606397] Oops: 0000 [#1] DEBUG_PAGEALLOC [ 0.624298] Modules linked in: [ 0.625183] CPU: 0 PID: 8 Comm: kdevtmpfs Not tainted 4.7.0-rc1-00129-g69ba758 #1 [ 0.627233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 0.635177] task: ffff880036b00540 ti: ffff880036b14000 task.ti: ffff880036b14000 [ 0.637276] task.addr_limit: 0xffffffffffffffff [ 0.638661] RIP: 0010:[<ffffffff811546fa>] [<ffffffff811546fa>] copy_mount_options+0x124/0x19c [ 0.641069] RSP: 0000:ffff880036b17df0 EFLAGS: 00010206 [ 0.642538] RAX: 0000000000000000 RBX: 0000000000000e7e RCX: 0000000000000000 [ 0.659516] RDX: ffff880036a85182 RSI: 0000000000000000 RDI: ffffffff816bc6b8 [ 0.661378] RBP: ffff880036b17e30 R08: 0000000000001000 R09: 00003ffffffff000 [ 0.663340] R10: ffff880036b17cc8 R11: 0000000000000001 R12: ffff880036b18000 [ 0.665285] R13: 0000000000001000 R14: 0000000036b17e01 R15: ffff880036a85000 [ 0.678571] FS: 0000000000000000(0000) GS:ffffffff8162d000(0000) knlGS:0000000000000000 [ 0.680849] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.682434] CR2: ffff880036b18000 CR3: 000000000160c000 CR4: 00000000000406b0 [ 0.684448] Stack: [ 0.685033] 0000000000000000 ffff880036b18e7e ffffffffffffffff ffffffff8152b089 [ 0.687205] ffff880036afda40 ffff880036afd000 ffff880036b17e7e 0000000000008000 [ 0.698344] ffff880036b17e68 ffffffff811554fd ffff880036ab7ee4 ffff880036ab7ee4 [ 0.705908] Call Trace: [ 0.706581] [<ffffffff811554fd>] SyS_mount+0x8f/0xf6 [ 0.707798] [<ffffffff81263850>] ? handle_create+0x207/0x207 [ 0.714078] [<ffffffff812638ae>] devtmpfsd+0x5e/0x152 [ 0.715360] [<ffffffff81263850>] ? handle_create+0x207/0x207 [ 0.716861] [<ffffffff810590c8>] kthread+0xee/0xf6 [ 0.718131] [<ffffffff81355f7f>] ret_from_fork+0x1f/0x40 [ 0.723098] [<ffffffff81058fda>] ? kthread_worker_fn+0x1d7/0x1d7 [ 0.737345] Code: ff 41 83 f6 01 41 0f b6 f6 ba 01 00 00 00 48 c7 c7 b8 c6 6b 81 e8 d0 a6 f5 ff 45 84 f6 74 34 4c 89 fa 31 c9 eb 28 0f 1f 00 89 c8 <41> 8a 34 24 0f 1f 00 85 c0 74 0b 89 d9 31 c0 48 89 d7 f3 aa eb [ 0.743648] RIP [<ffffffff811546fa>] copy_mount_options+0x124/0x19c [ 0.745401] RSP <ffff880036b17df0> [ 0.746394] CR2: ffff880036b18000 [ 0.747273] ---[ end trace 5b586953c01d161b ]--- [ 0.754807] Kernel panic - not syncing: Fatal exception FYI, raw QEMU command line is: qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -kernel /pkg/linux/x86_64-randconfig-s4-06040525/gcc-6/69ba758fea06cfb812c4f8aed268e7220a18c5ec/vmlinuz-4.7.0-rc1-00129-g69ba758 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-1G-2/bisect_boot-1-debian-x86_64-2015-02-07.cgz-x86_64-randconfig-s4-06040525-69ba758fea06cfb812c4f8aed268e7220a18c5ec-20160604-38251-olqjqa-0.yaml ARCH=x86_64 kconfig=x86_64-randconfig-s4-06040525 branch=linux-devel/devel-hourly-2016060401 commit=69ba758fea06cfb812c4f8aed268e7220a18c5ec BOOT_IMAGE=/pkg/linux/x86_64-randconfig-s4-06040525/gcc-6/69ba758fea06cfb812c4f8aed268e7220a18c5ec/vmlinuz-4.7.0-rc1-00129-g69ba758 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-1G/debian-x86_64-2015-02-07.cgz/x86_64-randconfig-s4-06040525/gcc-6/69ba758fea06cfb812c4f8aed268e7220a18c5ec/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-kbuild-1G-2::dhcp' -initrd /fs/sdd1/initrd-vm-kbuild-1G-2 -m 1024 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0,hostfwd=tcp::23001-:22 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -device virtio-scsi-pci,id=scsi0 -drive file=/fs/sdd1/disk0-vm-kbuild-1G-2,if=none,id=hd0,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd0,scsi-id=1,lun=0 -drive file=/fs/sdd1/disk1-vm-kbuild-1G-2,if=none,id=hd1,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd1,scsi-id=1,lun=1 -drive file=/fs/sdd1/disk2-vm-kbuild-1G-2,if=none,id=hd2,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd2,scsi-id=1,lun=2 -drive file=/fs/sdd1/disk3-vm-kbuild-1G-2,if=none,id=hd3,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd3,scsi-id=1,lun=3 -drive file=/fs/sdd1/disk4-vm-kbuild-1G-2,if=none,id=hd4,media=disk,aio=native,cache=none -device scsi-hd,bus=scsi0.0,drive=hd4,scsi-id=1,lun=4 -pidfile /dev/shm/kboot/pid-vm-kbuild-1G-2 -serial file:/dev/shm/kboot/serial-vm-kbuild-1G-2 -daemonize -display none -monitor null Thanks, Kernel Test Robot

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