Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is aaron/swap_numa commit 0b444cfa6cd3db4a5954a010bc801ae6b01f464d Author: Aaron Lu <aaron.lu(a)intel.com&gt; AuthorDate: Fri Mar 18 17:07:31 2016 +0800 Commit: Aaron Lu <aaron.lu(a)intel.com&gt; CommitDate: Fri Mar 18 17:07:31 2016 +0800 page_allocation: do not clear page after allocation +-----------------------------------------------------+------------+------------+------------+ | | 5a430f9c20 | 0b444cfa6c | d0d4199eb9 | +-----------------------------------------------------+------------+------------+------------+ | boot_successes | 112 | 0 | 0 | | boot_failures | 6 | 29 | 13 | | BUG:unable_to_handle_kernel | 6 | 14 | 5 | | Oops | 6 | 14 | 5 | | EIP_is_at_perf_prepare_sample | 6 | | | | Kernel_panic-not_syncing:Fatal_exception | 6 | 17 | 5 | | backtrace:iterate_dir | 3 | | | | backtrace:SyS_getdents64 | 3 | | | | EIP_is_at_kmap_atomic_prot | 0 | 9 | 3 | | backtrace:do_execve | 0 | 12 | 4 | | backtrace:SyS_execve | 0 | 12 | 4 | | BUG:Bad_page_map_in_process | 0 | 13 | 4 | | BUG:Bad_page_state_in_process | 0 | 9 | 1 | | invoked_oom-killer:gfp_mask=0x | 0 | 7 | 2 | | Mem-Info | 0 | 7 | 2 | | Out_of_memory:Kill_process | 0 | 7 | 2 | | EIP_is_at_compound_head | 0 | 5 | 1 | | BUG:Bad_rss-counter_state_mm:#idx:#val | 0 | 5 | | | kernel_BUG_at_include/linux/mm.h | 0 | 3 | 1 | | invalid_opcode:#[##] | 0 | 3 | 1 | | invalid_opcode:#[##]DEBUG_PAGEALLOC_DEBUG_PAGEALLOC | 0 | 3 | 1 | | EIP_is_at_put_page_testzero | 0 | 2 | 1 | | backtrace:_do_fork | 0 | 3 | | | backtrace:SyS_clone | 0 | 3 | | | BUG:kernel_boot_hang | 0 | 8 | 6 | | backtrace:do_group_exit | 0 | 1 | | | backtrace:SyS_exit_group | 0 | 1 | | | EIP_is_at_follow_page_mask | 0 | 1 | | +-----------------------------------------------------+------------+------------+------------+ [ 4.808107] rc.local[97]: segfault at 1cb7 ip 77770a5c sp 7fd7daf0 error 6 [ 4.808107] rc.local[97]: segfault at 1cb7 ip 77770a5c sp 7fd7daf0 error 6 in ld-2.15.so[7776a000+20000] in ld-2.15.so[7776a000+20000] [ 4.824273] BUG: Bad page map in process init pte:02434063 pmd:0b2af067 [ 4.824273] BUG: Bad page map in process init pte:02434063 pmd:0b2af067 Elapsed time: 20 qemu-system-x86_64 -enable-kvm -cpu kvm64 -kernel /pkg/linux/i386-randconfig-i1-201611/gcc-5/0b444cfa6cd3db4a5954a010bc801ae6b01f464d/vmlinuz-4.5.0-rc4-00004-g0b444cf -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 link=/kbuild-tests/run-queue/kvm/i386-randconfig-i1-201611/linux-devel:devel-catchup-201603181757:0b444cfa6cd3db4a5954a010bc801ae6b01f464d:bisect-linux-1/.vmlinuz-0b444cfa6cd3db4a5954a010bc801ae6b01f464d-20160318194046-27-intel12 branch=linux-devel/devel-catchup-201603181757 BOOT_IMAGE=/pkg/linux/i386-randconfig-i1-201611/gcc-5/0b444cfa6cd3db4a5954a010bc801ae6b01f464d/vmlinuz-4.5.0-rc4-00004-g0b444cf drbd.minor_count=8' -initrd /osimage/quantal/quantal-core-i386.cgz -m 300 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/KVM/disk0-quantal-intel12-32,media=disk,if=virtio -drive file=/fs/KVM/disk1-quantal-intel12-32,media=disk,if=virtio -drive file=/fs/KVM/disk2-quantal-intel12-32,media=disk,if=virtio -drive file=/fs/KVM/disk3-quantal-intel12-32,media=disk,if=virtio -drive file=/fs/KVM/disk4-quantal-intel12-32,media=disk,if=virtio -drive file=/fs/KVM/disk5-quantal-intel12-32,media=disk,if=virtio -drive file=/fs/KVM/disk6-quantal-intel12-32,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-quantal-intel12-32 -serial file:/dev/shm/kboot/serial-quantal-intel12-32 -daemonize -display none -monitor null git bisect start d0d4199eb9a99adbe8f940b66e66ddcf8df205b1 b562e44f507e863c6792946e4e1b1449fbbac85d -- git bisect bad 11995d1888d0e33f154abc61ec2ecb92dc68024f # 18:45 5- 25 Merge 'xtensa/for_next' into devel-catchup-201603181757 git bisect good d690e919abe1fd78c8d922d72de5821f303836e5 # 18:50 29+ 2 Merge 'wsa/i2c/for-next' into devel-catchup-201603181757 git bisect bad 23ee57a1dd5a535208a7d4711e42f14095a3b947 # 19:00 7- 30 Merge 'aaron/swap_numa' into devel-catchup-201603181757 git bisect good d345b0a8c1a7abb236fd4e32850c8fcc98b53888 # 19:11 29+ 3 Merge 'kvalo-ath/ath-qca' into devel-catchup-201603181757 git bisect good c2efa9252cad76077151a98f9c65ddfe799ff09e # 19:25 29+ 1 swap_numa: add two events for swap allocation on local/remote node git bisect bad 0b444cfa6cd3db4a5954a010bc801ae6b01f464d # 19:41 6- 16 page_allocation: do not clear page after allocation git bisect good 5a430f9c20a4cb8b66e0f65b987f2564305a0b5c # 19:56 29+ 1 pmem: add 2 events for pmem local write and remote write # first bad commit: [0b444cfa6cd3db4a5954a010bc801ae6b01f464d] page_allocation: do not clear page after allocation git bisect good 5a430f9c20a4cb8b66e0f65b987f2564305a0b5c # 19:58 88+ 6 pmem: add 2 events for pmem local write and remote write # extra tests with DEBUG_INFO git bisect bad 0b444cfa6cd3db4a5954a010bc801ae6b01f464d # 20:16 32- 72 page_allocation: do not clear page after allocation # extra tests on HEAD of linux-devel/devel-catchup-201603181757 git bisect bad d0d4199eb9a99adbe8f940b66e66ddcf8df205b1 # 20:16 0- 13 0day head guard for 'devel-catchup-201603181757' # extra tests on tree/branch aaron/swap_numa git bisect bad 0b444cfa6cd3db4a5954a010bc801ae6b01f464d # 20:17 0- 29 page_allocation: do not clear page after allocation # extra tests with first bad commit reverted git bisect good fb3c9d2bb8c7f0c36b19e6b6f0c72b70e4836446 # 20:29 89+ 3 Revert "page_allocation: do not clear page after allocation" # extra tests on tree/branch linus/master git bisect good 9dffdb38d864ae89e16ff7b3a09451270736e35b # 20:32 88+ 2 Merge tag 'staging-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging # extra tests on tree/branch linux-next/master git bisect good 5e3497cca281616e7930b74a0076b7324dcc2057 # 20:35 83+ 3 Add linux-next specific files for 20160318 This script may reproduce the error. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=quantal-core-i386.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$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