[LKP] [of: unittest] b10ede0662: INFO: task swapper/0:1 blocked for more than 120 seconds.

Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git topic/renesas-overlays commit b10ede0662892492fa3a9bdcdbf81152042b4dac Author: Pantelis Antoniou <pantelis.antoniou(a)konsulko.com&gt; AuthorDate: Wed Oct 14 13:16:15 2015 +0300 Commit: Geert Uytterhoeven <geert+renesas(a)glider.be&gt; CommitDate: Tue Mar 29 14:44:08 2016 +0200 of: unittest: changeset helpers Signed-off-by: Pantelis Antoniou <pantelis.antoniou(a)konsulko.com&gt; +-------------------------------------------------------+------------+------------+------------+ | | d82232727c | b10ede0662 | 6b61c6f1e2 | +-------------------------------------------------------+------------+------------+------------+ | boot_successes | 138 | 0 | 0 | | boot_failures | 4 | 40 | 66 | | BUG:unable_to_handle_kernel | 4 | | | | Oops | 4 | | | | EIP_is_at_perf_prepare_sample | 4 | | | | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 4 | | | | backtrace:vfs_fstatat | 1 | | | | backtrace:SyS_fstatat64 | 1 | | | | INFO:task_blocked_for_more_than#seconds | 0 | 40 | 66 | | EIP_is_at_native_safe_halt | 0 | 7 | 23 | | EIP_is_at_native_apic_mem_write | 0 | 40 | 66 | | Kernel_panic-not_syncing:hung_task:blocked_tasks | 0 | 40 | 66 | | backtrace:of_unittest | 0 | 40 | 66 | | backtrace:kernel_init_freeable | 0 | 40 | 66 | | backtrace:cpu_startup_entry | 0 | 7 | 24 | | backtrace:watchdog | 0 | 40 | 66 | | EIP_is_at_delay_tsc | 0 | 0 | 3 | +-------------------------------------------------------+------------+------------+------------+ [ 61.117813] Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 121.117845] Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 181.117888] Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 240.473917] INFO: task swapper/0:1 blocked for more than 120 seconds. [ 240.475412] Not tainted 4.6.0-rc1-00021-gb10ede0 #1 [ 240.476609] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 240.478355] swapper/0 D 00000000 6356 1 0 0x00000000 [ 240.479802] 78053e7c 00000046 7cd3de56 00000000 87a9fd30 78070040 78054000 78070040 [ 240.481698] 7d288164 78053e88 7cdfe649 7d288160 78053e90 7cdfe66c 78053ec4 7cdff20f [ 240.483659] 7d288184 7d288194 7cd3de56 00000246 7d288184 7d288184 78070040 78053ea8 [ 240.485471] Call Trace: [ 240.485999] [<7cd3de56>] ? of_changeset_apply+0x12/0x2a [ 240.487074] [<7cdfe649>] schedule+0x6f/0x83 [ 240.487916] [<7cdfe66c>] schedule_preempt_disabled+0xf/0x18 [ 240.489073] [<7cdff20f>] mutex_lock_nested+0x191/0x308 [ 240.490118] [<7cd3de56>] ? of_changeset_apply+0x12/0x2a [ 240.491182] [<7cd3de56>] of_changeset_apply+0x12/0x2a [ 240.492227] [<7d2fa61c>] of_unittest+0x97c/0xdc5 [ 240.493181] [<7c8b93e8>] ? kfree+0xdd/0xfa [ 240.494051] [<7c8b93e8>] ? kfree+0xdd/0xfa [ 240.494814] [<7d2c2b09>] ? do_one_initcall+0x7a/0x149 [ 240.495755] [<7d2f9ca0>] ? of_unittest_changeset+0x4a1/0x4a1 [ 240.496880] [<7d2c2b09>] ? do_one_initcall+0x7a/0x149 [ 240.497861] [<7d2f9ca0>] ? of_unittest_changeset+0x4a1/0x4a1 [ 240.498930] [<7d2c2b5f>] do_one_initcall+0xd0/0x149 [ 240.499874] [<7c83ee18>] ? parse_args+0x1c3/0x28f [ 240.500804] [<7d2c2cb9>] ? kernel_init_freeable+0xe1/0x17e [ 240.501882] [<7d2c2cd9>] kernel_init_freeable+0x101/0x17e [ 240.502892] [<7cdfd2a7>] kernel_init+0x8/0xd0 [ 240.503725] [<7ce01c11>] ret_from_kernel_thread+0x21/0x40 [ 240.504696] [<7cdfd29f>] ? rest_init+0xa1/0xa1 [ 240.505486] 2 locks held by swapper/0/1: [ 240.506185] #0: (of_mutex){......}, at: [<7d2fa615>] of_unittest+0x975/0xdc5 [ 240.507529] #1: (of_mutex){......}, at: [<7cd3de56>] of_changeset_apply+0x12/0x2a [ 240.508948] Sending NMI to all CPUs: [ 240.509663] NMI backtrace for cpu 0 [ 240.510292] CPU: 0 PID: 13 Comm: khungtaskd Not tainted 4.6.0-rc1-00021-gb10ede0 #1 [ 240.511600] task: 78119ec0 ti: 781c2000 task.ti: 781c2000 [ 240.512537] EIP: 0060:[<7c816695>] EFLAGS: 00000046 CPU: 0 [ 240.513477] EIP is at native_apic_mem_write+0x12/0x14 [ 240.514363] EAX: ffffc300 EBX: 00000002 ECX: fffff000 EDX: 00000c00 [ 240.515365] ESI: 01000000 EDI: 00000800 EBP: 781c3eb0 ESP: 781c3eb0 [ 240.516368] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 240.517232] CR0: 80050033 CR2: 00000000 CR3: 0533c000 CR4: 00040690 [ 240.518242] Stack: [ 240.518579] 781c3ec4 7c81673c 00000001 00000002 00000202 781c3ed8 7c81699f 00000001 [ 240.519807] 7c8173ed 7d32ee40 781c3ee0 7c8173fe 781c3f04 7ca864ab 7d143dda 7d16d806 [ 240.521039] 00000001 78070040 78070040 780701d4 00000002 781c3f0c 7c81741f 781c3f30 [ 240.522307] Call Trace: [ 240.522711] [<7c81673c>] __default_send_IPI_dest_field+0x4a/0x4f [ 240.523680] [<7c81699f>] default_send_IPI_mask_logical+0x45/0x51 [ 240.524634] [<7c8173ed>] ? irq_force_complete_move+0xa3/0xa3 [ 240.525502] [<7c8173fe>] nmi_raise_cpu_backtrace+0x11/0x13 [ 240.526355] [<7ca864ab>] nmi_trigger_all_cpu_backtrace+0xcd/0x1ab [ 240.527253] [<7c81741f>] arch_trigger_all_cpu_backtrace+0x10/0x12 [ 240.528044] [<7c87ec04>] watchdog+0x258/0x277 [ 240.528604] [<7c87e9ac>] ? rcu_read_lock+0x26/0x26 [ 240.529226] [<7c83f117>] kthread+0x8c/0x91 [ 240.529758] [<7ce01c11>] ret_from_kernel_thread+0x21/0x40 [ 240.530476] [<7c83f08b>] ? init_completion+0x1e/0x1e [ 240.531127] Code: 00 5d c3 55 89 e5 50 9d 8d 74 26 00 5d c3 55 89 e5 fa 90 8d 74 26 00 5d c3 8b 0d e4 32 20 7d 55 89 e5 8d 84 08 00 d0 ff ff 89 10 <5d> c3 55 8d 48 01 89 e5 53 89 d3 ba 08 00 00 00 89 d8 e8 db a3 [ 240.533488] Kernel panic - not syncing: hung_task: blocked tasks [ 240.534271] CPU: 0 PID: 13 Comm: khungtaskd Not tainted 4.6.0-rc1-00021-gb10ede0 #1 [ 240.535248] 00000000 00000046 781c3ef0 7ca834d0 78070040 780701d4 781c3f08 7c88e9c4 [ 240.536370] 780701d4 78070040 780701d4 00000002 781c3f30 7c87ec0e 7d10ba61 000003ff [ 240.537475] 00008000 00000078 78070040 7819c7a0 00000000 7c87e9ac 781c3fac 7c83f117 [ 240.538538] Call Trace: [ 240.538847] [<7ca834d0>] dump_stack+0x55/0x6e [ 240.539399] [<7c88e9c4>] panic+0x8e/0x1b2 [ 240.539899] [<7c87ec0e>] watchdog+0x262/0x277 [ 240.540454] [<7c87e9ac>] ? rcu_read_lock+0x26/0x26 [ 240.541054] [<7c83f117>] kthread+0x8c/0x91 [ 240.541566] [<7ce01c11>] ret_from_kernel_thread+0x21/0x40 [ 240.542239] [<7c83f08b>] ? init_completion+0x1e/0x1e [ 240.542923] Kernel Offset: 0x3800000 from 0x79000000 (relocation range: 0x78000000-0x887dffff) Elapsed time: 250 git bisect start 6b61c6f1e2fcb6fdbaabbaebcd5aa5413950af52 f55532a0c0b8bb6148f4e07853b876ef73bc69ca -- git bisect bad 8ab8170b4a2ab779e65115c7e0fb7304a084cd6a # 23:44 0- 22 Merge 'linux-review/Bjorn-Andersson/Misc-wcn36xx-fixes/20160329-141847' into devel-spot-201603292238 git bisect bad 612de1828577d83df596506f1fdcd6e44bf750c8 # 23:54 0- 20 Merge 'krzk/for-next' into devel-spot-201603292238 git bisect bad 0b142b830f14a6229e5329dff253357d9459ffd8 # 00:04 0- 12 Merge 'drm-intel/for-linux-next' into devel-spot-201603292238 git bisect bad 400904dbbd499d853ebd44b1e3f3ae34ad3f15b7 # 00:12 0- 22 Merge 'renesas-drivers/topic/ipmmu-CONFIG_IOMMU_DMA-update-v1' into devel-spot-201603292238 git bisect good ce0870dcdea9972c5d0db9d73f9f5cd2e2eb0c37 # 00:38 21+ 1 Merge 'at91/at91-4.7-dt' into devel-spot-201603292238 git bisect good de9225284cae3f3a2c0faf4822d59c6755290cd2 # 00:45 22+ 2 Merge 'linux-review/Anand-Jain/btrfs-Introduce-a-new-function-to-check-if-all-chunks-a-OK-for-degraded-mount/20160329-222724' into devel-spot-201603292238 git bisect bad 55034431c69bb703404f3e14266488b6eea919fa # 01:03 0- 24 Merge 'renesas-drivers/topic/renesas-overlays' into devel-spot-201603292238 git bisect good feb544ca29eac30353d8ed85fd1b3df46465c2f3 # 01:17 22+ 0 doc: dt: Document the indirect overlay method. git bisect good b1db22b3c3967975e45e752af79b2d5207c835dd # 01:24 22+ 0 of: remove bogus return in of_core_init git bisect bad b290331f323a61cf89ecb429b4ce1169d157642a # 01:37 0- 12 of: rename *_node_sysfs to _node_post git bisect bad b10ede0662892492fa3a9bdcdbf81152042b4dac # 01:53 0- 22 of: unittest: changeset helpers git bisect good d82232727c0ce5e3c924427269f4ec0a90480a4f # 02:05 22+ 1 of: Maintainer fixes for dynamic # first bad commit: [b10ede0662892492fa3a9bdcdbf81152042b4dac] of: unittest: changeset helpers git bisect good d82232727c0ce5e3c924427269f4ec0a90480a4f # 02:08 61+ 2 of: Maintainer fixes for dynamic # extra tests with DEBUG_INFO git bisect bad b10ede0662892492fa3a9bdcdbf81152042b4dac # 02:24 0- 39 of: unittest: changeset helpers # extra tests on HEAD of linux-devel/devel-spot-201603292238 git bisect bad 6b61c6f1e2fcb6fdbaabbaebcd5aa5413950af52 # 02:24 0- 60 0day head guard for 'devel-spot-201603292238' # extra tests on tree/branch renesas-drivers/topic/renesas-overlays git bisect bad 818b8b8d514620605b61de94954a2485d91eb9ee # 02:42 0- 30 arm64: dts: salvator-x: Add overlay for polled GPIO keyboard # extra tests with first bad commit reverted git bisect good ed19fa40c764b3a377fc4b55594468a0c3a7c7ef # 02:50 66+ 1 Revert "of: unittest: changeset helpers" # extra tests on tree/branch linus/master git bisect good 1993b176a8224e371e0732ffada7ab9eb3b0912b # 02:56 66+ 1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide # extra tests on tree/branch linux-next/master git bisect good 682b9318d46d7336ab5b13c90dfdbbd33d8c629e # 05:31 66+ 4 Add linux-next specific files for 20160329 This script may reproduce the error. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=yocto-minimal-i386.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$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