On Tue, 12 Apr 2022 17:56:42 +0530 Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote: > Linux next-20220412 i386 LTP mm test case caused following kernel crash > however, test runs to complete successfully. > > ... > > [ 951.985382] __swap_info_get: Bad swap file entry 6c0373b6 > [ 951.986163] BUG: Bad page map in process oom_reaper pte:06e76c3e > pmd:0583f067 > [ 951.987098] addr:77da7000 vm_flags:00100073 anon_vma:c4e22c40 > mapping:00000000 index:77da7 > [ 951.988163] file:(null) fault:0x0 mmap:0x0 readpage:0x0 > [ 951.988850] CPU: 2 PID: 36 Comm: oom_reaper Tainted: G W > 5.18.0-rc2-next-20220412 #1 > [ 951.990034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), > BIOS 1.12.0-1 04/01/2014 > [ 951.991101] Call Trace: > [ 951.991457] dump_stack_lvl+0x44/0x57 > [ 951.991942] dump_stack+0xd/0x10 > [ 951.992371] print_bad_pte.cold+0x82/0xd9 > [ 951.992901] ? free_swap_and_cache+0x2e/0xe0 > [ 951.993475] unmap_page_range+0x6b5/0x790 > [ 951.994005] __oom_reap_task_mm+0xc0/0x140 > [ 951.994539] ? _raw_spin_lock_irqsave+0x28/0x70 > [ 951.995128] ? trace_preempt_on+0x8/0xe0 > [ 951.995645] oom_reaper+0x28c/0x3d0 > [ 951.996103] ? __kthread_parkme+0x37/0x80 > [ 951.996626] ? trace_preempt_on+0x29/0xe0 > [ 951.997205] ? __kthread_parkme+0x37/0x80 > [ 951.997723] ? nsec_high+0xa0/0xa0 > [ 951.998174] kthread+0xe0/0x110 > [ 951.998588] ? __oom_reap_task_mm+0x140/0x140 > [ 951.999154] ? kthread_complete_and_exit+0x20/0x20 > [ 951.999771] ret_from_fork+0x1c/0x28 > [ 952.000258] Disabling lock debugging due to kernel taint > [ 952.000951] __swap_info_get: Bad swap file entry 6c0373b7 > [ 952.001779] BUG: Bad page map in process oom_reaper pte:06e76e3e > pmd:0583f067 > [ 952.002827] addr:77da8000 vm_flags:00100073 anon_vma:c4e22c40 > mapping:00000000 index:77da8 > [ 952.004010] file:(null) fault:0x0 mmap:0x0 readpage:0x0 > [ 952.004764] CPU: 2 PID: 36 Comm: oom_reaper Tainted: G B W > 5.18.0-rc2-next-20220412 #1 > [ 952.006060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), > BIOS 1.12.0-1 04/01/2014 > [ 952.007248] Call Trace: > [ 952.007611] dump_stack_lvl+0x44/0x57 > [ 952.008142] dump_stack+0xd/0x10 > [ 952.008614] print_bad_pte.cold+0x82/0xd9 > [ 952.009225] ? free_swap_and_cache+0x2e/0xe0 > [ 952.009848] unmap_page_range+0x6b5/0x790 > [ 952.010432] __oom_reap_task_mm+0xc0/0x140 > [ 952.011219] ? _raw_spin_lock_irqsave+0x28/0x70 > [ 952.011863] ? trace_preempt_on+0x8/0xe0 > [ 952.012470] oom_reaper+0x28c/0x3d0 > [ 952.013048] ? __kthread_parkme+0x37/0x80 > [ 952.013628] ? trace_preempt_on+0x29/0xe0 > [ 952.014202] ? __kthread_parkme+0x37/0x80 > [ 952.014774] ? nsec_high+0xa0/0xa0 > [ 952.015265] kthread+0xe0/0x110 > [ 952.015716] ? __oom_reap_task_mm+0x140/0x140 > [ 952.016336] ? kthread_complete_and_exit+0x20/0x20 > [ 952.017035] ret_from_fork+0x1c/0x28 > [ 952.017547] __swap_info_get: Bad swap file entry 6c0373b8 > [ 952.018368] BUG: Bad page map in process oom_reaper pte:06e7703e > pmd:0583f067 > > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> I wonder if this could be 859a85ddf90e714092de again. But the timing seems wrong. It seems repeatable. Is it possible to run a bisection search please?
