From: Minchan Kim <minchan@kernel.org>
To: lkp@lists.01.org
Subject: Re: [mm] fc80cee1c5: EIP is at show_free_areas+0x496/0xe69
Date: Tue, 19 Jul 2016 12:13:53 +0900 [thread overview]
Message-ID: <20160719031353.GA17713@bbox> (raw)
In-Reply-To: <20160719022006.GC13203@yexl-desktop>
[-- Attachment #1: Type: text/plain, Size: 6845 bytes --]
On Tue, Jul 19, 2016 at 10:20:06AM +0800, kernel test robot wrote:
>
> FYI, we noticed the following commit:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git mm-vmscan-node-lru-follow-up-v2r1
> commit fc80cee1c58837ff9c6e8aa4bbee480b337cb47a ("mm: show node_pages_scanned per node, not zone")
>
> in testcase: boot
>
> on test machine: 1 threads qemu-system-i386 -enable-kvm with 192M memory
>
> caused below changes:
>
>
> BUG: unable to handle kernel NULL pointer dereference at 00000020
> IP: [<411da4cf>] show_free_areas+0x496/0xe69
> *pdpt = 000000000ba70001 *pde = 0000000000000000
> Oops: 0000 [#1] PREEMPT SMP
> Modules linked in:
> CPU: 0 PID: 10415 Comm: trinity-c0 Not tainted 4.7.0-rc7-mm1-00362-gfc80cee #1
> task: 4bb54140 ti: 4ba3e000 task.ti: 4ba3e000
> EIP: 0060:[<411da4cf>] EFLAGS: 00010216 CPU: 0
> EIP is at show_free_areas+0x496/0xe69
> EAX: 41cfbb8f EBX: 4ad4e000 ECX: 410abdfe EDX: 00000007
> ESI: 00000000 EDI: 41cec5a9 EBP: 4ba3f9d4 ESP: 4ba3f944
> DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
> CR0: 80050033 CR2: 00000020 CR3: 0a3b1740 CR4: 000006b0
> Stack:
> 4ba3f954 00000027 00000001 00000000 000007b0 00000000 0000003e 00002932
> 00002673 000005ee 00000fd2 00000000 00000000 00000000 0000514a 00000000
> 4ba3f9a8 410ee219 00000000 00ab44b5 00000246 00000000 410ee34e 00000000
> Call Trace:
> [<410ee219>] ? vprintk_emit+0x4c0/0x4ca
> [<410ee34e>] ? devkmsg_write+0x113/0x113
> [<410ee35f>] ? vprintk_default+0x11/0x13
> [<4159aef8>] show_mem+0x1c/0x162
> [<41268e8c>] ? dump_header+0x8c/0x413
> [<41268ed5>] dump_header+0xd5/0x413
> [<410abdfe>] ? preempt_count_sub+0x84/0xa3
> [<41ab3dac>] ? _raw_spin_unlock_irqrestore+0x4a/0x5d
> [<41597fc6>] ? ___ratelimit+0x270/0x27a
> [<411d171e>] oom_kill_process+0x66/0x57f
> [<411d06ba>] ? rcu_read_unlock+0x53/0x6a
> [<411d2212>] out_of_memory+0x57c/0x5a5
> [<411d961f>] __alloc_pages_slowpath+0xca0/0xda1
> [<411d98eb>] __alloc_pages_nodemask+0x1cb/0x3cf
> [<4123f34e>] alloc_pages_vma+0xce/0xd7
> [<411f055e>] shmem_alloc_page+0x61/0x75
> [<410dddec>] ? mark_held_locks+0xd2/0xe5
> [<411f05e5>] ? i_size_read+0x73/0xf4
> [<410de074>] ? trace_hardirqs_on_caller+0x275/0x2aa
> [<411f46bc>] shmem_getpage_gfp+0x4f2/0xa16
> [<411f4ecf>] shmem_fault+0x2ef/0x30d
> [<410e0719>] ? lock_release+0x282/0x735
> [<4120e588>] __do_fault+0xfe/0x159
> [<41215cc7>] handle_mm_fault+0xce0/0xfbb
> [<41059ef8>] __do_page_fault+0x3ae/0x6ae
> [<41056433>] ? kvm_async_pf_task_wake+0x16e/0x16e
> [<4105a3be>] trace_do_page_fault+0x1a7/0x307
> [<41056433>] ? kvm_async_pf_task_wake+0x16e/0x16e
> [<41056433>] ? kvm_async_pf_task_wake+0x16e/0x16e
> [<41056456>] do_async_page_fault+0x23/0x49
> [<41ab51e2>] error_code+0x42/0x50
> [<4106007b>] ? pgd_alloc+0x27d/0x3cb
> [<415aef2b>] ? copy_page_to_iter+0x189/0x443
> [<4122a296>] process_vm_rw_core+0x3d0/0x4e3
> [<4126c11e>] ? copy_from_user+0x28/0x2d
> [<4126f324>] ? rw_copy_check_uvector+0x5b/0x189
> [<4122a44c>] process_vm_rw+0xa3/0xce
> [<41184965>] ? trace_preempt_on+0xa/0x17
> [<410abdfe>] ? preempt_count_sub+0x84/0xa3
> [<410db8f1>] ? lock_is_held+0x9b/0xa2
> [<41190890>] ? ftrace_syscall_enter+0x1e2/0x1e2
> [<41102bb8>] ? rcu_read_lock_sched_held+0x50/0x58
> [<41001b48>] ? syscall_trace_enter+0x2c1/0x3d9
> [<410e0719>] ? lock_release+0x282/0x735
> [<410e03d1>] ? lock_acquire+0x16e/0x234
> [<4122a477>] ? process_vm_rw+0xce/0xce
> [<4122a493>] SyS_process_vm_readv+0x1c/0x1e
> [<41002689>] do_fast_syscall_32+0x17f/0x229
> [<41ab4433>] sysenter_past_esp+0x4c/0x7f
> Code: 84 7c 01 00 00 89 d8 e8 40 f8 00 00 bf 8f c5 ce 41 84 c0 75 05 bf a9 c5 ce 41 31 d2 b8 34 11 ee 41 e8 aa 8f 3f 00 ba 07 00 00 00 <a1> 20 00 00 00 e8 20 1e 02 00 89 c6 ba 15 00 00 00 89 d8 e8 12
> EIP: [<411da4cf>] show_free_areas+0x496/0xe69 SS:ESP 0068:4ba3f944
> CR2: 0000000000000020
> ---[ end trace 1dabbaed7530bfe7 ]---
>
>
It's known problem and Andrew already picked it to his tree.
Thanks.
https://lkml.org/lkml/2016/7/16/56
prev parent reply other threads:[~2016-07-19 3:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-19 2:20 [mm] fc80cee1c5: EIP is at show_free_areas+0x496/0xe69 kernel test robot
2016-07-19 3:13 ` Minchan Kim [this message]
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