Re: Kernel message: BUG: Bad page state in process kworker

["Alexander V. Makartsev" <avbetev@gmail.com>]

On 13.03.2021 11:31, Michael Grant wrote:

> I'm seeing lots of errors like this in my kern.log on 2 of 3 of my
> deban Linodes running testing on Linode's provided kerne 5.10.13.  Is
> this a problem in Debian or is this a Linode issue?
>
> Mar 12 19:32:18 strange kernel: [10849.820363] BUG: Bad page state in process kworker/0:3  pfn:10902f
> Mar 12 19:32:18 strange kernel: [10849.825374] page:00000000edbc1187 refcount:-1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10902f
> Mar 12 19:32:18 strange kernel: [10849.827665] flags: 0x2ffff0000000000()
> Mar 12 19:32:18 strange kernel: [10849.828894] raw: 02ffff0000000000 dead000000000100 dead000000000122 0000000000000000
> Mar 12 19:32:18 strange kernel: [10849.830817] raw: 0000000000000000 0000000000000011 ffffffffffffffff 0000000000000000
> Mar 12 19:32:18 strange kernel: [10849.832758] page dumped because: nonzero _refcount
> Mar 12 19:32:18 strange kernel: [10849.834141] Modules linked in:
> Mar 12 19:32:18 strange kernel: [10849.835229] CPU: 0 PID: 769 Comm: kworker/0:3 Tainted: G    B             5.10.13-x86_64-linode141 #1
> Mar 12 19:32:18 strange kernel: [10849.837423] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
> Mar 12 19:32:18 strange kernel: [10849.840005] Workqueue: mm_percpu_wq drain_local_pages_wq
> Mar 12 19:32:18 strange kernel: [10849.841538] Call Trace:
> Mar 12 19:32:18 strange kernel: [10849.842620]  dump_stack+0x6d/0x88
> Mar 12 19:32:18 strange kernel: [10849.843813]  bad_page.cold.119+0x63/0x93
> Mar 12 19:32:18 strange kernel: [10849.845096]  free_pcppages_bulk+0x18e/0x6a0
> Mar 12 19:32:18 strange kernel: [10849.846423]  drain_pages_zone+0x41/0x50
> Mar 12 19:32:18 strange kernel: [10849.847740]  drain_pages+0x3c/0x50
> Mar 12 19:32:18 strange kernel: [10849.848956]  drain_local_pages_wq+0xe/0x10
> Mar 12 19:32:18 strange kernel: [10849.850282]  process_one_work+0x1fb/0x390
> Mar 12 19:32:18 strange kernel: [10849.851579]  ? process_one_work+0x390/0x390
> Mar 12 19:32:18 strange kernel: [10849.852929]  worker_thread+0x221/0x3e0
> Mar 12 19:32:18 strange kernel: [10849.854159]  ? process_one_work+0x390/0x390
> Mar 12 19:32:18 strange kernel: [10849.855648]  kthread+0x116/0x130
> Mar 12 19:32:18 strange kernel: [10849.857066]  ? kthread_park+0x80/0x80
> Mar 12 19:32:18 strange kernel: [10849.858424]  ret_from_fork+0x22/0x30
>     
    I'd say it is a Linode problem, unless you run custom kernel
    modules.
    It looks like a "memory" corruption to me and since it is
    virtualized system, you should check if host system is ok.
    Memory in quotes because this issue could be also related to a
    storage sub-system (local or network attached) of the host or VM.
    
    
-- 
With kindest regards, Alexander.

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