From: Ming Lei <ming.lei@redhat.com>
To: Martin Svec <martin.svec@zoner.cz>
Cc: linux-block@vger.kernel.org
Subject: Re: NULL pointer dereference in blk_mq_put_rq_ref (LTS kernel 5.10.56)
Date: Tue, 31 Aug 2021 17:33:55 +0800 [thread overview]
Message-ID: <YS33g6bLXCeB7Pue@T590> (raw)
In-Reply-To: <1706c570-6c07-4eb7-219f-de3366e54077@zoner.cz>
On Mon, Aug 30, 2021 at 04:52:54PM +0200, Martin Svec wrote:
> Hi all,
>
> after upgrade from 5.4.x to 5.10.56 one of our LIO iSCSI Target servers hung
> with kernel NULL pointer dereference bug, see below. According to the call trace
> I guess that the bug is related to the generic blk-mq subsystem. I don't see any
> fixes related to blk-mq between 5.10.56 and 5.10.60, so this bug probably occurs
> in latest 5.10 stable releases too. I this a known issue or do you have any ideas
> what's wrong?
The issue should have been fixed by the following two patches:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a9ed27a764156929efe714033edb3e9023c5f321
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c2da19ed50554ce52ecbad3655c98371fe58599f
Thanks,
Ming
next prev parent reply other threads:[~2021-08-31 9:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-30 14:52 NULL pointer dereference in blk_mq_put_rq_ref (LTS kernel 5.10.56) Martin Svec
2021-08-31 9:33 ` Ming Lei [this message]
2021-08-31 10:30 ` Martin Svec
2021-09-01 1:35 ` Ming Lei
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