linux-kernel - Re: [blktest/nvme/058] Kernel OOPs while running nvme/058 tests

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Message-ID: <aK15dbUiEyr0O2Ka@fedora>
Date: Tue, 26 Aug 2025 17:08:05 +0800
From: Ming Lei <ming.lei@...hat.com>
To: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
Cc: LKML <linux-kernel@...r.kernel.org>, linux-nvme@...ts.infradead.org,
	Nilay Shroff <nilay@...ux.ibm.com>, linux-block@...r.kernel.org
Subject: Re: [blktest/nvme/058] Kernel OOPs while running nvme/058 tests

On Tue, Aug 26, 2025 at 02:00:56PM +0530, Venkat Rao Bagalkote wrote:
> Greetings!!!
> 
> 
> IBM CI has reported a kernel OOPs, while running blktest suite(nvme/058
> test).
> 
> 
> Kernel Repo:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> 
> 
> Traces:
> 
> 
> [37496.800225] BUG: Kernel NULL pointer dereference at 0x00000000
> [37496.800230] Faulting instruction address: 0xc0000000008a34b0
> [37496.800235] Oops: Kernel access of bad area, sig: 11 [#1]

...

> [37496.800365] GPR28: 0000000000000001 0000000000000001 c0000000b005c400
> 0000000000000000
> [37496.800424] NIP [c0000000008a34b0] __rq_qos_done_bio+0x3c/0x88

It looks regression from 370ac285f23a ("block: avoid cpu_hotplug_lock depedency on freeze_lock"),
For nvme mpath, same bio crosses two drivers, so QUEUE_FLAG_QOS_ENABLED & q->rq_qos check can't
be skipped.


Thanks,
Ming