From: Christoph Hellwig <hch@lst.de>
To: Ming Lei <ming.lei@redhat.com>
Cc: Cheyenne Wills <cheyenne.wills@gmail.com>,
linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>
Subject: Re: BUG: NULL pointer dereferenced within __blk_rq_map_sg
Date: Thu, 13 Feb 2025 07:32:14 +0100 [thread overview]
Message-ID: <20250213063214.GA20171@lst.de> (raw)
In-Reply-To: <Z61LEUdHI2Hx3bue@fedora>
On Thu, Feb 13, 2025 at 09:29:53AM +0800, Ming Lei wrote:
> Yeah, turns out oops is triggered in initializing req_iterator for
> discard req, and the following patch should be enough:
How do we end up in blk_rq_map_sg for a discard request here?
dma-mapping doesn't make sense for a non-special pyaload discard
as used by xxen-blkfront, and xen-blkfront also only calls
blk_rq_map_sg from blkif_queue_rw_req and not blkif_queue_discard_req.
next prev parent reply other threads:[~2025-02-13 6:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-08 2:09 BUG: NULL pointer dereferenced within __blk_rq_map_sg Cheyenne Wills
2025-02-11 12:13 ` Ming Lei
2025-02-11 15:28 ` Ming Lei
2025-02-12 23:24 ` Cheyenne Wills
2025-02-13 1:29 ` Ming Lei
2025-02-13 6:32 ` Christoph Hellwig [this message]
2025-02-13 6:38 ` Christoph Hellwig
2025-02-13 12:39 ` Cheyenne Wills
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