linux-kernel - Re: [PATCH] block: Fix uninitialized symbol 'bio' in blk_rq_prep

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Message-ID: <Zv_eFIjstVns-ebG@infradead.org>
Date: Fri, 4 Oct 2024 05:22:44 -0700
From: Christoph Hellwig <hch@...radead.org>
To: SurajSonawane2415 <surajsonawane0215@...il.com>
Cc: axboe@...nel.dk, linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block: Fix uninitialized symbol 'bio' in
 blk_rq_prep_clone

On Fri, Oct 04, 2024 at 03:38:42PM +0530, SurajSonawane2415 wrote:
> Fix the uninitialized symbol 'bio' in the function blk_rq_prep_clone
> to resolve the following error:
> block/blk-mq.c:3199 blk_rq_prep_clone() error: uninitialized symbol 'bio'.
> 
> Initialize 'bio' to NULL to prevent undefined behavior from uninitialized
> access and safe cleanup in case of failure.

Please explain how bio could be used uninitialized in this function.