linux-kernel - Re: [PATCH] pNFS: Fix uninited ptr access in ext_tree_encode

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Message-ID: <bdcfa3cf-1e48-4680-a114-565704efe8e6@mandelbit.com>
Date: Thu, 17 Jul 2025 16:37:56 +0200
From: Antonio Quartulli <antonio@...delbit.com>
To: Sergey Bashirov <sergeybashirov@...il.com>,
 Trond Myklebust <trondmy@...nel.org>, Anna Schumaker <anna@...nel.org>,
 Dan Carpenter <dan.carpenter@...aro.org>
Cc: linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pNFS: Fix uninited ptr access in ext_tree_encode_commit

On 17/07/2025 16:34, Sergey Bashirov wrote:
> Current implementation of the function assumes that the provided buffer
> can always accommodate at least one encoded extent. This patch adds
> handling of all theoretically possible values of be_prev, so that
> ext_tree_encode_commit makes no assumptions about the provided buffer
> size, and static checks pass without warnings.
> 
> Fixes: d84c4754f874 ("pNFS: Fix extent encoding in block/scsi layout")
> Addresses-Coverity-ID: 1647611 ("Memory - illegal accesses  (UNINIT)")
> Signed-off-by: Sergey Bashirov <sergeybashirov@...il.com>

Acked-by: Antonio Quartulli <antonio@...delbit.com>

Thanks a lot!
Regards,


-- 
Antonio Quartulli

CEO and Co-Founder
Mandelbit Srl
https://www.mandelbit.com