linux-kernel - Re: [PATCH 3/5] 9p: virtio: make sure 'offs' is initialized in zc

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Message-ID: <ZFEr4X1s4dVgr+Vg@corigine.com>
Date:   Tue, 2 May 2023 17:27:29 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Dominique Martinet <asmadeus@...ewreck.org>
Cc:     Eric Van Hensbergen <ericvh@...il.com>,
        Latchesar Ionkov <lucho@...kov.net>,
        Christian Schoenebeck <linux_oss@...debyte.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, v9fs@...ts.linux.dev,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 3/5] 9p: virtio: make sure 'offs' is initialized in
 zc_request

On Thu, Apr 27, 2023 at 08:23:36PM +0900, Dominique Martinet wrote:
> Similarly to the previous patch: offs can be used in handle_rerrors
> without initializing on small payloads; in this case handle_rerrors will
> not use it because of the size check, but it doesn't hurt to make sure
> it is zero to please scan-build.
> 
> This fixes the following warning:
> net/9p/trans_virtio.c:539:3: warning: 3rd function call argument is an uninitialized value [core.CallAndMessage]
>                 handle_rerror(req, in_hdr_len, offs, in_pages);
>                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Signed-off-by: Dominique Martinet <asmadeus@...ewreck.org>

Reviewed-by: Simon Horman <simon.horman@...igine.com>