netdev - Re: [PATCH RESEND net-next] net: ethtool: Fix the panic caused by dev being null when dumping coalesce

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Date: Fri, 28 Jun 2024 20:54:23 +0100
From: Simon Horman <horms@...nel.org>
To: Heng Qi <hengqi@...ux.alibaba.com>
Cc: netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Paolo Abeni <pabeni@...hat.com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Jiri Pirko <jiri@...nulli.us>,
	syzbot+e77327e34cdc8c36b7d3@...kaller.appspotmail.com
Subject: Re: [PATCH RESEND net-next] net: ethtool: Fix the panic caused by
 dev being null when dumping coalesce

On Fri, Jun 28, 2024 at 12:40:18PM +0800, Heng Qi wrote:
> syzbot reported a general protection fault caused by a null pointer
> dereference in coalesce_fill_reply(). The issue occurs when req_base->dev
> is null, leading to an invalid memory access.
> 
> This panic occurs if dumping coalesce when no device name is specified.
> 
> Fixes: f750dfe825b9 ("ethtool: provide customized dim profile management")
> Reported-by: syzbot+e77327e34cdc8c36b7d3@...kaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=e77327e34cdc8c36b7d3
> Signed-off-by: Heng Qi <hengqi@...ux.alibaba.com>
> ---
> This fix patch is re-sent to next branch instead of net branch
> because the target commit is in the next branch.

Reviewed-by: Simon Horman <horms@...nel.org>