linux-kernel - Re: [PATCH net] net: wwan: iosm: Fix tainted pointer delete is case of region creation fail

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Message-ID: <20240605185848.GV791188@kernel.org>
Date: Wed, 5 Jun 2024 19:58:48 +0100
From: Simon Horman <horms@...nel.org>
To: Aleksandr Mishin <amishin@...rgos.ru>
Cc: M Chetan Kumar <m.chetan.kumar@...el.com>,
	Loic Poulain <loic.poulain@...aro.org>,
	Sergey Ryazanov <ryazanov.s.a@...il.com>,
	Johannes Berg <johannes@...solutions.net>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	lvc-project@...uxtesting.org
Subject: Re: [PATCH net] net: wwan: iosm: Fix tainted pointer delete is case
 of region creation fail

On Tue, Jun 04, 2024 at 11:25:00AM +0300, Aleksandr Mishin wrote:
> In case of region creation fail in ipc_devlink_create_region(), previously
> created regions delete process starts from tainted pointer which actually
> holds error code value.
> Fix this bug by decreasing region index before delete.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: 4dcd183fbd67 ("net: wwan: iosm: devlink registration")
> Signed-off-by: Aleksandr Mishin <amishin@...rgos.ru>

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