netdev - Re: [PATCH v2 net] net: nfc: llcp: Add lock when modifying device list

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Date: Sat, 30 Sep 2023 15:19:03 +0200
From: Simon Horman <horms@...nel.org>
To: Jeremy Cline <jeremy@...ine.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Lin Ma <linma@....edu.cn>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	syzbot+c1d0a03d305972dbbe14@...kaller.appspotmail.com
Subject: Re: [PATCH v2 net] net: nfc: llcp: Add lock when modifying device
 list

On Mon, Sep 25, 2023 at 03:23:51PM -0400, Jeremy Cline wrote:
> The device list needs its associated lock held when modifying it, or the
> list could become corrupted, as syzbot discovered.
> 
> Reported-and-tested-by: syzbot+c1d0a03d305972dbbe14@...kaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=c1d0a03d305972dbbe14
> Fixes: 6709d4b7bc2e ("net: nfc: Fix use-after-free caused by nfc_llcp_find_local")
> Signed-off-by: Jeremy Cline <jeremy@...ine.org>

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