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Message-Id: <20240727021659.4659-1-aha310510@gmail.com>
Date: Sat, 27 Jul 2024 11:16:59 +0900
From: Jeongjun Park <aha310510@...il.com>
To: kuba@...nel.org
Cc: aha310510@...il.com,
ast@...nel.org,
bigeasy@...utronix.de,
bpf@...r.kernel.org,
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john.fastabend@...il.com,
linux-kernel@...r.kernel.org,
netdev@...r.kernel.org,
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willemdebruijn.kernel@...il.com
Subject: [PATCH net] tun: Add missing bpf_net_ctx_clear() in do_xdp_generic()
Jakub Kicinski wrote:
>
> On Fri, 26 Jul 2024 06:40:49 +0900 Jeongjun Park wrote:
> > There are cases where do_xdp_generic returns bpf_net_context without
> > clearing it. This causes various memory corruptions, so the missing
> > bpf_net_ctx_clear must be added.
> >
> > Reported-by: syzbot+44623300f057a28baf1e@...kaller.appspotmail.com
> > Fixes: fecef4cd42c6 ("tun: Assign missing bpf_net_context.")
> > Signed-off-by: Jeongjun Park <aha310510@...il.com>
>
> Also likely:
>
> Reported-by: syzbot+3c2b6d5d4bec3b904933@...kaller.appspotmail.com
> Reported-by: syzbot+707d98c8649695eaf329@...kaller.appspotmail.com
>
> Right?
Yes, both appear to be bugs with the same root cause.
Regards,
Jeongjun Park
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