netdev - Re: [PATCH net] net: sched: ife: fix potential use-after-free

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Date: Fri, 15 Dec 2023 11:00:23 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Eric Dumazet <edumazet@...gle.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, jhs@...atatu.com,
 xiyou.wangcong@...il.com, jiri@...nulli.us, netdev@...r.kernel.org,
 eric.dumazet@...il.com, syzkaller@...glegroups.com, aahringo@...hat.com
Subject: Re: [PATCH net] net: sched: ife: fix potential use-after-free

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@...emloft.net>:

On Thu, 14 Dec 2023 11:30:38 +0000 you wrote:
> ife_decode() calls pskb_may_pull() two times, we need to reload
> ifehdr after the second one, or risk use-after-free as reported
> by syzbot:
> 
> BUG: KASAN: slab-use-after-free in __ife_tlv_meta_valid net/ife/ife.c:108 [inline]
> BUG: KASAN: slab-use-after-free in ife_tlv_meta_decode+0x1d1/0x210 net/ife/ife.c:131
> Read of size 2 at addr ffff88802d7300a4 by task syz-executor.5/22323
> 
> [...]

Here is the summary with links:
  - [net] net: sched: ife: fix potential use-after-free
    https://git.kernel.org/netdev/net/c/19391a2ca98b

You are awesome, thank you!
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