netdev - Re: [PATCH v1 net] af_unix: Drop oob_skb ref before purging queue in GC.

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Message-Id: 
 <170851982710.28838.13826338277536240420.git-patchwork-notify@kernel.org>
Date: Wed, 21 Feb 2024 12:50:27 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Kuniyuki Iwashima <kuniyu@...zon.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, kuni1840@...il.com, netdev@...r.kernel.org,
 syzbot+ecab4d36f920c3574bf9@...kaller.appspotmail.com
Subject: Re: [PATCH v1 net] af_unix: Drop oob_skb ref before purging queue in GC.

Hello:

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

On Mon, 19 Feb 2024 09:46:57 -0800 you wrote:
> syzbot reported another task hung in __unix_gc().  [0]
> 
> The current while loop assumes that all of the left candidates
> have oob_skb and calling kfree_skb(oob_skb) releases the remaining
> candidates.
> 
> However, I missed a case that oob_skb has self-referencing fd and
> another fd and the latter sk is placed before the former in the
> candidate list.  Then, the while loop never proceeds, resulting
> the task hung.
> 
> [...]

Here is the summary with links:
  - [v1,net] af_unix: Drop oob_skb ref before purging queue in GC.
    https://git.kernel.org/netdev/net/c/aa82ac51d633

You are awesome, thank you!
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