netdev - Re: [PATCH net] net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed

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Date:   Thu, 03 Feb 2022 05:10:08 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     davem@...emloft.net, kuba@...nel.org, roopa@...dia.com,
        edumazet@...gle.com, dsahern@...nel.org, john.fastabend@...il.com,
        netdev@...r.kernel.org,
        syzbot+5239d0e1778a500d477a@...kaller.appspotmail.com
Subject: Re: [PATCH net] net,
 neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Tue,  1 Feb 2022 20:39:42 +0100 you wrote:
> syzkaller was able to trigger a deadlock for NTF_MANAGED entries [0]:
> 
>   kworker/0:16/14617 is trying to acquire lock:
>   ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652
>   [...]
>   but task is already holding lock:
>   ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572
> 
> [...]

Here is the summary with links:
  - [net] net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work
    https://git.kernel.org/netdev/net/c/4a81f6da9cb2

You are awesome, thank you!
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