From: Kuniyuki Iwashima <kuniyu@amazon.com>
To: <pengfei.xu@intel.com>
Cc: <davem@davemloft.net>, <dumazet@google.com>, <kuba@kernel.org>,
<kuni1840@gmail.com>, <kuniyu@amazon.com>,
<linux-kernel@vger.kernel.org>, <lkp@intel.com>,
<netdev@vger.kernel.org>, <pabeni@redhat.com>
Subject: Re: [Syzkaller & bisect] There is BUG: soft lockup after sendmsg syscall in v6.8-rc4
Date: Tue, 20 Feb 2024 21:41:54 -0800 [thread overview]
Message-ID: <20240221054154.51749-1-kuniyu@amazon.com> (raw)
In-Reply-To: <ZdVgLbuAYGKoDzpS@xpf.sh.intel.com>
From: Pengfei Xu <pengfei.xu@intel.com>
Date: Wed, 21 Feb 2024 10:30:05 +0800
> Hi Kuniyuki Iwashima and kernel experts,
>
> Greeting!
> There is BUG: soft lockup after sendmsg syscall in v6.8-rc4 in guest.
>
> All detailed info: https://github.com/xupengfe/syzkaller_logs/tree/main/240220_161242_softlockup
> Syzkaller reproduced code: https://github.com/xupengfe/syzkaller_logs/blob/main/240220_161242_softlockup/repro.c
> Syzkaller syscall reproduced steps: https://github.com/xupengfe/syzkaller_logs/blob/main/240220_161242_softlockup/repro.prog
> Kconfig(need make olddefconfig): https://github.com/xupengfe/syzkaller_logs/blob/main/240220_161242_softlockup/kconfig_origin
> Bisect info: https://github.com/xupengfe/syzkaller_logs/blob/main/240220_161242_softlockup/bisect_info.log
> v6.8-rc4 issue dmesg: https://github.com/xupengfe/syzkaller_logs/blob/main/240220_161242_softlockup/841c35169323cd833294798e58b9bf63fa4fa1de_dmesg.log
> bzImage_v6.8-rc4: https://github.com/xupengfe/syzkaller_logs/raw/main/240220_161242_softlockup/bzImage_v6.8-rc4.tar.gz
>
> Bisected and found first bad commit:
> "
> 1279f9d9dec2 af_unix: Call kfree_skb() for dead unix_(sk)->oob_skb in GC.
> "
Thanks for the report.
I think syzbot reported the same issue.
https://syzkaller.appspot.com/bug?extid=ecab4d36f920c3574bf9
Could you try this patch ?
https://lore.kernel.org/netdev/20240219174657.6047-1-kuniyu@amazon.com/
next prev parent reply other threads:[~2024-02-21 5:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-21 2:30 [Syzkaller & bisect] There is BUG: soft lockup after sendmsg syscall in v6.8-rc4 Pengfei Xu
2024-02-21 3:07 ` Jason Xing
2024-02-21 5:29 ` Pengfei Xu
2024-02-21 5:41 ` Kuniyuki Iwashima [this message]
2024-02-21 7:10 ` Pengfei Xu
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