linux-kernel - Re: [syzbot] [net?] general protection fault in add_wait

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Message-ID: <d2b9f0c0-33d8-43b6-85b1-0cc45e38a60b@rbox.co>
Date: Mon, 3 Feb 2025 13:33:53 +0100
From: Michal Luczaj <mhal@...x.co>
To: syzbot <syzbot+9d55b199192a4be7d02c@...kaller.appspotmail.com>,
 davem@...emloft.net, edumazet@...gle.com, eperezma@...hat.com,
 horms@...nel.org, jasowang@...hat.com, kuba@...nel.org, kvm@...r.kernel.org,
 linux-kernel@...r.kernel.org, mst@...hat.com, netdev@...r.kernel.org,
 pabeni@...hat.com, sgarzare@...hat.com, stefanha@...hat.com,
 syzkaller-bugs@...glegroups.com, virtualization@...ts.linux.dev,
 xuanzhuo@...ux.alibaba.com
Subject: Re: [syzbot] [net?] general protection fault in add_wait_queue

On 2/3/25 10:57, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    c2933b2befe2 Merge tag 'net-6.14-rc1' of git://git.kernel...
> git tree:       net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=16f676b0580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=d033b14aeef39158
> dashboard link: https://syzkaller.appspot.com/bug?extid=9d55b199192a4be7d02c
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13300b24580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12418518580000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/c7667ae12603/disk-c2933b2b.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/944ca63002c1/vmlinux-c2933b2b.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/30748115bf0b/bzImage-c2933b2b.xz
> 
> The issue was bisected to:
> 
> commit fcdd2242c0231032fc84e1404315c245ae56322a
> Author: Michal Luczaj <mhal@...x.co>
> Date:   Tue Jan 28 13:15:27 2025 +0000
> 
>     vsock: Keep the binding until socket destruction
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=148f5ddf980000
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=168f5ddf980000
> console output: https://syzkaller.appspot.com/x/log.txt?x=128f5ddf980000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+9d55b199192a4be7d02c@...kaller.appspotmail.com
> Fixes: fcdd2242c023 ("vsock: Keep the binding until socket destruction")
> 
> Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI
> ...

Let me take a look.

Michal