Re: [syzbot] [net?] general protection fault in add_wait_queue

Michal Luczaj
2025-02-03T12:34:14Z

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@rbox.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@syzkaller.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