Re: [syzbot] [io-uring?] WARNING: refcount bug in io_send_zc_cleanup (2)

Pavel Begunkov
2025-03-22T09:04:07Z

On 3/22/25 07:06, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: d07de43e3f05 Merge tag 'io_uring-6.14-20250321' of git://g..
> git tree: upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=14223004580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=620facf12ff15d10
> dashboard link: https://syzkaller.appspot.com/bug?extid=cf285a028ffba71b2ef5
> 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=16be1c4c580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12223004580000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/a241563b93db/disk-d07de43e.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/6c435395db14/vmlinux-d07de43e.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/59fc4b510cae/bzImage-d07de43e.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+cf285a028ffba71b2ef5@syzkaller.appspotmail.com

#syz test: https://github.com/isilence/linux.git syz/sendzc-cleanup

--
Pavel Begunkov