linux-kernel - Re: [syzbot] [io-uring?] WARNING: refcount bug in io_send_zc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <fde4a18e-0376-4c3f-9b27-b644c211618e@gmail.com>
Date: Sat, 22 Mar 2025 09:04:58 +0000
From: Pavel Begunkov <asml.silence@...il.com>
To: syzbot <syzbot+cf285a028ffba71b2ef5@...kaller.appspotmail.com>,
 axboe@...nel.dk, io-uring@...r.kernel.org, linux-kernel@...r.kernel.org,
 syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [io-uring?] WARNING: refcount bug in io_send_zc_cleanup
 (2)

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@...kaller.appspotmail.com

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


-- 
Pavel Begunkov