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Sat, 22 Mar 2025 02:04:04 -0700 (PDT) Message-ID: Date: Sat, 22 Mar 2025 09:04:58 +0000 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [io-uring?] WARNING: refcount bug in io_send_zc_cleanup (2) To: syzbot , axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <67de616f.050a0220.31a16b.002b.GAE@google.com> Content-Language: en-US From: Pavel Begunkov In-Reply-To: <67de616f.050a0220.31a16b.002b.GAE@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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