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Thu, 04 Dec 2025 20:05:17 -0800 (PST) Message-ID: <9f1d144a-56b8-481a-bfdc-409f3b7e7e3a@kernel.dk> Date: Thu, 4 Dec 2025 21:05:15 -0700 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] Monthly io-uring report (Dec 2025) To: syzbot , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <693213bc.a70a0220.2ea503.00ea.GAE@google.com> Content-Language: en-US From: Jens Axboe In-Reply-To: <693213bc.a70a0220.2ea503.00ea.GAE@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 12/4/25 4:05 PM, syzbot wrote: > Hello io-uring maintainers/developers, > > This is a 31-day syzbot report for the io-uring subsystem. > All related reports/information can be found at: > https://syzkaller.appspot.com/upstream/s/io-uring > > During the period, 1 new issues were detected and 1 were fixed. > In total, 3 issues are still open and 128 have already been fixed. > > Some of the still happening issues: > > Ref Crashes Repro Title > <1> 4212 No WARNING in io_ring_exit_work (2) > https://syzkaller.appspot.com/bug?extid=557a278955ff3a4d3938 > <2> 46 Yes INFO: task hung in io_wq_put_and_exit (6) > https://syzkaller.appspot.com/bug?extid=4eb282331cab6d5b6588 FWIW, I think we'll keep hitting variants of this, as syzbot tests with tons of debugging enabled (for good reason), which slows things down a _lot_. Then it floods the ring with work, and cancelation/exit can then take a long time. Whenever I've tested these reproducers, they finish quite quick. Until you enable all the gunk and run it on a slow CPU or two. Hence not a real bug imho. -- Jens Axboe