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Wed, 21 Jan 2026 09:41:15 -0800 (PST) Message-ID: Date: Wed, 21 Jan 2026 10:41:14 -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 From: Jens Axboe Subject: Re: [syzbot] [io-uring?] INFO: task hung in io_wq_put_and_exit (6) To: syzbot , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <68a2decc.050a0220.e29e5.0099.GAE@google.com> <7aa47c41-df51-4a9a-b021-866ea1bacb7b@kernel.dk> Content-Language: en-US In-Reply-To: <7aa47c41-df51-4a9a-b021-866ea1bacb7b@kernel.dk> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 1/20/26 8:04 AM, Jens Axboe wrote: > Just to wrap this one up - there's a fairly lengthy explanation posted > here: > > https://lore.kernel.org/io-uring/937c3e38-368e-43eb-9d7e-2dcc0697799f@kernel.dk/ > > which details why this isn't really a bug, it's just slow exit due to > the odd huge reads (and number of them) syzbot queues up with io_uring > before exiting. Let's try the syzbot special work-around: #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git syztest -- Jens Axboe