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([2620:10d:c092:600::1:6814]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aac0efe497dsm2131382166b.132.2025.01.05.05.51.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 05 Jan 2025 05:51:33 -0800 (PST) Message-ID: Date: Sun, 5 Jan 2025 13:52:29 +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 in __io_submit_flush_completions From: Pavel Begunkov To: syzbot , axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <6765b448.050a0220.15b956.00d4.GAE@google.com> <62983fd8-d5f6-470e-88e2-6f4737bfed79@gmail.com> Content-Language: en-US In-Reply-To: <62983fd8-d5f6-470e-88e2-6f4737bfed79@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 12/24/24 13:57, Pavel Begunkov wrote: > On 12/20/24 18:15, syzbot wrote: >> >> HEAD commit:    8faabc041a00 Merge tag 'net-6.13-rc4' of git://git.kernel... >> git tree:       upstream >> console output: https://syzkaller.appspot.com/x/log.txt?x=13249e0f980000 >> kernel config:  https://syzkaller.appspot.com/x/.config?x=c22efbd20f8da769 >> dashboard link: https://syzkaller.appspot.com/bug?extid=1bcb75613069ad4957fc >> compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 >> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12172fe8580000 >> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=111f92df980000 >> >> Downloadable assets: >> disk image: https://storage.googleapis.com/syzbot-assets/0bdb6cecaf61/disk-8faabc04.raw.xz >> vmlinux: https://storage.googleapis.com/syzbot-assets/98b22dfadac0/vmlinux-8faabc04.xz >> kernel image: https://storage.googleapis.com/syzbot-assets/65a511d3ba7f/bzImage-8faabc04.xz >> >> IMPORTANT: if you fix the issue, please add the following tag to the commit: >> Reported-by: syzbot+1bcb75613069ad4957fc@syzkaller.appspotmail.com > > I can't reproduce but it makes sense. It shouldn't be a real > problem as it's protected by ->uring_lock #syz test: https://github.com/isilence/linux.git syz/get-cqe-lockdep -- Pavel Begunkov