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[72.132.29.68]) by smtp.gmail.com with ESMTPSA id u24sm475478pfm.85.2021.09.03.17.49.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 03 Sep 2021 17:49:14 -0700 (PDT) Subject: Re: [syzbot] general protection fault in __io_arm_poll_handler To: syzbot , asml.silence@gmail.com, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, Dmitry Vyukov References: <000000000000f0da6305cb1feacb@google.com> From: Jens Axboe Message-ID: <15a67989-9ad7-11ef-9472-8e16ca6ec11a@kernel.dk> Date: Fri, 3 Sep 2021 18:49:11 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <000000000000f0da6305cb1feacb@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 9/3/21 5:47 PM, syzbot wrote: > Hello, > > syzbot has tested the proposed patch and the reproducer did not trigger any issue: > > Reported-and-tested-by: syzbot+ba74b85fa15fd7a96437@syzkaller.appspotmail.com > > Tested on: > > commit: 31efe48e io_uring: fix possible poll event lost in mul.. > git tree: git://git.kernel.dk/linux-block for-5.15/io_uring > kernel config: https://syzkaller.appspot.com/x/.config?x=914bb805fa8e8da9 > dashboard link: https://syzkaller.appspot.com/bug?extid=ba74b85fa15fd7a96437 > compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.1 > > Note: testing is done by a robot and is best-effort only. Dmitry, I wonder if there's a way to have syzbot know about what it's testing and be able to run the pending patches for that tree? I think we're up to 4 reports now that are all just fallout from the same bug, and where a patch has been queued up for a few days. Since they all look different, I can't fault syzbot for thinking they are different, even if they have the same root cause. Any way we can make this situation better? I can't keep replying that we should test the current branch, and it'd be a shame to have a ton of dupes. -- Jens Axboe