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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pXith-002QVV-P7; Thu, 02 Mar 2023 13:23:01 +0000 Date: Thu, 2 Mar 2023 13:23:01 +0000 From: Matthew Wilcox To: syzbot Cc: akpm@linux-foundation.org, davem@davemloft.net, dvyukov@google.com, edumazet@google.com, elver@google.com, glider@google.com, hdanton@sina.com, kasan-dev@googlegroups.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [mm?] INFO: task hung in write_cache_pages (2) Message-ID: References: <000000000000e794f505f5e0029c@google.com> <00000000000099b9c905f5e9a820@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000000000099b9c905f5e9a820@google.com> X-Rspamd-Queue-Id: 8AFA74001D X-Stat-Signature: 3gphyn64fdw79uta61fj8mcbmg5nwpp5 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1677763406-909394 X-HE-Meta: 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 xr7c9ngt 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Mar 02, 2023 at 04:06:28AM -0800, syzbot wrote: > syzbot has bisected this issue to: > > commit 17bb55487988c5dac32d55a4f085e52f875f98cc > Author: Matthew Wilcox (Oracle) > Date: Tue May 17 22:12:25 2022 +0000 > > ntfs: Remove check for PageError Syzbot has bisected to the wrong commit. That code (a) isn't going to be executed by this test, since it doesn't have an ntfs image and (b) was dead. Never could have been executed. > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13fd6e54c80000 > start commit: 489fa31ea873 Merge branch 'work.misc' of git://git.kernel... > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=10036e54c80000 > console output: https://syzkaller.appspot.com/x/log.txt?x=17fd6e54c80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=cbfa7a73c540248d > dashboard link: https://syzkaller.appspot.com/bug?extid=0adf31ecbba886ab504f > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16dc6960c80000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16f39d50c80000 > > Reported-by: syzbot+0adf31ecbba886ab504f@syzkaller.appspotmail.com > Fixes: 17bb55487988 ("ntfs: Remove check for PageError") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection