From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: Re: possible deadlock in mnt_want_write Date: Fri, 22 Nov 2019 18:27:00 -0800 Message-ID: <000000000000ebac4d0597fa4340@google.com> References: <000000000000d03eea0571adfe83@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Return-path: In-Reply-To: <000000000000d03eea0571adfe83@google.com> Sender: linux-kernel-owner@vger.kernel.org To: amir73il@gmail.com, ast@kernel.org, dvyukov@google.com, linux-fsdevel@vger.kernel.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, mszeredi@redhat.com, rgoldwyn@suse.de, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, zohar@linux.ibm.com, zohar@linux.vnet.ibm.com List-Id: linux-unionfs@vger.kernel.org syzbot has bisected this bug to: commit 8e54cadab447dae779f80f79c87cbeaea9594f60 Author: Al Viro Date: Sun Nov 27 01:05:42 2016 +0000 fix default_file_splice_read() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15147a36e00000 start commit: 6d906f99 Merge tag 'arm64-fixes' of git://git.kernel.org/p.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=17147a36e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13147a36e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=856fc6d0fbbeede9 dashboard link: https://syzkaller.appspot.com/bug?extid=ae82084b07d0297e566b syz repro: https://syzkaller.appspot.com/x/repro.syz?x=111767b7200000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1611ab2d200000 Reported-by: syzbot+ae82084b07d0297e566b@syzkaller.appspotmail.com Fixes: 8e54cadab447 ("fix default_file_splice_read()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection