syzbot has bisected this bug to: commit 9d71dd0c70099914fcd063135da3c580865e924c Author: The j1939 authors <linux-can@xxxxxxxxxxxxxxx> Date: Mon Oct 8 09:48:36 2018 +0000 can: add support of SAE J1939 protocol bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1157fb1ae00000 start commit: a99d8080 Linux 5.4-rc6 git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=1357fb1ae00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1557fb1ae00000 kernel config: https://syzkaller.appspot.com/x/.config?x=896c87b73c6fcda6 dashboard link: https://syzkaller.appspot.com/bug?extid=db4869ba599c0de9b13e syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1435c078e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=139a3542e00000 Reported-by: syzbot+db4869ba599c0de9b13e@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") For information about bisection process see: https://goo.gl/tpsmEJ#bisection