syzbot has bisected this bug to: commit ab92d68fc22f9afab480153bd82a20f6e2533769 Author: Taehee Yoo <ap420073 at gmail.com> Date: Mon Oct 21 18:47:51 2019 +0000 net: core: add generic lockdep keys bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15e88ec6e00000 start commit: 36487907 Merge branch 'akpm' (patches from Andrew) git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=17e88ec6e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13e88ec6e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=f2f3ef188b7e16cf dashboard link: https://syzkaller.appspot.com/bug?extid=4ec99438ed7450da6272 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1722c5c1e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=167aee3ee00000 Reported-by: syzbot+4ec99438ed7450da6272 at syzkaller.appspotmail.com Fixes: ab92d68fc22f ("net: core: add generic lockdep keys") For information about bisection process see: https://goo.gl/tpsmEJ#bisection