syzbot has bisected this issue to:

commit b9df4fd7e99cb8bfd80c4143f3045d63b1754ad0 Author: Heiner Kallweit hkallweit1@gmail.com Date: Sun Oct 6 16:19:54 2019 +0000

net: core: change return type of pskb_may_pull to bool

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11b4545cd00000 start commit: 1048ba83 Linux 5.11-rc6 git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=13b4545cd00000 console output: https://syzkaller.appspot.com/x/log.txt?x=15b4545cd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=3ae5569643a9955f dashboard link: https://syzkaller.appspot.com/bug?extid=105896fac213f26056f9 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16f0e564d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=147075e8d00000

Reported-by: syzbot+105896fac213f26056f9@syzkaller.appspotmail.com Fixes: b9df4fd7e99c ("net: core: change return type of pskb_may_pull to bool")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection