syzbot has bisected this bug to:

commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668 Author: Cong Wang xiyou.wangcong@gmail.com Date: Thu Jul 4 00:21:13 2019 +0000

hsr: implement dellink to clean up resources

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=123fce01e00000 start commit: 4703d911 Merge tag 'xarray-5.5' of git://git.infradead.org.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=113fce01e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=163fce01e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=83c00afca9cf5153 dashboard link: https://syzkaller.appspot.com/bug?extid=a85062dec5d65617cc1c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1301ed85e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14b7b79ee00000

Reported-by: syzbot+a85062dec5d65617cc1c@syzkaller.appspotmail.com Fixes: b9a1e627405d ("hsr: implement dellink to clean up resources")

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