syzbot has bisected this bug to:
commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668
Author: Cong Wang <xiyou.wangcong@xxxxxxxxx>
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=13ddfa85e00000
start commit: 25e73aad Merge tag 'io_uring-5.5-2020-01-16' of git://git...
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=103dfa85e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=17ddfa85e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=cfbb8fa33f49f9f3
dashboard link: https://syzkaller.appspot.com/bug?extid=df0d0f5895ef1f41a65b
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=124774c9e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15aa48d6e00000
Reported-by: syzbot+df0d0f5895ef1f41a65b@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: b9a1e627405d ("hsr: implement dellink to clean up resources")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
