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=17d0c611e00000
start commit: 131701c6 Merge tag 'leds-5.5-rc8' of git://git.kernel.org/..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=1430c611e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1030c611e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=83c00afca9cf5153
dashboard link: https://syzkaller.appspot.com/bug?extid=b96275fd6ad891076ced
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15fba721e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1339726ee00000
Reported-by: syzbot+b96275fd6ad891076ced@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: b9a1e627405d ("hsr: implement dellink to clean up resources")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
