Re: WARNING: refcount bug in igmp_start_timer

[syzbot]

syzbot suspects this bug was fixed by commit:

commit 323ebb61e32b478e2432c5a3cbf9e2ca678a9609
Author: Edward Cree <ecree@xxxxxxxxxxxxxx>
Date:   Tue Aug 6 13:53:55 2019 +0000

    net: use listified RX for handling GRO_NORMAL skbs

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15a5452ce00000
start commit:   ae596de1 Compiler Attributes: naked can be shared
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=5fa12be50bca08d8
dashboard link: https://syzkaller.appspot.com/bug?extid=e28037ac1c96d2a86e89
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=178537da400000

If the result looks correct, please mark the bug fixed by replying with:

#syz fix: net: use listified RX for handling GRO_NORMAL skbs

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