Re: KASAN: slab-out-of-bounds Read in bitmap_ipmac_gc

[syzbot]

syzbot has bisected this bug to:

commit 0d581ba311a27762fe1a14e5db5f65d225b3d844
Author: Yonglong Liu <liuyonglong@xxxxxxxxxx>
Date:   Wed Jul 3 11:12:30 2019 +0000

    net: hns: add support for vlan TSO

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16d5dfaee00000
start commit:   def9d278 Linux 5.5-rc7
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=15d5dfaee00000
console output: https://syzkaller.appspot.com/x/log.txt?x=11d5dfaee00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cf8e288883e40aba
dashboard link: https://syzkaller.appspot.com/bug?extid=c1a1fb435465986efe35
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=153ac495e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=153471d1e00000

Reported-by: syzbot+c1a1fb435465986efe35@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 0d581ba311a2 ("net: hns: add support for vlan TSO")

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