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

[syzbot]

syzbot has bisected this bug to:

commit 751ad98d5f881df91ba47e013b82422912381e8e
Author: Marco Elver <elver@xxxxxxxxxx>
Date:   Fri Jul 12 03:54:00 2019 +0000

    asm-generic, x86: add bitops instrumentation for KASAN

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1287db66e00000
start commit:   244dc268 Merge tag 'drm-fixes-2020-01-19' of git://anongit..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=1187db66e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1687db66e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d9290aeb7e6cf1c4
dashboard link: https://syzkaller.appspot.com/bug?extid=f3e96783d74ee8ea9aa3
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1104c495e00000

Reported-by: syzbot+f3e96783d74ee8ea9aa3@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 751ad98d5f88 ("asm-generic, x86: add bitops instrumentation for KASAN")

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