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Date: Fri, 24 Jan 2020 16:45:01 -0800
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Subject: Re: KASAN: slab-out-of-bounds Read in bitmap_ipmac_destroy
From: syzbot <syzbot+a85062dec5d65617cc1c@syzkaller.appspotmail.com>
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To: a@unstable.cc, arvid.brodin@alten.se, b.a.t.m.a.n@lists.open-mesh.org, coreteam@netfilter.org, davem@davemloft.net, florent.fourcot@wifirst.fr, fw@strlen.de, jeremy@azazel.net, johannes.berg@intel.com, kadlec@netfilter.org, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com

syzbot has bisected this bug to:

commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668
Author: Cong Wang <xiyou.wangcong@gmail.com>
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=123fce01e00000
start commit:   4703d911 Merge tag 'xarray-5.5' of git://git.infradead.org..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=113fce01e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=163fce01e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=83c00afca9cf5153
dashboard link: https://syzkaller.appspot.com/bug?extid=a85062dec5d65617cc1c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1301ed85e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14b7b79ee00000

Reported-by: syzbot+a85062dec5d65617cc1c@syzkaller.appspotmail.com
Fixes: b9a1e627405d ("hsr: implement dellink to clean up resources")

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