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Date: Tue, 18 Feb 2020 23:54:03 -0800
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Subject: Re: KASAN: use-after-free Read in bitmap_ip_ext_cleanup
From: syzbot <syzbot+b554d01b6c7870b17da2@syzkaller.appspotmail.com>
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To: a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org, bridge@lists.linux-foundation.org, coreteam@netfilter.org, davem@davemloft.net, florent.fourcot@wifirst.fr, fw@strlen.de, jeremy@azazel.net, johannes.berg@intel.com, kadlec@blackhole.kfki.hu, kadlec@netfilter.org, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, nikolay@cumulusnetworks.com, pablo@netfilter.org, roopa@cumulusnetworks.com, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com

syzbot suspects this bug was fixed by commit:

commit 32c72165dbd0e246e69d16a3ad348a4851afd415
Author: Kadlecsik J=C3=B3zsef <kadlec@blackhole.kfki.hu>
Date:   Sun Jan 19 21:06:49 2020 +0000

    netfilter: ipset: use bitmap infrastructure completely

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=3D17079245e000=
00
start commit:   8f8972a3 Merge tag 'mtd/fixes-for-5.5-rc7' of git://git.ke.=
.
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=3Dd9290aeb7e6cf1c=
4
dashboard link: https://syzkaller.appspot.com/bug?extid=3Db554d01b6c7870b17=
da2
userspace arch: i386
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=3D145948d6e0000=
0
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=3D16202cc9e00000

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

#syz fix: netfilter: ipset: use bitmap infrastructure completely

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