linux-kernel - Re: KASAN: use-after-free Read in bitmap_ip

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Date:   Wed, 19 Feb 2020 07:50:33 +0100 (CET)
From:   Jozsef Kadlecsik <kadlec@...filter.org>
To:     syzbot <syzbot+8b5f151de2f35100bbc5@...kaller.appspotmail.com>
cc:     a@...table.cc, b.a.t.m.a.n@...ts.open-mesh.org,
        coreteam@...filter.org, David Miller <davem@...emloft.net>,
        florent.fourcot@...irst.fr, Florian Westphal <fw@...len.de>,
        jeremy@...zel.net, johannes.berg@...el.com,
        linux-kernel@...r.kernel.org, lipeng321@...wei.com,
        mareklindner@...mailbox.ch, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org,
        Pablo Neira Ayuso <pablo@...filter.org>,
        sw@...onwunderlich.de, syzkaller-bugs@...glegroups.com,
        tanhuazhong@...wei.com
Subject: Re: KASAN: use-after-free Read in bitmap_ip_destroy


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

On Tue, 18 Feb 2020, syzbot wrote:

> syzbot suspects this bug was fixed by commit:
> 
> commit 32c72165dbd0e246e69d16a3ad348a4851afd415
> Author: Kadlecsik József <kadlec@...ckhole.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=17fc79b5e00000
> 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=cfbb8fa33f49f9f3
> dashboard link: https://syzkaller.appspot.com/bug?extid=8b5f151de2f35100bbc5
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12e22559e00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16056faee00000
> 
> 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#bisection
> 

-
E-mail  : kadlec@...ckhole.kfki.hu, kadlecsik.jozsef@...ner.hu
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Address : Wigner Research Centre for Physics
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