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SubjectRe: 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@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=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@blackhole.kfki.hu, kadlecsik.jozsef@wigner.hu
PGP key : https://wigner.hu/~kadlec/pgp_public_key.txt
Address : Wigner Research Centre for Physics
H-1525 Budapest 114, POB. 49, Hungary
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