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Date:   Sun, 28 Jan 2018 22:55:41 +0100
From:   Florian Westphal <fw@...len.de>
To:     syzbot <syzbot+e783f671527912cd9403@...kaller.appspotmail.com>
Cc:     coreteam@...filter.org, davem@...emloft.net, fw@...len.de,
        kadlec@...ckhole.kfki.hu, kuznet@....inr.ac.ru,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, pablo@...filter.org,
        syzkaller-bugs@...glegroups.com, yoshfuji@...ux-ipv6.org
Subject: Re: general protection fault in ip6t_do_table

syzbot <syzbot+e783f671527912cd9403@...kaller.appspotmail.com> wrote:
> CPU: 0 PID: 3675 Comm: syzkaller168273 Not tainted 4.15.0-rc9+ #283
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> RIP: 0010:ip6t_do_table+0x12de/0x19d0 net/ipv6/netfilter/ip6_tables.c:360
> RSP: 0018:ffff8801db206c58 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: ffff8801d9aafb80 RCX: ffffffff84d30352
> RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8801d9aafcde
> RBP: ffff8801db206e60 R08: 1ffff1003b640d54 R09: 0000000000000000
> R10: 00000000000000d0 R11: 0000000000000000 R12: 0000000000000001
> R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d9aafc50
> FS:  0000000000a5d880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000209f1000 CR3: 00000001bc9f8001 CR4: 00000000001606f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  <IRQ>
>  ip6table_security_hook+0x65/0x80 net/ipv6/netfilter/ip6table_security.c:45

In case noone else can look at this I'll investigate this next friday
(currently travelling).

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