From: syzbot <syzbot+76de61614cb1abdd73fc@syzkaller.appspotmail.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: ast@kernel.org, daniel@iogearbox.net, davem@davemloft.net,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: Re: KASAN: slab-out-of-bounds Read in bpf_skb_vlan_push
Date: Wed, 13 Jun 2018 11:13:23 -0700 [thread overview]
Message-ID: <000000000000402477056e89f067@google.com> (raw)
In-Reply-To: <b3af0f35-b0f8-859d-4f8f-b919d35ebaaa@iogearbox.net>
> On 06/13/2018 06:17 PM, syzbot wrote:
>> Hello,
>> syzbot found the following crash on:
>> HEAD commit: 75d4e704fa8d netdev-FAQ: clarify DaveM's position for
>> stab..
>> git tree: bpf-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=1754783f800000
>> kernel config:
>> https://syzkaller.appspot.com/x/.config?x=a601a80fec461d44
>> dashboard link:
>> https://syzkaller.appspot.com/bug?extid=76de61614cb1abdd73fc
>> compiler: gcc (GCC) 8.0.1 20180413 (experimental)
>> syzkaller
>> repro:https://syzkaller.appspot.com/x/repro.syz?x=12c1e1bf800000
>> IMPORTANT: if you fix the bug, please add the following tag to the
>> commit:
>> Reported-by: syzbot+76de61614cb1abdd73fc@syzkaller.appspotmail.com
>> IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
>> IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
>> 8021q: adding VLAN 0 to HW filter on device team0
>> 8021q: adding VLAN 0 to HW filter on device team0
>> ==================================================================
>> BUG: KASAN: slab-out-of-bounds in skb_at_tc_ingress
>> include/net/sch_generic.h:535 [inline]
>> BUG: KASAN: slab-out-of-bounds in bpf_push_mac_rcsum
>> net/core/filter.c:1625 [inline]
>> BUG: KASAN: slab-out-of-bounds in ____bpf_skb_vlan_push
>> net/core/filter.c:2446 [inline]
>> BUG: KASAN: slab-out-of-bounds in bpf_skb_vlan_push+0x6b7/0x720
>> net/core/filter.c:2437
>> Read of size 5 at addr ffff8801b77347d0 by task syz-executor6/6529
> Should be fixed already by:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=58990d1ff3f7896ee341030e9a7c2e4002570683
> #syz test:
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
want 2 args (repo, branch), got 1
next prev parent reply other threads:[~2018-06-13 18:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-13 16:17 KASAN: slab-out-of-bounds Read in bpf_skb_vlan_push syzbot
2018-06-13 18:13 ` Daniel Borkmann
2018-06-13 18:13 ` syzbot [this message]
2018-06-13 18:15 ` Daniel Borkmann
2018-06-13 18:49 ` syzbot
2018-06-14 7:37 ` Dmitry Vyukov
2018-06-13 18:34 ` syzbot
2018-06-13 18:42 ` Daniel Borkmann
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