linux-kernel - Re: KASAN: slab-out-of-bounds Read in bpf_skb_vlan

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Message-ID: <edbf0ff2-39a4-c6be-5257-219a06cfa3ba@iogearbox.net>
Date:   Wed, 13 Jun 2018 20:42:29 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     syzbot <syzbot+76de61614cb1abdd73fc@...kaller.appspotmail.com>,
        ast@...nel.org, davem@...emloft.net, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: slab-out-of-bounds Read in bpf_skb_vlan_push

On 06/13/2018 08:34 PM, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch and the reproducer did not trigger crash:
> 
> Reported-and-tested-by: syzbot+76de61614cb1abdd73fc@...kaller.appspotmail.com
> 
> Tested on:
> 
> commit:         be779f03d563 Merge tag 'kbuild-v4.18-2' of git://git.kerne..
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/--
> kernel config:  https://syzkaller.appspot.com/x/.config?x=68d8eba98e3f8e88
> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> 
> Note: testing is done by a robot and is best-effort only.

#syz fix: bpf: reject passing modified ctx to helper functions