linux-kernel - Re: general protection fault in ___bpf_prog

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Message-ID: <1ef4ac96-f409-5711-e8f7-2e7632ef618b@iogearbox.net>
Date:   Wed, 31 Jan 2018 01:35:54 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     syzbot <syzbot+1eb094057b338eb1fc00@...kaller.appspotmail.com>,
        ast@...nel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: general protection fault in ___bpf_prog_run

On 01/30/2018 09:58 PM, syzbot wrote:
> Hello,
> 
> syzbot hit the following crash on bpf-next commit
> 868c36dcc949c26bc74fa4661b670d9acc6489e4 (Mon Jan 29 03:00:16 2018 +0000)
> Merge tag 'wireless-drivers-next-for-davem-2018-01-26' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
> 
> So far this crash happened 2 times on bpf-next.
> C reproducer is attached.
> syzkaller reproducer is attached.
> Raw console output is attached.
> compiler: gcc (GCC) 7.1.1 20170620
> .config is attached.
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+1eb094057b338eb1fc00@...kaller.appspotmail.com
> It will help syzbot understand when the bug is fixed. See footer for details.
> If you forward the report, please keep this part and the footer.

Really great syzkaller report !

Fixed by: http://patchwork.ozlabs.org/patch/867748/