linux-kernel - Re: KASAN: use-after-free Read in nbp_vlan_rcu

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Message-ID: <C0C76E26-AE73-4D51-B44A-FFC0EF629A83@cumulusnetworks.com>
Date:   Mon, 12 Nov 2018 09:32:08 +0100
From:   nikolay@...ulusnetworks.com
To:     syzbot <syzbot+04681da557a0e49a52e5@...kaller.appspotmail.com>,
        bridge@...ts.linux-foundation.org, davem@...emloft.net,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        roopa@...ulusnetworks.com, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in nbp_vlan_rcu_free

On 12 November 2018 06:51:02 CET, syzbot <syzbot+04681da557a0e49a52e5@...kaller.appspotmail.com> wrote:
>Hello,
>
>syzbot found the following crash on:
>
>HEAD commit:    e12e00e388de Merge tag 'kbuild-fixes-v4.20' of
>git://git.k..
>git tree:       upstream
>console output:
>https://syzkaller.appspot.com/x/log.txt?x=14cdb6f5400000
>kernel config: 
>https://syzkaller.appspot.com/x/.config?x=8f215f21f041a0d7
>dashboard link:
>https://syzkaller.appspot.com/bug?extid=04681da557a0e49a52e5
>compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
>
>Unfortunately, I don't have any reproducer for this crash yet.
>
>IMPORTANT: if you fix the bug, please add the following tag to the
>commit:
>Reported-by: syzbot+04681da557a0e49a52e5@...kaller.appspotmail.com

Thanks, I'm about to fly out for LPC. Will take a look in a day.