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

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Date:   Fri, 3 Aug 2018 10:48:52 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     syzbot <syzbot+25554ab865a12b51c66f@...kaller.appspotmail.com>,
        ast@...nel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in bpf_cgroup_storage_release

On 08/02/2018 07:59 PM, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    fc2a3b5dd618 Merge branch 'bpf-cgroup-local-storage'
> git tree:       bpf-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=17a6a1c8400000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3bfcc1651962483
> dashboard link: https://syzkaller.appspot.com/bug?extid=25554ab865a12b51c66f
> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=12c4b9b4400000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13e9d6f0400000
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+25554ab865a12b51c66f@...kaller.appspotmail.com

#syz fix: 82c018d734a7 Merge branch 'bpf-cgroup-local-storage'