netdev - Re: KASAN: use-after-free Read in bpf_tcp

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Message-ID: <745e7f32-a886-2c7c-77e5-72bafb5105c7@gmail.com>
Date:   Mon, 2 Jul 2018 11:56:08 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     syzbot <syzbot+fce8f2462c403d02af98@...kaller.appspotmail.com>,
        ast@...nel.org, daniel@...earbox.net, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in bpf_tcp_close

On 05/26/2018 01:54 AM, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    3fb48d881dbe Merge branch 'bpf-fib-mtu-check'
> git tree:       bpf-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=15fc1977800000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1
> dashboard link: https://syzkaller.appspot.com/bug?extid=fce8f2462c403d02af98
> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=1310c857800000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17de7177800000
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+fce8f2462c403d02af98@...kaller.appspotmail.com
> 
> ==================================================================


#syz fix: bpf: sockhash fix omitted bucket lock in sock_close