linux-kernel - Re: WARNING: kmalloc bug in memdup

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Message-ID: <aa1656af-e347-f8a9-9def-1eaa165eb805@iogearbox.net>
Date:   Fri, 15 Jun 2018 22:24:30 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     syzbot <syzbot+0f92a17b0706231d0a09@...kaller.appspotmail.com>,
        ast@...nel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: WARNING: kmalloc bug in memdup_user (3)

On 05/16/2018 05:35 PM, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    c5c7d7f3c451 Merge branch 'bpf-sock-hashmap'
> git tree:       bpf-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1626ae37800000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=10c4dc62055b68f5
> dashboard link: https://syzkaller.appspot.com/bug?extid=0f92a17b0706231d0a09
> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=126a5197800000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1598c477800000
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+0f92a17b0706231d0a09@...kaller.appspotmail.com

#syz fix: bpf: fix sock hashmap kmalloc warning