netdev - Re: [lkp-robot] 486ad79630 [ 15.532543] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004

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Date:   Thu, 3 May 2018 11:02:26 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     kernel test robot <lkp@...el.com>,
        kernel test robot <shun.hao@...el.com>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Johannes Weiner <hannes@...xchg.org>, LKP <lkp@...org>,
        David Miller <davem@...emloft.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [lkp-robot] 486ad79630 [ 15.532543] BUG: unable to handle kernel
 NULL pointer dereference at 0000000000000004

On Wed, May 2, 2018 at 10:44 PM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> On Wed, 2 May 2018 21:58:25 -0700 Cong Wang <xiyou.wangcong@...il.com> wrote:
>
>> On Wed, May 2, 2018 at 9:27 PM, Andrew Morton <akpm@...ux-foundation.org> wrote:
>> >
>> > So it's saying that something which got committed into Linus's tree
>> > after 4.17-rc3 has caused a NULL deref in
>> > sock_release->llc_ui_release+0x3a/0xd0
>>
>> Do you mean it contains commit 3a04ce7130a7
>> ("llc: fix NULL pointer deref for SOCK_ZAPPED")?
>
> That was in 4.17-rc3 so if this report's bisection is correct, that
> patch is innocent.
>
> origin.patch (http://ozlabs.org/~akpm/mmots/broken-out/origin.patch)
> contains no changes to net/llc/af_llc.c so perhaps this crash is also
> occurring in 4.17-rc3 base.

The commit I pointed out is supposed to fix this bug...

Please let me know if it doesn't.