linux-kernel - Re: BUG: spinlock bad magic (2)

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Message-ID: <24ea899d-d541-0274-c5bf-8a6e35473ca5@oracle.com>
Date:   Tue, 30 Jan 2018 19:49:51 -0800
From:   "santosh.shilimkar@...cle.com" <santosh.shilimkar@...cle.com>
To:     Eric Biggers <ebiggers3@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>
Cc:     syzbot 
        <bot+d3f5d339869eb8cd834d2c9f0a88bf4f05c29781@...kaller.appspotmail.com>,
        David Miller <davem@...emloft.net>,
        LKML <linux-kernel@...r.kernel.org>, linux-rdma@...r.kernel.org,
        netdev <netdev@...r.kernel.org>, rds-devel@....oracle.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: BUG: spinlock bad magic (2)



On 1/30/18 2:28 PM, Eric Biggers wrote:
> On Mon, Dec 18, 2017 at 06:01:30PM +0100, 'Dmitry Vyukov' via syzkaller-bugs wrote:
>> On Mon, Dec 18, 2017 at 5:46 PM, Santosh Shilimkar
>> <santosh.shilimkar@...cle.com> wrote:
>>> On 12/18/2017 4:36 AM, syzbot wrote:
>>>>
>>>> Hello,
>>>>
>>>> syzkaller hit the following crash on
>>>> 6084b576dca2e898f5c101baef151f7bfdbb606d
>>>> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
>>>> compiler: gcc (GCC) 7.1.1 20170620
>>>> .config is attached
>>>> Raw console output is attached.
>>>>
>>>> Unfortunately, I don't have any reproducer for this bug yet.
>>>>
>>> [...]
>>>
>>>> BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
>>>> IP: rds_send_xmit+0x80/0x930 net/rds/send.c:186
>>>
>>>
>>> This one seems to be same bug as reported as below.
>>>
>>> BUG: unable to handle kernel NULL pointer dereference in rds_send_xmit
>>
>> Hi Santosh,
>>
>> The proper syntax to tell syzbot about dups is this (from email footer):
>>
>>> See https://goo.gl/tpsmEJ for details.
>>> Please credit me with: Reported-by: syzbot <syzkaller@...glegroups.com>
>>> syzbot will keep track of this bug report.
>>> To mark this as a duplicate of another syzbot report, please reply with:
>>> #syz dup: exact-subject-of-another-report
>>> Note: all commands must start from beginning of the line in the email body.
> 
> #syz dup: BUG: unable to handle kernel NULL pointer dereference in rds_send_xmit

Ok. Noted.