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

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Message-ID: <491a26b8-7abb-0d36-0a2e-e1c7bfcde79d@oracle.com>
Date:   Wed, 14 Feb 2018 08:53:47 -0800
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     syzbot <syzbot+93a5839deb355537440f@...kaller.appspotmail.com>,
        linux-rdma@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        David Miller <davem@...emloft.net>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>, rds-devel@....oracle.com
Subject: Re: KASAN: use-after-free Read in rds_find_bound

On 2/13/2018 12:12 PM, Dmitry Vyukov wrote:
> On Sat, Dec 30, 2017 at 8:41 PM, santosh.shilimkar@...cle.com
> <santosh.shilimkar@...cle.com> wrote:
>> On 12/30/17 1:17 AM, syzbot wrote:
>>>
>>> Hello,
>>>
>>> syzkaller hit the following crash on
>>> fba961ab29e5ffb055592442808bb0f7962e05da
>>> git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-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.
>>>
>>>
>>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>>> Reported-by: syzbot+93a5839deb355537440f@...kaller.appspotmail.com
>>
>>
>> Posted a fix[1] for above issue. Didn't test it but looks straight
>> forward.
> 
> 
> Hi Santosh,
> 
> What is that fix? You forgot to provide any link/reference. I also
> don't see any patches from you at around that date...
> 
Fix [1] was later not added since there was a still a race. Wanted to
see if the issue re-appears after recent netns fix [2].

Regards,
Santosh


[1] https://patchwork.kernel.org/patch/10137901/
[2] https://patchwork.ozlabs.org/patch/868902/