linux-kernel - Re: BUG: unable to handle kernel paging request in ipcget

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Date:   Tue, 2 Jan 2018 10:16:24 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Manfred Spraul <manfred@...orfullife.com>,
        syzbot 
        <bot+362ae63b121c06066d2b6e1385d38efecbeca4f6@...kaller.appspotmail.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guillaume Knispel <guillaume.knispel@...ersonicimagine.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Michal Hocko <mhocko@...e.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        syzkaller-bugs@...glegroups.com,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: BUG: unable to handle kernel paging request in ipcget

On Sat, Dec 23, 2017 at 2:07 AM, Dmitry Vyukov <dvyukov@...gle.com> wrote:
> On Sat, Dec 23, 2017 at 10:59 AM, Manfred Spraul
> <manfred@...orfullife.com> wrote:
>> Hi,
>>
>> On 12/23/2017 08:33 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.
>>>
>> Is one of the recent issues reproducible?
>
> Which one do you mean?
> syzbot always provides up-to-date status of reproducers for all reported bugs.
>
>> Either something is wrong with the faster ipc_get, or the improved ipc_get
>> makes issues in other areas visible.
>>
>> --
>>     Manfred
>>
>> --
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>>
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Was this report related to the recent set of kmalloc-1024 false positives?

-Kees

-- 
Kees Cook
Pixel Security