linux-kernel - Re: Kernel panic with user namespaces

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <5566BDC4.4020909@kyup.com>
Date:	Thu, 28 May 2015 10:03:32 +0300
From:	Nikolay Borisov <kernel@...p.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Josh Boyer <jwboyer@...oraproject.org>
CC:	Alexander Larsson <alexl@...hat.com>,
	containers@...ts.linux-foundation.org,
	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: Kernel panic with user namespaces

Hi,


I've run the attached test case on a clean 4.0 and 4.0 + the patch you
referenced but in neither cases could I crash the kernel. All that was
happening was for a new namespace to be created and bash executed in it
and after some seconds I get logged out of the machine. But then I can
log-in back and the kernel hasn't crashed.

Regards,
Nikolay


On 05/27/2015 06:16 PM, Eric W. Biederman wrote:
> Josh Boyer <jwboyer@...oraproject.org> writes:
> 
>> On Tue, May 26, 2015 at 12:31 PM, Eric W. Biederman
>> <ebiederm@...ssion.com> wrote:
>>> Alexander Larsson <alexl@...hat.com> writes:
>>>
>>>> On mån, 2015-05-18 at 16:39 +0200, Alexander Larsson wrote:
>>>>
>>>> Didn't get any replies to the below kernel panic (testcase attached),
>>>> which seems rather important to fix. Reposting to a wider audience.
>>>
>>> Buggered backport greg already has the fix somewhere in his queue.
>>
>> Is it fs_pin-allow-for-the-possibility-that-m_list-or-s_list-go-unused.patch
>> or mnt-fail-collect_mounts-when-applied-to-unmounted-mounts.patch ?
>> (Or both I guess.)  Those are the only 2 patches queued for 4.0 stable
>> right now.
> 
> Both fix the buggered backport.
> 
> fs_pin-allow-for-the-possibility-that-m_list-or-s_list-go-unused.patch
> fixes the crash.
> 
> Eric
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
> 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/