linux-kernel - Re: linux-next: kernel BUG at mm/slub.c:1447!

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

Date:	Fri, 2 Oct 2015 15:42:44 +0200
From:	Michal Hocko <mhocko@...nel.org>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	linux-mm@...ck.org, Dave Chinner <david@...morbit.com>
Subject: Re: linux-next: kernel BUG at mm/slub.c:1447!

On Fri 02-10-15 06:36:57, Guenter Roeck wrote:
> On 10/01/2015 01:49 PM, Andrew Morton wrote:
> >On Thu, 1 Oct 2015 09:06:15 -0700 Guenter Roeck <linux@...ck-us.net> wrote:
> >
> >>Seen with next-20151001, running qemu, simulating Opteron_G1 with a non-SMP configuration.
> >>On a re-run, I have seen it with the same image, but this time when simulating IvyBridge,
> >>so it is not CPU dependent. I did not previously see the problem.
> >>
> >>Log is at
> >>http://server.roeck-us.net:8010/builders/qemu-x86-next/builds/259/steps/qemubuildcommand/logs/stdio
> >>
> >>I'll try to bisect. The problem is not seen with every boot, so that may take a while.
> >
> >Caused by mhocko's "mm, fs: obey gfp_mapping for add_to_page_cache()",
> >I expect.
> >
> I tried to bisect to be sure, but the problem doesn't happen often enough, and I got some
> false negatives. I assume bisect is no longer necessary. If I need to try again, please
> let me know.

The updated patch has been posted here:
http://lkml.kernel.org/r/20151002085324.GA2927%40dhcp22.suse.cz

Andrew's analysis seems decent so I am pretty sure it should fix the
issue.
-- 
Michal Hocko
SUSE Labs
--
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/