linux-kernel - Re: A regression in recent 3.2 kernel: bdi_dirty

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

Date:	Sat, 7 Jan 2012 22:56:45 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Илья Тумайкин 
	<librarian_rus@...oo.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-fsdevel@...r.kernel.org
Subject: Re: A regression in recent 3.2 kernel: bdi_dirty_limit() divide
 error

Hi Ilya,

Thanks for the report!
Would you try if the attached patch can fix it?

Thanks,
Fengguang

On Fri, Jan 06, 2012 at 01:13:15PM -0800, Илья Тумайкин wrote:
> Hello, Mr. Fengguang.
> 
> As you know the 3.2 version of Linux kernel was just released, so I decided to try it out. After I sucessfully compiled it with the  previously used configuration file a bug appeared: as soon as I try to log into X, the kernel crashes producing the trace which you can see in the attachements. In terminal or when just running kdm everything is ok, also everything is completely stable with 3.1.7, so I've guessed it is kernel regression. After some playing with 'git bisect' it has pinpointed me to this commit:
> 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7381131cbcf7e15d201a0ffd782a4698efe4e740
> 
> That's why I've sent you this mail. I've attached several photos of different traces which I got during bisecting (nothing hit the log or very small pieces of info). If any addtional info is needed I am ready to provide it to you.
> 
> OS: Gentoo amd64 with vanilla 3.2 kernel.
> 
> Best regards.
> Ilya Tumaykin.







View attachment "proportion-init-shift.patch" of type "text/x-diff" (633 bytes)