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  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]
Date:	Mon, 11 Aug 2014 08:11:53 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Manuel Lauss <manuel.lauss@...il.com>
Cc:	Kees Cook <keescook@...omium.org>,
	Linux-MIPS <linux-mips@...ux-mips.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: MIPS: hang in kmalloc with seccomp writer locks

On Mon, Aug 11, 2014 at 01:35:28PM +0200, Manuel Lauss wrote:
> Hi Kees,
> 
> My MIPS32 toys hang early during bootup at the first kmalloc() with
> seccomp enabled.
> I've bisected it to commit dbd952127d11bb44a4ea30b08cc60531b6a23d71
> ("seccomp: introduce writer locking").  And indeed, reverting this
> commit fixes the hang.
> 
> I'm not sure if seccomp is even working on MIPS, but I've never had
> problems with
> it before so I thought I let you know.
> 

Also see [1] and [2], the latter providing a patch to fix the problem.
The problem is only seen in unicore systems with lock debugging disabled.

Guenter

---
[1] https://lkml.org/lkml/2014/8/9/163
[2] https://lkml.org/lkml/2014/8/10/184
--
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/

Powered by blists - more mailing lists