linux-kernel - Re: SLUB + UML : WARNING: at mm/page

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Date:	Thu, 14 Mar 2013 22:24:16 +0100
From:	Toralf Förster <toralf.foerster@....de>
To:	Dave Jones <davej@...hat.com>,
	richard -rw- weinberger <richard.weinberger@...il.com>,
	linux-mm@...ck.org, user-mode-linux-user@...ts.sourceforge.net,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Davi Arnaut <davi.arnaut@...il.com>
Subject: Re: SLUB + UML : WARNING: at mm/page_alloc.c:2386

On 03/14/2013 10:21 PM, Dave Jones wrote:
> hah, strndup_user taking a signed long instead of a size_t as it's length arg.
> 
> either it needs to change, or it needs an explicit check for < 1
> 
> I wonder how many other paths make it possible to pass negative numbers here.

just for the statistics - currently -14 rules  :

2013-03-14T22:06:21.618+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:06:25.664+01:00 trinity kernel: memdup_user: 28
2013-03-14T22:06:25.664+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:06:37.533+01:00 trinity kernel: memdup_user: 3
2013-03-14T22:08:03.379+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:09:34.668+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:12:33.277+01:00 trinity kernel: memdup_user: -14
2013-03-14T22:13:15.214+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:14:18.874+01:00 trinity kernel: trinity-watchdo[1169]: segfault at 244 ip 0804c956 sp bf836c9c error 4 in trinity[8048000+1d000]
2013-03-14T22:15:10.287+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:15:10.287+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:17:50.351+01:00 trinity kernel: memdup_user: 2
2013-03-14T22:17:59.411+01:00 trinity kernel: memdup_user: -14

:-D

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
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