linux-kernel - Re: [rtc-linux] [PATCH 7/9] drivers/rtc: correct error-handling code

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]

Date:	Tue, 28 Jul 2009 18:31:04 +0200
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	rtc-linux@...glegroups.com
Cc:	p_gortmaker@...oo.com, a.zummo@...ertech.it,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [rtc-linux] [PATCH 7/9] drivers/rtc: correct error-handling
	code

On Tue, Jul 28, 2009 at 05:55:33PM +0200, Julia Lawall wrote:
> 
> From: Julia Lawall <julia@...u.dk>
> 
> This code is not executed before ds1307->rtc has been successfully
> initialized to the result of calling rtc_device_register.  Thus the test
> that ds1307->rtc is not NULL is always true.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @match exists@
> expression x, E;
> statement S1, S2;
> @@
> 
> x = rtc_device_register(...)
> ... when != x = E
> (
> *  if (x == NULL || ...) S1 else S2
> |
> *  if (x == NULL && ...) S1 else S2
> )
> // </smpl>
> 
> Signed-off-by: Julia Lawall <julia@...u.dk>

Acked-by: Wolfram Sang <w.sang@...gutronix.de>

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

Download attachment "signature.asc" of type "application/pgp-signature" (198 bytes)