Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763988AbZFNUfr (ORCPT ); Sun, 14 Jun 2009 16:35:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760408AbZFNUf1 (ORCPT ); Sun, 14 Jun 2009 16:35:27 -0400 Received: from moutng.kundenserver.de ([212.227.126.187]:62964 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763776AbZFNUf0 (ORCPT ); Sun, 14 Jun 2009 16:35:26 -0400 From: Arnd Bergmann To: Mike Frysinger Subject: Re: [PATCH 2/4] asm-generic: uaccess: add missing access_ok() check to strnlen_user() Date: Sun, 14 Jun 2009 22:35:26 +0200 User-Agent: KMail/1.11.90 (Linux/2.6.30-8-generic; KDE/4.2.85; x86_64; ; ) Cc: linux-kernel@vger.kernel.org References: <1244959204-11269-1-git-send-email-vapier@gentoo.org> <1244959204-11269-2-git-send-email-vapier@gentoo.org> In-Reply-To: <1244959204-11269-2-git-send-email-vapier@gentoo.org> X-Face: I@=L^?./?$U,EK.)V[4*>`zSqm0>65YtkOe>TFD'!aw?7OVv#~5xd\s,[~w]-J!)|%=]> =?utf-8?q?+=0A=09=7EohchhkRGW=3F=7C6=5FqTmkd=5Ft=3FLZC=23Q-=60=2E=60Y=2Ea=5E?= =?utf-8?q?3zb?=) =?utf-8?q?+U-JVN=5DWT=25cw=23=5BYo0=267C=26bL12wWGlZi=0A=09=7EJ=3B=5Cwg?= =?utf-8?q?=3B3zRnz?=,J"CT_)=\H'1/{?SR7GDu?WIopm.HaBG=QYj"NZD_[zrM\Gip^U MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <200906142235.26522.arnd@arndb.de> X-Provags-ID: V01U2FsdGVkX18sUAflqbbrPGPoJKS0JoAJ5UhOrInCog/+mC5 /EYC948rH9yZXBqTMVapnlj0QXDkV+d/cdyXzhsaIUyKBOr7Nb ivnV+2N/qr2n1xKh/Zapg== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 650 Lines: 16 On Sunday 14 June 2009, Mike Frysinger wrote: > The strnlen_user() function was missing a access_ok() check on the pointer > given. We've had cases on Blackfin systems where test programs caused > kernel crashes here because userspace passed up a NULL/-1 pointer and the > kernel gladly attempted to run strlen() on it. > > Signed-off-by: Mike Frysinger Applied, thanks. Arnd <>< -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/