From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756233Ab0C3K2P (ORCPT ); Tue, 30 Mar 2010 06:28:15 -0400 Received: from moutng.kundenserver.de ([212.227.17.8]:60270 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756209Ab0C3K2N (ORCPT ); Tue, 30 Mar 2010 06:28:13 -0400 From: Arnd Bergmann To: Frederic Weisbecker Subject: Re: [PATCH 2/6] procfs: Use generic_file_llseek in /proc/kcore Date: Tue, 30 Mar 2010 11:28:06 +0100 User-Agent: KMail/1.12.2 (Linux/2.6.31-19-generic; KDE/4.3.2; x86_64; ; ) Cc: LKML , Thomas Gleixner , Andrew Morton , John Kacur , KAMEZAWA Hiroyuki , Al Viro , Ingo Molnar References: <1269930015-863-1-git-send-regression-fweisbec@gmail.com> <1269930015-863-3-git-send-regression-fweisbec@gmail.com> In-Reply-To: <1269930015-863-3-git-send-regression-fweisbec@gmail.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <201003301228.06607.arnd@arndb.de> X-Provags-ID: V01U2FsdGVkX18LzAAg3grsV7mSK+suDUVYjlZFEJo3e3uVuuf 7i/O0Wdx58oSwLKy63XOh4esfAw+sRGAdAvygrzll+ro/Z3wa9 TIu52I4R6BAIc+YHx8jdg== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 30 March 2010, Frederic Weisbecker wrote: > /proc/kcore has no llseek and then falls down to use default_llseek. > This is racy against read_kcore() that directly manipulates fpos > but it doesn't hold the bkl there so using it in llseek doesn't > protect anything. Acked-by: Arnd Bergmann