Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752666Ab3GXRUg (ORCPT ); Wed, 24 Jul 2013 13:20:36 -0400 Received: from mail-pa0-f54.google.com ([209.85.220.54]:43027 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752567Ab3GXRU3 (ORCPT ); Wed, 24 Jul 2013 13:20:29 -0400 From: Peng Tao To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, Sebastien Buisson , Peng Tao , Andreas Dilger Subject: [PATCH-RESEND 3/8] staging/lustre: fix 'data race condition' issues in at_reset() Date: Thu, 25 Jul 2013 01:17:26 +0800 Message-Id: <1374686251-3152-4-git-send-email-bergwolf@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1374686251-3152-1-git-send-email-bergwolf@gmail.com> References: <1374686251-3152-1-git-send-email-bergwolf@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1807 Lines: 46 From: Sebastien Buisson Fix 'data race condition' defects found by Coverity version 6.5.0: Data race condition (MISSING_LOCK) Accessing variable without holding lock. Elsewhere, this variable is accessed with lock held. at_reset() needs to take at->at_lock before modifying its members. Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-2744 Lustre-change: http://review.whamcloud.com/6569 Signed-off-by: Sebastien Buisson Reviewed-by: Bob Glossman Reviewed-by: Keith Mannthey Reviewed-by: Oleg Drokin Signed-off-by: Peng Tao Signed-off-by: Andreas Dilger --- .../staging/lustre/lustre/include/lustre_import.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/staging/lustre/lustre/include/lustre_import.h b/drivers/staging/lustre/lustre/include/lustre_import.h index 3a5dd6a..67259eb 100644 --- a/drivers/staging/lustre/lustre/include/lustre_import.h +++ b/drivers/staging/lustre/lustre/include/lustre_import.h @@ -336,9 +336,11 @@ static inline unsigned int at_timeout2est(unsigned int val) } static inline void at_reset(struct adaptive_timeout *at, int val) { + spin_lock(&at->at_lock); at->at_current = val; at->at_worst_ever = val; at->at_worst_time = cfs_time_current_sec(); + spin_unlock(&at->at_lock); } static inline void at_init(struct adaptive_timeout *at, int val, int flags) { memset(at, 0, sizeof(*at)); -- 1.7.1 -- 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/