From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756896Ab3J1Osl (ORCPT ); Mon, 28 Oct 2013 10:48:41 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:51013 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756448Ab3J1Osh (ORCPT ); Mon, 28 Oct 2013 10:48:37 -0400 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Dan Carpenter , Wim Van Sebroeck , Jonghwan Choi , Luis Henriques Subject: [PATCH 3.5 03/64] watchdog: ts72xx_wdt: locking bug in ioctl Date: Mon, 28 Oct 2013 14:47:22 +0000 Message-Id: <1382971703-17393-4-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1382971703-17393-1-git-send-email-luis.henriques@canonical.com> References: <1382971703-17393-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.5.7.24 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter commit 8612ed0d97abcf1c016d34755b7cf2060de71963 upstream. Calling the WDIOC_GETSTATUS & WDIOC_GETBOOTSTATUS and twice will cause a interruptible deadlock. Signed-off-by: Dan Carpenter Reviewed-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck Cc: Jonghwan Choi Signed-off-by: Luis Henriques --- drivers/watchdog/ts72xx_wdt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/ts72xx_wdt.c b/drivers/watchdog/ts72xx_wdt.c index 8df050d..1c53745 100644 --- a/drivers/watchdog/ts72xx_wdt.c +++ b/drivers/watchdog/ts72xx_wdt.c @@ -310,7 +310,8 @@ static long ts72xx_wdt_ioctl(struct file *file, unsigned int cmd, case WDIOC_GETSTATUS: case WDIOC_GETBOOTSTATUS: - return put_user(0, p); + error = put_user(0, p); + break; case WDIOC_KEEPALIVE: ts72xx_wdt_kick(wdt); -- 1.8.3.2