From patchwork Fri Sep 11 16:21:35 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julia Lawall X-Patchwork-Id: 46883 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n8BGMpHd007713 for ; Fri, 11 Sep 2009 16:22:51 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754728AbZIKQVf (ORCPT ); Fri, 11 Sep 2009 12:21:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754603AbZIKQVf (ORCPT ); Fri, 11 Sep 2009 12:21:35 -0400 Received: from mgw2.diku.dk ([130.225.96.92]:42704 "EHLO mgw2.diku.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754644AbZIKQVe (ORCPT ); Fri, 11 Sep 2009 12:21:34 -0400 Received: from localhost (localhost [127.0.0.1]) by mgw2.diku.dk (Postfix) with ESMTP id D8F0919BB8B; Fri, 11 Sep 2009 18:21:36 +0200 (CEST) Received: from mgw2.diku.dk ([127.0.0.1]) by localhost (mgw2.diku.dk [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 24981-07; Fri, 11 Sep 2009 18:21:35 +0200 (CEST) Received: from nhugin.diku.dk (nhugin.diku.dk [130.225.96.140]) by mgw2.diku.dk (Postfix) with ESMTP id C841119BB8C; Fri, 11 Sep 2009 18:21:35 +0200 (CEST) Received: from pc-004.diku.dk (pc-004.diku.dk [130.225.97.4]) by nhugin.diku.dk (Postfix) with ESMTP id 077EA6DFAB8; Fri, 11 Sep 2009 18:19:49 +0200 (CEST) Received: by pc-004.diku.dk (Postfix, from userid 3767) id B29A2383C5; Fri, 11 Sep 2009 18:21:35 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by pc-004.diku.dk (Postfix) with ESMTP id B05503830C; Fri, 11 Sep 2009 18:21:35 +0200 (CEST) Date: Fri, 11 Sep 2009 18:21:35 +0200 (CEST) From: Julia Lawall To: Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH 3/8] drivers/media/video/hdpvr: introduce missing kfree Message-ID: MIME-Version: 1.0 X-Virus-Scanned: amavisd-new at diku.dk Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Julia Lawall Error handling code following a kzalloc should free the allocated data. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @r exists@ local idexpression x; statement S; expression E; identifier f,f1,l; position p1,p2; expression *ptr != NULL; @@ x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S <... when != x when != if (...) { <+...x...+> } ( x->f1 = E | (x->f1 == NULL || ...) | f(...,x->f1,...) ) ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // Signed-off-by: Julia Lawall --- drivers/media/video/hdpvr/hdpvr-video.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/media/video/hdpvr/hdpvr-video.c b/drivers/media/video/hdpvr/hdpvr-video.c index 2eb9dc2..0d17ce5 100644 --- a/drivers/media/video/hdpvr/hdpvr-video.c +++ b/drivers/media/video/hdpvr/hdpvr-video.c @@ -132,7 +132,7 @@ int hdpvr_alloc_buffers(struct hdpvr_device *dev, uint count) buf = kzalloc(sizeof(struct hdpvr_buffer), GFP_KERNEL); if (!buf) { v4l2_err(&dev->v4l2_dev, "cannot allocate buffer\n"); - goto exit; + goto exit_nobuf; } buf->dev = dev; @@ -162,6 +162,8 @@ int hdpvr_alloc_buffers(struct hdpvr_device *dev, uint count) } return 0; exit: + kfree(buf); +exit_nobuf: hdpvr_free_buffers(dev); return retval; }