From patchwork Tue Apr 25 13:25:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 13223319 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A07BC77B61 for ; Tue, 25 Apr 2023 13:25:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234171AbjDYNZy (ORCPT ); Tue, 25 Apr 2023 09:25:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233329AbjDYNZx (ORCPT ); Tue, 25 Apr 2023 09:25:53 -0400 Received: from smtp.smtpout.orange.fr (smtp-11.smtpout.orange.fr [80.12.242.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 24A6413F94 for ; Tue, 25 Apr 2023 06:25:49 -0700 (PDT) Received: from pop-os.home ([86.243.2.178]) by smtp.orange.fr with ESMTPA id rIfzpNZfxLbpDrIfzphTyk; Tue, 25 Apr 2023 15:25:48 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wanadoo.fr; s=t20230301; t=1682429148; bh=0CeXjHqICQk7DLJzz6VjSF2+bjOODLrldPjkrHUYBUc=; h=From:To:Cc:Subject:Date; b=j3P89YIITwZY8lXV2Qx7n2LRfrMAL9l2sK9ZcSA6ql20V09I4b1H2XyewoveyDvrS 3Zig775onP4tYCUdbtNBw6ATUBqf4iVKHoWnbpgUHJLJBX1K8EVBTPt9XmbolmhDPz f+cC1Dbyq+BFRdhlsIvm0TYD9DcwmlvBXye5hKvpt12H28ZrvInjPs4ybPJGQdvPlr SXrLmijp4ZIKmriKBiQiysf4ythMRBchAW7IjbZ0EuWWwkBw/EeK1fc2Th4mikNNrN qy7OtkQfb9J/ysAzrFuq9MMa9UfiqfNb0BWz80/h1W5IuumK9W/xnkOCCOLbGGmS2v 8MkpGYKCGpv0w== X-ME-Helo: pop-os.home X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Tue, 25 Apr 2023 15:25:48 +0200 X-ME-IP: 86.243.2.178 From: Christophe JAILLET To: Hans Verkuil , Mauro Carvalho Chehab Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET , Hans Verkuil , linux-media@vger.kernel.org Subject: [PATCH] media: common: saa7146: Avoid a leak in vmalloc_to_sg() Date: Tue, 25 Apr 2023 15:25:46 +0200 Message-Id: X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Commit in Fixes turned a BUG() into a "normal" memory allocation failure. While at it, it introduced a memory leak. So fix it. Also update the comment on top of the function to reflect what has been change by the commit in Fixes. Fixes: 40e986c99624 ("media: common: saa7146: replace BUG_ON by WARN_ON") Signed-off-by: Christophe JAILLET --- drivers/media/common/saa7146/saa7146_core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/media/common/saa7146/saa7146_core.c b/drivers/media/common/saa7146/saa7146_core.c index bcb957883044..27c53eed8fe3 100644 --- a/drivers/media/common/saa7146/saa7146_core.c +++ b/drivers/media/common/saa7146/saa7146_core.c @@ -133,8 +133,8 @@ int saa7146_wait_for_debi_done(struct saa7146_dev *dev, int nobusyloop) ****************************************************************************/ /* this is videobuf_vmalloc_to_sg() from videobuf-dma-sg.c - make sure virt has been allocated with vmalloc_32(), otherwise the BUG() - may be triggered on highmem machines */ + make sure virt has been allocated with vmalloc_32(), otherwise return NULL + on highmem machines */ static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages) { struct scatterlist *sglist; @@ -150,7 +150,7 @@ static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages) if (NULL == pg) goto err; if (WARN_ON(PageHighMem(pg))) - return NULL; + goto err; sg_set_page(&sglist[i], pg, PAGE_SIZE, 0); } return sglist;