From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A1B7C43140 for ; Mon, 3 May 2021 17:07:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CC061611AD for ; Mon, 3 May 2021 17:07:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236521AbhECRHB (ORCPT ); Mon, 3 May 2021 13:07:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:43305 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235321AbhECQ4K (ORCPT ); Mon, 3 May 2021 12:56:10 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A045061404; Mon, 3 May 2021 16:43:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620060214; bh=tdsfINl8WT06Bq7ZxsVz/BBSClxn1h0PBiNLgj8e6j8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kqpMlV0JQaKjL07Ri3SUIdH9KY/qCaRTUM52wlD/y9k4beP5yke6fDnDs/0SSsmPM MyY51g5tNY2ZgpRNdXJWmoXy9GZp68STeTPws0pV3pH94VDXsvWpKA4bIAu3iObX3K MhPmcPah6x5II4XHCak6/uL2GAVxMw74ckxVLXAcZqVqeEUJgnBV1/C6pwmgqWGdJG ZlmYC5PDTlwYXF6DVbBVZlvRxYMWcoOzEX8B3Q/8LqpVL6t+Eqrzq9U+EZKN5GIzYj wnbUvUbyf2cCD2Q4zIoJHkSO0V0k6BMw0bQrnB+Hxc3BorcPmvOLj26wEhlDfYIQcm DGOH8VIKACnSA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Daniel Niv , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 03/16] media: media/saa7164: fix saa7164_encoder_register() memory leak bugs Date: Mon, 3 May 2021 12:43:16 -0400 Message-Id: <20210503164329.2854739-3-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210503164329.2854739-1-sashal@kernel.org> References: <20210503164329.2854739-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Daniel Niv [ Upstream commit c759b2970c561e3b56aa030deb13db104262adfe ] Add a fix for the memory leak bugs that can occur when the saa7164_encoder_register() function fails. The function allocates memory without explicitly freeing it when errors occur. Add a better error handling that deallocate the unused buffers before the function exits during a fail. Signed-off-by: Daniel Niv Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/pci/saa7164/saa7164-encoder.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/drivers/media/pci/saa7164/saa7164-encoder.c b/drivers/media/pci/saa7164/saa7164-encoder.c index 1b184c39ba97..966de363c575 100644 --- a/drivers/media/pci/saa7164/saa7164-encoder.c +++ b/drivers/media/pci/saa7164/saa7164-encoder.c @@ -1031,7 +1031,7 @@ int saa7164_encoder_register(struct saa7164_port *port) "(errno = %d), NO PCI configuration\n", __func__, result); result = -ENOMEM; - goto failed; + goto fail_pci; } /* Establish encoder defaults here */ @@ -1085,7 +1085,7 @@ int saa7164_encoder_register(struct saa7164_port *port) 100000, ENCODER_DEF_BITRATE); if (hdl->error) { result = hdl->error; - goto failed; + goto fail_hdl; } port->std = V4L2_STD_NTSC_M; @@ -1103,7 +1103,7 @@ int saa7164_encoder_register(struct saa7164_port *port) printk(KERN_INFO "%s: can't allocate mpeg device\n", dev->name); result = -ENOMEM; - goto failed; + goto fail_hdl; } port->v4l_device->ctrl_handler = hdl; @@ -1114,10 +1114,7 @@ int saa7164_encoder_register(struct saa7164_port *port) if (result < 0) { printk(KERN_INFO "%s: can't register mpeg device\n", dev->name); - /* TODO: We're going to leak here if we don't dealloc - The buffers above. The unreg function can't deal wit it. - */ - goto failed; + goto fail_reg; } printk(KERN_INFO "%s: registered device video%d [mpeg]\n", @@ -1139,9 +1136,14 @@ int saa7164_encoder_register(struct saa7164_port *port) saa7164_api_set_encoder(port); saa7164_api_get_encoder(port); + return 0; - result = 0; -failed: +fail_reg: + video_device_release(port->v4l_device); + port->v4l_device = NULL; +fail_hdl: + v4l2_ctrl_handler_free(hdl); +fail_pci: return result; } -- 2.30.2