From patchwork Mon Aug 6 15:50:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anton Vasilyev X-Patchwork-Id: 10557345 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AE28C13AC for ; Mon, 6 Aug 2018 15:51:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9E17729655 for ; Mon, 6 Aug 2018 15:51:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9C79329757; Mon, 6 Aug 2018 15:51:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E7FB0298B1 for ; Mon, 6 Aug 2018 15:51:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732929AbeHFSAh (ORCPT ); Mon, 6 Aug 2018 14:00:37 -0400 Received: from bran.ispras.ru ([83.149.199.196]:23653 "EHLO smtp.ispras.ru" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728626AbeHFSAh (ORCPT ); Mon, 6 Aug 2018 14:00:37 -0400 Received: from myklebust.intra.ispras.ru (unknown [10.10.2.207]) by smtp.ispras.ru (Postfix) with ESMTP id 20806203C7; Mon, 6 Aug 2018 18:50:53 +0300 (MSK) From: Anton Vasilyev To: "Lad, Prabhakar" Cc: Anton Vasilyev , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org Subject: [PATCH v2 1/2] media: davinci: vpif_display: Mix memory leak on probe error path Date: Mon, 6 Aug 2018 18:50:24 +0300 Message-Id: <20180806155025.8912-1-vasilyev@ispras.ru> X-Mailer: git-send-email 2.18.0 In-Reply-To: References: Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP If vpif_probe() fails on v4l2_device_register() then memory allocated at initialize_vpif() for global vpif_obj.dev[i] become unreleased. The patch adds deallocation of vpif_obj.dev[i] on the probe error path. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Anton Vasilyev Acked-by: Lad, Prabhakar --- v2: divided the original patch into two and made stylistic fixes based on the Prabhakar's rewiev. --- drivers/media/platform/davinci/vpif_display.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c index 7be636237acf..d9e578ac79c2 100644 --- a/drivers/media/platform/davinci/vpif_display.c +++ b/drivers/media/platform/davinci/vpif_display.c @@ -1271,7 +1271,7 @@ static __init int vpif_probe(struct platform_device *pdev) err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev); if (err) { v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n"); - return err; + goto vpif_free; } while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) { @@ -1314,7 +1314,9 @@ static __init int vpif_probe(struct platform_device *pdev) if (vpif_obj.sd[i]) vpif_obj.sd[i]->grp_id = 1 << i; } - vpif_probe_complete(); + err = vpif_probe_complete(); + if (err) + goto probe_subdev_out; } else { vpif_obj.notifier.subdevs = vpif_obj.config->asd; vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0]; @@ -1334,6 +1336,9 @@ static __init int vpif_probe(struct platform_device *pdev) kfree(vpif_obj.sd); vpif_unregister: v4l2_device_unregister(&vpif_obj.v4l2_dev); +vpif_free: + for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) + kfree(vpif_obj.dev[i]); return err; }