From patchwork Thu May 20 09:19:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 444295 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 9DF09C433B4 for ; Thu, 20 May 2021 10:25:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7765C6101D for ; Thu, 20 May 2021 10:25:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236374AbhETK0U (ORCPT ); Thu, 20 May 2021 06:26:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:55788 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236799AbhETKYb (ORCPT ); Thu, 20 May 2021 06:24:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 438E96146D; Thu, 20 May 2021 09:49:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504164; bh=uh11iCPGGtC1rPCM0dfRNuyJonGJ/oC7OhpilX93Mqw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sU1nw1eBffFWsu1CNeOGVpzV1v2w7qLPX3/Wm96dK6/y+NOeuv8Mw7Qs1HL96mewq rezIuxeCYzX/tzf8oakkjhrCaeUUtyh4UC3ve8geKJ3/KFacWCFPR+agleU2PmFL/+ +cMrFWzcaj63Wwy+7EcTgkfUDqYk1pX3Ec7eFdXg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+7f09440acc069a0d38ac@syzkaller.appspotmail.com, Peilin Ye , Mauro Carvalho Chehab Subject: [PATCH 4.14 094/323] media: dvbdev: Fix memory leak in dvb_media_device_free() Date: Thu, 20 May 2021 11:19:46 +0200 Message-Id: <20210520092123.322986966@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092120.115153432@linuxfoundation.org> References: <20210520092120.115153432@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Peilin Ye commit bf9a40ae8d722f281a2721779595d6df1c33a0bf upstream. dvb_media_device_free() is leaking memory. Free `dvbdev->adapter->conn` before setting it to NULL, as documented in include/media/media-device.h: "The media_entity instance itself must be freed explicitly by the driver if required." Link: https://syzkaller.appspot.com/bug?id=9bbe4b842c98f0ed05c5eed77a226e9de33bf298 Link: https://lore.kernel.org/linux-media/20201211083039.521617-1-yepeilin.cs@gmail.com Cc: stable@vger.kernel.org Fixes: 0230d60e4661 ("[media] dvbdev: Add RF connector if needed") Reported-by: syzbot+7f09440acc069a0d38ac@syzkaller.appspotmail.com Signed-off-by: Peilin Ye Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/dvb-core/dvbdev.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/media/dvb-core/dvbdev.c +++ b/drivers/media/dvb-core/dvbdev.c @@ -218,6 +218,7 @@ static void dvb_media_device_free(struct if (dvbdev->adapter->conn) { media_device_unregister_entity(dvbdev->adapter->conn); + kfree(dvbdev->adapter->conn); dvbdev->adapter->conn = NULL; kfree(dvbdev->adapter->conn_pads); dvbdev->adapter->conn_pads = NULL;