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=-19.1 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=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 54A29C43600 for ; Thu, 20 May 2021 11:28:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2CCDC60FF0 for ; Thu, 20 May 2021 11:28:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241738AbhETL3T (ORCPT ); Thu, 20 May 2021 07:29:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:55230 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240255AbhETLJg (ORCPT ); Thu, 20 May 2021 07:09:36 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EA5B161D38; Thu, 20 May 2021 10:06:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621505203; bh=+a7wLmhsn1Ba8Q7V1xVSuyTg7cXW3/lZZGu66B9ZRzE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zawMvMo0aFtaxJgoPRnHneIa3kRny6l7YCqlZVe/5F1MzTV+LypBoiWN7K5fhx2Zs KKLsbb2r0j6DdnLAaK7jQ8OgN1Ed/pGLBI7vtYyt55S/mgrq40UJ+IJ+BwFRZdk0IE eOSV7kMKnljFsSVOFUV/QwtD/Sz7py97bDkwMjf0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+889397c820fa56adf25d@syzkaller.appspotmail.com, Muhammad Usama Anjum , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.4 028/190] media: em28xx: fix memory leak Date: Thu, 20 May 2021 11:21:32 +0200 Message-Id: <20210520092103.103072078@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092102.149300807@linuxfoundation.org> References: <20210520092102.149300807@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Muhammad Usama Anjum [ Upstream commit 0ae10a7dc8992ee682ff0b1752ff7c83d472eef1 ] If some error occurs, URB buffers should also be freed. If they aren't freed with the dvb here, the em28xx_dvb_fini call doesn't frees the URB buffers as dvb is set to NULL. The function in which error occurs should do all the cleanup for the allocations it had done. Tested the patch with the reproducer provided by syzbot. This patch fixes the memleak. Reported-by: syzbot+889397c820fa56adf25d@syzkaller.appspotmail.com Signed-off-by: Muhammad Usama Anjum Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/usb/em28xx/em28xx-dvb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c b/drivers/media/usb/em28xx/em28xx-dvb.c index 5502a0fb94fd..a19c89009bf3 100644 --- a/drivers/media/usb/em28xx/em28xx-dvb.c +++ b/drivers/media/usb/em28xx/em28xx-dvb.c @@ -1757,6 +1757,7 @@ ret: return result; out_free: + em28xx_uninit_usb_xfer(dev, EM28XX_DIGITAL_MODE); kfree(dvb); dev->dvb = NULL; goto ret; -- 2.30.2