From patchwork Thu May 20 09:20:27 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: 445435 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 CC087C43460 for ; Thu, 20 May 2021 10:49:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B318361019 for ; Thu, 20 May 2021 10:49:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238351AbhETKvN (ORCPT ); Thu, 20 May 2021 06:51:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:48144 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238422AbhETKse (ORCPT ); Thu, 20 May 2021 06:48:34 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 17EE461CB4; Thu, 20 May 2021 09:58:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504725; bh=lnTHb0XBA1ZGFqlEoYHD66Ub6vmZTvOJipcheChA4+4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fZdBRgiddSkneXpCYE7d8+jWXc7JUkNleAWPzhrqDnlXzXAl6CCEmlHWcNg4p45bs tWxkCZqBq3czaZtt1uOHS09L6SQPPz8Mdl9x3Qvhpp3FddIAUK3n6+qqs4ALs2M1F+ OKHJ6RnWP1joVgttbLmG43F1Fvj3RZm2X/ITt08g= 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 4.9 035/240] media: em28xx: fix memory leak Date: Thu, 20 May 2021 11:20:27 +0200 Message-Id: <20210520092109.835948240@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092108.587553970@linuxfoundation.org> References: <20210520092108.587553970@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@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 b0aea48907b7..7e259be47252 100644 --- a/drivers/media/usb/em28xx/em28xx-dvb.c +++ b/drivers/media/usb/em28xx/em28xx-dvb.c @@ -1967,6 +1967,7 @@ ret: return result; out_free: + em28xx_uninit_usb_xfer(dev, EM28XX_DIGITAL_MODE); kfree(dvb); dev->dvb = NULL; goto ret;