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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 BB8B2CA9EA9 for ; Fri, 18 Oct 2019 22:17:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 824BF20679 for ; Fri, 18 Oct 2019 22:17:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571437037; bh=OxJUN0GrULCx4YrxlFaDCHBM54iQLptJdAzFRmA69q8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tNsd/tzkGSdvLv+6ieiXdP8xM+TLfzJFYIEIWmGuY79lgW7fYNsgs2lrnbaYYpP0j /y04bTQZJxKhuLl6XY8yTEszsgv2b6bRWJFiBYij6ZodaBZDeL+dLDzRTl1PUfuJny 1xo/53dHK2sbNjERVydicgpY8uprz9/nXUX+/yX0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387418AbfJRWRN (ORCPT ); Fri, 18 Oct 2019 18:17:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:40166 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733212AbfJRWHr (ORCPT ); Fri, 18 Oct 2019 18:07:47 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CC8F422459; Fri, 18 Oct 2019 22:07:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571436466; bh=OxJUN0GrULCx4YrxlFaDCHBM54iQLptJdAzFRmA69q8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W1O7+QvaHKb4knug6yzYqR/WtF+fzaFajLaFG+xdrdo/IbU/ofFY04maW3S9YxMA7 jN6sOaSgWs2qvo12GinJ5hHo+J19FVPdv756MX9jfVwF5BFMoMdD6xgnU5vazdd7Pr xHGm4I0Erl1Z3YGstxGS4Y2FKU8J5ALEIFhefSsA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Navid Emamdoost , Hans de Goede , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH AUTOSEL 4.19 096/100] virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr Date: Fri, 18 Oct 2019 18:05:21 -0400 Message-Id: <20191018220525.9042-96-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191018220525.9042-1-sashal@kernel.org> References: <20191018220525.9042-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Navid Emamdoost [ Upstream commit e0b0cb9388642c104838fac100a4af32745621e2 ] In hgcm_call_preprocess_linaddr memory is allocated for bounce_buf but is not released if copy_form_user fails. In order to prevent memory leak in case of failure, the assignment to bounce_buf_ret is moved before the error check. This way the allocated bounce_buf will be released by the caller. Fixes: 579db9d45cb4 ("virt: Add vboxguest VMMDEV communication code") Signed-off-by: Navid Emamdoost Reviewed-by: Hans de Goede Link: https://lore.kernel.org/r/20190930204223.3660-1-navid.emamdoost@gmail.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/virt/vboxguest/vboxguest_utils.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/virt/vboxguest/vboxguest_utils.c b/drivers/virt/vboxguest/vboxguest_utils.c index bf4474214b4d3..92091006589a9 100644 --- a/drivers/virt/vboxguest/vboxguest_utils.c +++ b/drivers/virt/vboxguest/vboxguest_utils.c @@ -217,6 +217,8 @@ static int hgcm_call_preprocess_linaddr( if (!bounce_buf) return -ENOMEM; + *bounce_buf_ret = bounce_buf; + if (copy_in) { ret = copy_from_user(bounce_buf, (void __user *)buf, len); if (ret) @@ -225,7 +227,6 @@ static int hgcm_call_preprocess_linaddr( memset(bounce_buf, 0, len); } - *bounce_buf_ret = bounce_buf; hgcm_call_add_pagelist_size(bounce_buf, len, extra); return 0; } -- 2.20.1