From patchwork Sat Jul 15 13:28:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Herv=C3=A9_Poussineau?= X-Patchwork-Id: 9842411 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 64F77602D8 for ; Sat, 15 Jul 2017 13:30:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5457228703 for ; Sat, 15 Jul 2017 13:30:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4954528747; Sat, 15 Jul 2017 13:30:46 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CD5BF28703 for ; Sat, 15 Jul 2017 13:30:45 +0000 (UTC) Received: from localhost ([::1]:42146 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dWN9h-00045b-1l for patchwork-qemu-devel@patchwork.kernel.org; Sat, 15 Jul 2017 09:30:45 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43393) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dWN8R-00043a-8A for qemu-devel@nongnu.org; Sat, 15 Jul 2017 09:29:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dWN8Q-00038B-CZ for qemu-devel@nongnu.org; Sat, 15 Jul 2017 09:29:27 -0400 Received: from smtp4-g21.free.fr ([2a01:e0c:1:1599::13]:37817) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dWN8O-00037a-1z; Sat, 15 Jul 2017 09:29:24 -0400 Received: from localhost.localdomain (unknown [IPv6:2a01:e34:ee6b:9c80:6267:20ff:fe65:a488]) by smtp4-g21.free.fr (Postfix) with ESMTP id D981119F5A1; Sat, 15 Jul 2017 15:29:17 +0200 (CEST) From: =?UTF-8?q?Herv=C3=A9=20Poussineau?= To: qemu-devel@nongnu.org Date: Sat, 15 Jul 2017 15:28:41 +0200 Message-Id: <20170715132841.9865-5-hpoussin@reactos.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170715132841.9865-1-hpoussin@reactos.org> References: <20170715132841.9865-1-hpoussin@reactos.org> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Windows NT kernel [generic] [fuzzy] X-Received-From: 2a01:e0c:1:1599::13 Subject: [Qemu-devel] [PATCH 4/4] vvfat: initialize memory after allocating it X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?UTF-8?q?Herv=C3=A9=20Poussineau?= , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This prevents some host to guest memory content leaks. Fixes: https://bugs.launchpad.net/qemu/+bug/1599539 Signed-off-by: Hervé Poussineau --- block/vvfat.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/vvfat.c b/block/vvfat.c index afc6170a69..7340decef3 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -115,6 +115,7 @@ static inline int array_ensure_allocated(array_t* array, int index) array->pointer = g_realloc(array->pointer, new_size); if (!array->pointer) return -1; + memset(array->pointer + array->size, 0, new_size - array->size); array->size = new_size; array->next = index + 1; }