From nobody Sat Oct 25 21:45:32 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1521495865667868.9498697677251; Mon, 19 Mar 2018 14:44:25 -0700 (PDT) Received: from localhost ([::1]:44125 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ey2Zl-0005hv-AQ for importer@patchew.org; Mon, 19 Mar 2018 17:44:17 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36515) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ey2NA-0003VM-3C for qemu-devel@nongnu.org; Mon, 19 Mar 2018 17:31:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ey2N5-0005Ji-77 for qemu-devel@nongnu.org; Mon, 19 Mar 2018 17:31:16 -0400 Received: from sauhun.de ([88.99.104.3]:57191 helo=pokefinder.org) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ey2N5-0005Hw-0p for qemu-devel@nongnu.org; Mon, 19 Mar 2018 17:31:11 -0400 Received: from localhost (p54B3377B.dip0.t-ipconnect.de [84.179.55.123]) by pokefinder.org (Postfix) with ESMTPSA id EFA082C6FD7; Mon, 19 Mar 2018 22:31:08 +0100 (CET) From: Wolfram Sang To: qemu-devel@nongnu.org Date: Mon, 19 Mar 2018 22:30:59 +0100 Message-Id: <20180319213101.6100-2-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180319213101.6100-1-wsa+renesas@sang-engineering.com> References: <20180319213101.6100-1-wsa+renesas@sang-engineering.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 88.99.104.3 Subject: [Qemu-devel] [PATCH v2 1/3] nvram: at24c: prevent segfault by checking "rom-size" 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: linux-renesas-soc@vger.kernel.org, Wolfram Sang , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The value for "rom-size" is used as a divisor, so it must not be 0 or it will segfault. A size of 0 wouldn't make sense anyhow. Signed-off-by: Wolfram Sang Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- hw/nvram/eeprom_at24c.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/nvram/eeprom_at24c.c b/hw/nvram/eeprom_at24c.c index 22183f5360..ccf78b25e4 100644 --- a/hw/nvram/eeprom_at24c.c +++ b/hw/nvram/eeprom_at24c.c @@ -121,6 +121,11 @@ int at24c_eeprom_init(I2CSlave *i2c) { EEPROMState *ee =3D AT24C_EE(i2c); =20 + if (!ee->rsize) { + ERR("rom-size not allowed to be 0\n"); + exit(1); + } + ee->mem =3D g_malloc0(ee->rsize); =20 if (ee->blk) { --=20 2.11.0