From nobody Mon Feb 9 08:41:18 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1592687309; cv=none; d=zohomail.com; s=zohoarc; b=cqxHjO/VsVsFO0Ee/UyhRGXvWZtnhcNmplPk1G59eiTRCcsJfmuMyAbAA+81sH5pLzKKty2U9hAhQuVOJxTHKGxIhAF1aJqQexQ5kHXQblP3Jr92C8DLo496XQO3eGxQQLMvuLgaU3gKoF6j3j7f4LQlZ+oiqlSLRb5lnRhDVEs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1592687309; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=K0ERlkY9R9wlaQZ2YN4xq2BlYpSmDukzJVeRxNrnljU=; b=Bdd/3bapWqYyRr2w4wH50u889zHMlzOv/NURFGchEqTEsnTCs600s5AtAKuYgQh4WGm92rgEYV9bHNDWUKVr50mlpLmjn1HUgI2YNbRcq+K20A9Pu1bT3IlgXndFGmgm3YvZZFc91HKHbd1FC9NYFH5vDOQDeEV7EUKkliDZvvM= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1592687309876168.59290595021184; Sat, 20 Jun 2020 14:08:29 -0700 (PDT) Received: from localhost ([::1]:57344 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jmkiy-0003TF-ED for importer@patchew.org; Sat, 20 Jun 2020 17:08:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53476) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jmkfQ-0005Lq-Go for qemu-devel@nongnu.org; Sat, 20 Jun 2020 17:04:48 -0400 Received: from zero.eik.bme.hu ([2001:738:2001:2001::2001]:54114) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jmkfO-0001mK-NW for qemu-devel@nongnu.org; Sat, 20 Jun 2020 17:04:48 -0400 Received: from zero.eik.bme.hu (blah.eik.bme.hu [152.66.115.182]) by localhost (Postfix) with SMTP id 62C5E748DE4; Sat, 20 Jun 2020 23:04:33 +0200 (CEST) Received: by zero.eik.bme.hu (Postfix, from userid 432) id DB1BD748DDB; Sat, 20 Jun 2020 23:04:32 +0200 (CEST) Message-Id: <26d4fa9b8ce81e2723e98d592ccba7550042752c.1592686588.git.balaton@eik.bme.hu> In-Reply-To: References: From: BALATON Zoltan Subject: [PATCH v3 7/9] sm501: Do not allow guest to set invalid format Date: Sat, 20 Jun 2020 22:56:28 +0200 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable To: qemu-devel@nongnu.org X-Spam-Probability: 8% Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2001:738:2001:2001::2001; envelope-from=balaton@eik.bme.hu; helo=zero.eik.bme.hu X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Sebastian Bauer , Magnus Damm , Gerd Hoffmann , Aurelien Jarno Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Prevent guest setting invalid format value that might trip checks in sm501_2d_operation(). Signed-off-by: BALATON Zoltan Reviewed-by: Peter Maydell --- hw/display/sm501.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/display/sm501.c b/hw/display/sm501.c index 6349f31e64..7e4c042d52 100644 --- a/hw/display/sm501.c +++ b/hw/display/sm501.c @@ -1503,6 +1503,9 @@ static void sm501_2d_engine_write(void *opaque, hwadd= r addr, s->twoD_background =3D value; break; case SM501_2D_STRETCH: + if (((value >> 20) & 3) =3D=3D 3) { + value &=3D ~BIT(20); + } s->twoD_stretch =3D value; break; case SM501_2D_COLOR_COMPARE: --=20 2.21.3