From patchwork Tue Apr 7 04:35:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 1267170 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.a=rsa-sha256 header.s=201602 header.b=cmFL7lc1; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48xF4B3dZgz9sSG for ; Tue, 7 Apr 2020 14:36:57 +1000 (AEST) Received: from localhost ([::1]:40988 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jLfyn-0007yT-Nz for incoming@patchwork.ozlabs.org; Tue, 07 Apr 2020 00:36:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52272) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jLfyK-0007xs-DF for qemu-devel@nongnu.org; Tue, 07 Apr 2020 00:36:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jLfyJ-0004Aq-EG for qemu-devel@nongnu.org; Tue, 07 Apr 2020 00:36:24 -0400 Received: from ozlabs.org ([2401:3900:2:1::2]:48261) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jLfyH-00045Q-QU; Tue, 07 Apr 2020 00:36:23 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 48xF3K0Dqfz9sR4; Tue, 7 Apr 2020 14:36:12 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1586234173; bh=hHIGRjoFYCwEG4FYc0AkcpQkI4ODTreh/O1iHm8vwyg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cmFL7lc1mD/Ev/HAAS8Te0JtMPNiB4gyeL05NMdvX8DMYMmLXQwtfFmpCKXqaUXJ7 Q7rS24JdyHnETg3XLJxYIm8bEotBhCU+CDo8eiPnDPegp1QTkQvrrJzoVXDoSzh/zR SvS/yuqOPfBCD7rWs0F+4zfcxdmxF6tYFqQPAH+A= From: David Gibson To: peter.maydell@linaro.org Subject: [PULL 01/10] hw/ppc/e500.c: Handle qemu_find_file() failure Date: Tue, 7 Apr 2020 14:35:57 +1000 Message-Id: <20200407043606.291546-2-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.25.2 In-Reply-To: <20200407043606.291546-1-david@gibson.dropbear.id.au> References: <20200407043606.291546-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 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: aik@ozlabs.ru, qemu-devel@nongnu.org, groug@kaod.org, qemu-ppc@nongnu.org, clg@kaod.org, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , David Gibson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Peter Maydell If qemu_find_file() doesn't find the BIOS it returns NULL; we were passing that unchecked through to load_elf(), which assumes a non-NULL pointer and may misbehave. In practice it fails with a weird message: $ qemu-system-ppc -M ppce500 -display none -kernel nonesuch Bad address qemu-system-ppc: could not load firmware '(null)' Handle the failure case better: $ qemu-system-ppc -M ppce500 -display none -kernel nonesuch qemu-system-ppc: could not find firmware/kernel file 'nonesuch' Spotted by Coverity (CID 1238954). Signed-off-by: Peter Maydell Message-Id: <20200324121216.23899-1-peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: David Gibson --- hw/ppc/e500.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c index 854cd3ac46..0d1f41197c 100644 --- a/hw/ppc/e500.c +++ b/hw/ppc/e500.c @@ -1047,6 +1047,10 @@ void ppce500_init(MachineState *machine) } filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, payload_name); + if (!filename) { + error_report("could not find firmware/kernel file '%s'", payload_name); + exit(1); + } payload_size = load_elf(filename, NULL, NULL, NULL, &bios_entry, &loadaddr, NULL, NULL,