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: 185221 Delivered-To: patch@linaro.org Received: by 2002:a92:de47:0:0:0:0:0 with SMTP id e7csp4434267ilr; Mon, 6 Apr 2020 21:36:41 -0700 (PDT) X-Google-Smtp-Source: APiQypLaX1w30NSfeM8ldMJUDPVleXgncokEoP7/CcGZEzKg5Gmyc5NHgFyO1Y9tmLBlnI7J95Fu X-Received: by 2002:ac8:514c:: with SMTP id h12mr613745qtn.268.1586234201068; Mon, 06 Apr 2020 21:36:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1586234201; cv=none; d=google.com; s=arc-20160816; b=OgSK/KiLu5r1B3yAajoNzC7iGSovSs1KgK6D4VnXIvR8pUw7fMCfPFh8MhYIoP/XZC 18usex4eJnrATo/8qHeJdM9PxHTO7JVECecLdvOkxaIKxi9cmGhjH0N0zBdQFeSE6YI5 bMFOU9RmFQSxQFDiLlhBEz9FKr72bkgQCDhMebucllZGFVFzZTWG/oJJSdpnnuZM+9Np JOu/Op3CXL6xjEDdOuGHEKMWy/UZGZUs3DQxgW9gbA5ahQBQVrRPsHqyDMbnTwQn0gSY Rj9lR4GA1LiTzWR/+xRpWJXJZKkRDi2/yFg9xl8w0+odfxR27Zssi+IbZulL2P/4lDAZ s1fw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:to:from :dkim-signature; bh=HS3oFe4drWUjptxn2eG6bAMW+766RKu9wS0DwWeWdNE=; b=X1kOVmES600ZZbmsH1NnST2BUnK288hPVmwfnHRAgw0WxYZB0x5EBm3YH79zZI8Nzr 798rTorAM01Au6d6sD6zntuIZXYQhniIyv/5M8Y8I+xkWZ6omU+Bp3l8ssxYMP8FEvoZ jlaMvZFuY8SouExE57fSC7ItholrEMHA8QUqX7CTLgi3/bgFjMLJUT2n1oroaC44MJYh Gxgscm27YjqiXIn+s9k9OIsz8OkpJVuFUWLSh809SU0FRu3oTqjF2m+4GjlMR7PyQByK SA2AfMUa8wyF078evbaCcDdTCz17ZD16iBcGSze8ctmZq8svkBKcTzq5ZYF0gOOa0m22 0Y3Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@gibson.dropbear.id.au header.s=201602 header.b=cmFL7lc1; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org" Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id h196si1179638qke.275.2020.04.06.21.36.40 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 06 Apr 2020 21:36:41 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@gibson.dropbear.id.au header.s=201602 header.b=cmFL7lc1; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org" Received: from localhost ([::1]:40988 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jLfyZ-0007yT-Hi for patch@linaro.org; Tue, 07 Apr 2020 00:36:39 -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+patch=linaro.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(+) -- 2.25.2 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,