From patchwork Tue May 3 10:22:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King X-Patchwork-Id: 9002481 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E0049BF29F for ; Tue, 3 May 2016 10:38:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 148D720145 for ; Tue, 3 May 2016 10:38:46 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 48BC62010C for ; Tue, 3 May 2016 10:38:45 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1axXhX-00019Y-Df; Tue, 03 May 2016 10:37:11 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1axXhV-000113-8c for linux-arm-kernel@bombadil.infradead.org; Tue, 03 May 2016 10:37:09 +0000 Received: from pandora.arm.linux.org.uk ([2001:4d48:ad52:3201:214:fdff:fe10:1be6]) by casper.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1axXZY-00021w-UZ for linux-arm-kernel@lists.infradead.org; Tue, 03 May 2016 10:28:57 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=pandora-2014; h=Date:Sender:Message-Id:Content-Type:Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References:In-Reply-To; bh=cMwgVc2C3hHDAPfeAA55BDLh5x9r/ohN4bPAlhllvjw=; b=DaVRoD+GP2FDWU5Ybcq6KqH/E+yurWXvQdUPXoSDArvrU4NFGd4TaSf7I5P5lslOLZpm9QslCPiW827pkENwRnhgrC/SAa0okcRb3f1XOWieXfE2nBN+aX1FGKkzMuzxVwoYpoTIWf+HEglG5qdL+2+30lorrDMIiOjTnO3zbbc=; Received: from [2002:4e20:1eda:1:452d:3855:1c55:6d46] (port=42736 helo=e0050434b2927.dyn.arm.linux.org.uk) by pandora.arm.linux.org.uk with esmtpsa (TLSv1:DHE-RSA-AES128-SHA:128) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1axXTa-0004xp-KC; Tue, 03 May 2016 11:22:47 +0100 Received: from rmk by e0050434b2927.dyn.arm.linux.org.uk with local (Exim 4.82) (envelope-from ) id 1axXTQ-0004ih-NN; Tue, 03 May 2016 11:22:36 +0100 In-Reply-To: References: From: Russell King To: kexec@lists.infradead.org,linux-arm-kernel@lists.infradead.org Subject: [PATCH kexec-tools 18/32] arm: report if crash kernel is out of bounds MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Tue, 03 May 2016 11:22:36 +0100 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160503_112857_159822_DF51BD30 X-CRM114-Status: GOOD ( 13.85 ) X-Spam-Score: -4.3 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Pratyush Anand Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Report an error if the crash kernel memory region is outside of the boot-view memory range - this can happen with systems such as Keystone 2. Signed-off-by: Russell King --- kexec/arch/arm/crashdump-arm.c | 11 +++++++++++ kexec/arch/arm/crashdump-arm.h | 1 + 2 files changed, 12 insertions(+) diff --git a/kexec/arch/arm/crashdump-arm.c b/kexec/arch/arm/crashdump-arm.c index fcc4d42..739c906 100644 --- a/kexec/arch/arm/crashdump-arm.c +++ b/kexec/arch/arm/crashdump-arm.c @@ -365,6 +365,17 @@ int load_crashdump_segments(struct kexec_info *info, char *mod_cmdline) if (get_kernel_page_offset(info, &elf_info)) return -1; + /* + * Ensure that the crash kernel memory range is sane. The crash kernel + * must be located within memory which is visible during booting. + */ + if (crash_reserved_mem.end > ARM_MAX_VIRTUAL) { + fprintf(stderr, + "Crash kernel memory [0x%llx-0x%llx] is inaccessible at boot - unable to load crash kernel\n", + crash_reserved_mem.start, crash_reserved_mem.end); + return -1; + } + last_ranges = usablemem_rgns.size - 1; if (last_ranges < 0) last_ranges = 0; diff --git a/kexec/arch/arm/crashdump-arm.h b/kexec/arch/arm/crashdump-arm.h index 2dbde04..7314960 100644 --- a/kexec/arch/arm/crashdump-arm.h +++ b/kexec/arch/arm/crashdump-arm.h @@ -9,6 +9,7 @@ extern "C" { #define DEFAULT_PAGE_OFFSET (0xc0000000) #define KVBASE_MASK (0x1ffffff) #define CRASH_MAX_MEMORY_RANGES 32 +#define ARM_MAX_VIRTUAL UINT32_MAX extern struct memory_ranges usablemem_rgns;