From patchwork Thu Mar 5 15:06:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arvind Sankar X-Patchwork-Id: 11422053 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 341FA92A for ; Thu, 5 Mar 2020 15:06:55 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 99C702073D for ; Thu, 5 Mar 2020 15:06:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 99C702073D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=alum.mit.edu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-18073-patchwork-kernel-hardening=patchwork.kernel.org@lists.openwall.com Received: (qmail 6046 invoked by uid 550); 5 Mar 2020 15:06:53 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Delivered-To: mailing list kernel-hardening@lists.openwall.com Received: (qmail 6014 invoked from network); 5 Mar 2020 15:06:52 -0000 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=4YtauhyBuYarI81yGagt2ohXVIXr6pZDvPOFIfRFrBo=; b=q/UdXQlL1+yp/ySXt5kuEwWTbo+twiE/aNdW72DBJ4z+nuuw1JEKFsEADHAkL+SSnG gly4oMrIIDUWGJ9OkVQAgP3MkD/0DSOUXAQF9kB92vqHB8E0NU4B7Ub8XEqzoyEe3Zp9 xBIQuvhaA6MEqF26pNsXAfhVJxJzwQ1m4WnG75pTbnOqLSrIcvv4jz+/tC8JpvLgAOsi XpcEkp95Ad2TbTug4oDPWJKriW3pcuWQ7IcmYV25uryn+GcfretII3F0Jn9L2aH9F5ob aR7SYPA9KlKzZUakPtMqpGieG1BJyxp0UBIl/vcNzZvcLtpin8kcD+eAQOQ6UdGT/cGu wrGw== X-Gm-Message-State: ANhLgQ1xFEZQ6BmkrKDNyk79EJu6lKE8iDy03w8dpsp3ZTmVGnt4Taqw g1ko6bMZKFOr9Vzodiaro/w= X-Google-Smtp-Source: ADFU+vt4PIOV75cKuujfyu22jJMx8631ltXW5tt1iRMuoUZFlcy2KbEnmXQTIcni8S134YaBPpbl7w== X-Received: by 2002:a0c:9081:: with SMTP id p1mr4587490qvp.38.1583420800482; Thu, 05 Mar 2020 07:06:40 -0800 (PST) From: Arvind Sankar To: Kees Cook Cc: "Tobin C . Harding" , Tycho Andersen , kernel-hardening@lists.openwall.com, Nick Hu , Greentime Hu , Vincent Chen , linux-kernel@vger.kernel.org Subject: [PATCH] nds32/mm: Stop printing the virtual memory layout Date: Thu, 5 Mar 2020 10:06:39 -0500 Message-Id: <20200305150639.834129-1-nivedita@alum.mit.edu> X-Mailer: git-send-email 2.24.1 In-Reply-To: <202003021038.8F0369D907@keescook> References: <202003021038.8F0369D907@keescook> MIME-Version: 1.0 For security, don't display the kernel's virtual memory layout. Kees Cook points out: "These have been entirely removed on other architectures, so let's just do the same for ia32 and remove it unconditionally." 071929dbdd86 ("arm64: Stop printing the virtual memory layout") 1c31d4e96b8c ("ARM: 8820/1: mm: Stop printing the virtual memory layout") 31833332f798 ("m68k/mm: Stop printing the virtual memory layout") fd8d0ca25631 ("parisc: Hide virtual kernel memory layout") adb1fe9ae2ee ("mm/page_alloc: Remove kernel address exposure in free_reserved_area()") Signed-off-by: Arvind Sankar Acked-by: Tycho Andersen --- arch/nds32/mm/init.c | 30 ------------------------------ 1 file changed, 30 deletions(-) diff --git a/arch/nds32/mm/init.c b/arch/nds32/mm/init.c index 0be3833f6814..1c1e79b4407c 100644 --- a/arch/nds32/mm/init.c +++ b/arch/nds32/mm/init.c @@ -205,36 +205,6 @@ void __init mem_init(void) memblock_free_all(); mem_init_print_info(NULL); - pr_info("virtual kernel memory layout:\n" - " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" -#ifdef CONFIG_HIGHMEM - " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n" -#endif - " consist : 0x%08lx - 0x%08lx (%4ld MB)\n" - " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" - " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" - " .init : 0x%08lx - 0x%08lx (%4ld kB)\n" - " .data : 0x%08lx - 0x%08lx (%4ld kB)\n" - " .text : 0x%08lx - 0x%08lx (%4ld kB)\n", - FIXADDR_START, FIXADDR_TOP, (FIXADDR_TOP - FIXADDR_START) >> 10, -#ifdef CONFIG_HIGHMEM - PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE, - (LAST_PKMAP * PAGE_SIZE) >> 10, -#endif - CONSISTENT_BASE, CONSISTENT_END, - ((CONSISTENT_END) - (CONSISTENT_BASE)) >> 20, VMALLOC_START, - (unsigned long)VMALLOC_END, (VMALLOC_END - VMALLOC_START) >> 20, - (unsigned long)__va(memory_start), (unsigned long)high_memory, - ((unsigned long)high_memory - - (unsigned long)__va(memory_start)) >> 20, - (unsigned long)&__init_begin, (unsigned long)&__init_end, - ((unsigned long)&__init_end - - (unsigned long)&__init_begin) >> 10, (unsigned long)&_etext, - (unsigned long)&_edata, - ((unsigned long)&_edata - (unsigned long)&_etext) >> 10, - (unsigned long)&_text, (unsigned long)&_etext, - ((unsigned long)&_etext - (unsigned long)&_text) >> 10); - /* * Check boundaries twice: Some fundamental inconsistencies can * be detected at build time already.