linux-kernel - [tip:x86/mm] x86, ioremap: Fix normal ram range check

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tip-2233576bf7b5d246593c3e06cab74d879b32b949@git.kernel.org>
Date:	Fri, 9 Jul 2010 18:31:29 GMT
From:	tip-bot for Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	kaneshige.kenji@...fujitsu.com, tglx@...utronix.de,
	hpa@...ux.intel.com
Subject: [tip:x86/mm] x86, ioremap: Fix normal ram range check

Commit-ID:  2233576bf7b5d246593c3e06cab74d879b32b949
Gitweb:     http://git.kernel.org/tip/2233576bf7b5d246593c3e06cab74d879b32b949
Author:     Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
AuthorDate: Thu, 17 Jun 2010 10:31:11 +0900
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Fri, 9 Jul 2010 10:51:56 -0700

x86, ioremap: Fix normal ram range check

Check for normal RAM in x86 ioremap() code seems to not work for the
last page frame in the specified physical address range.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
LKML-Reference: <4C197ADF.90509@...fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/mm/ioremap.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 9c8e3a7..299e4eb 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -101,7 +101,7 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
 	 * Don't allow anybody to remap normal RAM that we're using..
 	 */
 	last_pfn = last_addr >> PAGE_SHIFT;
-	for (pfn = phys_addr >> PAGE_SHIFT; pfn < last_pfn; pfn++) {
+	for (pfn = phys_addr >> PAGE_SHIFT; pfn <= last_pfn; pfn++) {
 		int is_ram = page_is_ram(pfn);
 
 		if (is_ram && pfn_valid(pfn) && !PageReserved(pfn_to_page(pfn)))
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/