linux-kernel - [PATCH 1/3] mm/pagewalk.c: fix end address calculation in walk_page

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: <1393475977-3381-2-git-send-email-n-horiguchi@ah.jp.nec.com>
Date:	Wed, 26 Feb 2014 23:39:35 -0500
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] mm/pagewalk.c: fix end address calculation in walk_page_range()

When we try to walk over inside a vma, walk_page_range() tries to walk
until vma->vm_end even if a given end is before that point.
So this patch takes the smaller one as an end address.

Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
---
 mm/pagewalk.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git next-20140220.orig/mm/pagewalk.c next-20140220/mm/pagewalk.c
index 416e981243b1..b418407ff4da 100644
--- next-20140220.orig/mm/pagewalk.c
+++ next-20140220/mm/pagewalk.c
@@ -321,8 +321,9 @@ int walk_page_range(unsigned long start, unsigned long end,
 			next = vma->vm_start;
 		} else { /* inside the found vma */
 			walk->vma = vma;
-			next = vma->vm_end;
-			err = walk_page_test(start, end, walk);
+			next = min_t(unsigned long, end, vma->vm_end);
+
+			err = walk_page_test(start, next, walk);
 			if (skip_lower_level_walking(walk))
 				continue;
 			if (err)
-- 
1.8.5.3

--
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/