From: Oleg Drokin <green@linuxhacker.ru>
Date: Fri, 2 Dec 2005 20:57:52 +0000 (+0000)
Subject: [PATCH] 32bit integer overflow in invalidate_inode_pages2()
X-Git-Tag: v2.6.14.4~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98afa67a80120871af9286786dbba19bc7517df7;p=thirdparty%2Fkernel%2Fstable.git

[PATCH] 32bit integer overflow in invalidate_inode_pages2()

Fix a 32 bit integer overflow in invalidate_inode_pages2_range.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/mm/truncate.c b/mm/truncate.c
index 60c8764bfac2e..0dff870c80a18 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -291,8 +291,8 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 					 * Zap the rest of the file in one hit.
 					 */
 					unmap_mapping_range(mapping,
-					    page_index << PAGE_CACHE_SHIFT,
-					    (end - page_index + 1)
+					   (loff_t)page_index<<PAGE_CACHE_SHIFT,
+					   (loff_t)(end - page_index + 1)
 							<< PAGE_CACHE_SHIFT,
 					    0);
 					did_range_unmap = 1;
@@ -301,7 +301,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 					 * Just zap this page
 					 */
 					unmap_mapping_range(mapping,
-					  page_index << PAGE_CACHE_SHIFT,
+					  (loff_t)page_index<<PAGE_CACHE_SHIFT,
 					  PAGE_CACHE_SIZE, 0);
 				}
 			}