From: Yan Zheng <yanzheng@21cn.com>
Date: Mon, 8 Oct 2007 17:08:37 +0000 (-0700)
Subject: fix page release issue in filemap_fault
X-Git-Tag: v2.6.23~8
X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=745ad48e8cac47beec0b2f72dc3c64424bce1fec

fix page release issue in filemap_fault

find_lock_page increases page's usage count, we should decrease it
before return VM_FAULT_SIGBUS

Signed-off-by: Yan Zheng<yanzheng@21cn.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/filemap.c b/mm/filemap.c
index 90b657b..15c8413 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1388,6 +1388,7 @@ retry_find:
 	size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 	if (unlikely(vmf->pgoff >= size)) {
 		unlock_page(page);
+		page_cache_release(page);
 		goto outside_data_content;
 	}