linux-kernel - [PATCH]fix page release issue in filemap

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Date:	Mon, 8 Oct 2007 23:28:07 +0800
From:	"Yan Zheng" <yanzheng@...n.com>
To:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: [PATCH]fix page release issue in filemap_fault

Hi all

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

Signed-off-by: Yan Zheng<yanzheng@...n.com>
----
diff -ur linux-2.6.23-rc9/mm/filemap.c linux/mm/filemap.c
--- linux-2.6.23-rc9/mm/filemap.c	2007-10-07 15:03:33.000000000 +0800
+++ linux/mm/filemap.c	2007-10-08 23:14:39.000000000 +0800
@@ -1388,6 +1388,7 @@
 	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;
 	}
-
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