From 2252b62a56601c9e31396da230b4ce792f167fb4 Mon Sep 17 00:00:00 2001
From: Younger Liu <liuyiyang@hisense.com>
Date: Thu, 23 Jan 2014 15:53:47 -0800
Subject: [PATCH] logfs: check for the return value after calling
find_or_create_page()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In get_mapping_page(), after calling find_or_create_page(), the return
value should be checked.
This patch has been provided:
http://www.spinics.net/lists/linux-fsdevel/msg66948.html but not been
applied now.
Signed-off-by: Younger Liu <liuyiyang@hisense.com>
Cc: Younger Liu <younger.liucn@gmail.com>
Cc: Vyacheslav Dubeyko <slava@dubeyko.com>
Reviewed-by: Prasad Joshi <prasadjoshi.linux@gmail.com>
Cc: Jörn Engel <joern@logfs.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/logfs/segment.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/logfs/segment.c b/fs/logfs/segment.c
index d448a777166b..7f9b096d8d57 100644
--- a/fs/logfs/segment.c
+++ b/fs/logfs/segment.c
@@ -62,7 +62,8 @@ static struct page *get_mapping_page(struct super_block *sb, pgoff_t index,
page = read_cache_page(mapping, index, filler, sb);
else {
page = find_or_create_page(mapping, index, GFP_NOFS);
- unlock_page(page);
+ if (page)
+ unlock_page(page);
}
return page;
}
--
GitLab