From: Chao Yu <chao2.yu@samsung.com>
Date: Sat, 29 Mar 2014 07:30:40 +0000 (+0800)
Subject: f2fs: fix error path when fail to read inline data
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d54c795b495b9bd417e482286c832c9a8eb210ae;p=linux-beck.git

f2fs: fix error path when fail to read inline data

We should unlock page in ->readpage() path and also should unlock & release page
in error path of ->write_begin() to avoid deadlock or memory leak.
So let's add release code to fix the problem when we fail to read inline data.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
---

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 598bfa617a7e..45abd60e2bff 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -942,13 +942,19 @@ inline_data:
 	if (dn.data_blkaddr == NEW_ADDR) {
 		zero_user_segment(page, 0, PAGE_CACHE_SIZE);
 	} else {
-		if (f2fs_has_inline_data(inode))
+		if (f2fs_has_inline_data(inode)) {
 			err = f2fs_read_inline_data(inode, page);
-		else
+			if (err) {
+				page_cache_release(page);
+				return err;
+			}
+		} else {
 			err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr,
 							READ_SYNC);
-		if (err)
-			return err;
+			if (err)
+				return err;
+		}
+
 		lock_page(page);
 		if (unlikely(!PageUptodate(page))) {
 			f2fs_put_page(page, 1);
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 31ee5b164ff9..383db1fabcf4 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -45,8 +45,10 @@ int f2fs_read_inline_data(struct inode *inode, struct page *page)
 	}
 
 	ipage = get_node_page(sbi, inode->i_ino);
-	if (IS_ERR(ipage))
+	if (IS_ERR(ipage)) {
+		unlock_page(page);
 		return PTR_ERR(ipage);
+	}
 
 	zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);