[PATCH 49/84] eCryptfs: Check return of filemap_write_and_wait during fsync

[Kamal Mostafa]

3.8.13.3 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tyler Hicks <tyhicks at canonical.com>

commit bc5abcf7e411b889f73ea2a90439071a0f451011 upstream.

Error out of ecryptfs_fsync() if filemap_write_and_wait() fails.

Signed-off-by: Tyler Hicks <tyhicks at canonical.com>
Cc: Paul Taysom <taysom at chromium.org>
Cc: Olof Johansson <olofj at chromium.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 fs/ecryptfs/file.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 4f9a25e..9d5dd5c 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -296,7 +296,12 @@ static int ecryptfs_release(struct inode *inode, struct file *file)
 static int
 ecryptfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
-	filemap_write_and_wait(file->f_mapping);
+	int rc;
+
+	rc = filemap_write_and_wait(file->f_mapping);
+	if (rc)
+		return rc;
+
 	return vfs_fsync(ecryptfs_file_to_lower(file), datasync);
 }
 
-- 
1.8.1.2