[095/141] eCryptfs: Check return of filemap_write_and_wait during fsync

[Steven Rostedt]

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

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

From: Tyler Hicks <tyhicks@xxxxxxxxxxxxx>

[ Upstream commit bc5abcf7e411b889f73ea2a90439071a0f451011 ]

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

Signed-off-by: Tyler Hicks <tyhicks@xxxxxxxxxxxxx>
Cc: Paul Taysom <taysom@xxxxxxxxxxxx>
Cc: Olof Johansson <olofj@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v3.6+
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 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);
 }
 
-- 
1.7.10.4


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