From: Tyler Hicks <tyhicks@canonical.com>
Date: Tue, 4 Jun 2013 17:24:56 +0000 (-0700)
Subject: eCryptfs: Check return of filemap_write_and_wait during fsync
X-Git-Tag: v3.9.6~29
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4dbfc6cccf119acb59d9cf8853a78890c81e21c5;p=thirdparty%2Fkernel%2Fstable.git

eCryptfs: Check return of filemap_write_and_wait during fsync

commit bc5abcf7e411b889f73ea2a90439071a0f451011 upstream.

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

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Cc: Paul Taysom <taysom@chromium.org>
Cc: Olof Johansson <olofj@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index a19022fe130f0..3d7fb593f08e6 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -294,7 +294,12 @@ 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);
 }