linux-kernel - [PATCH] hfsplus: hfsplus_file_fsync() does not check for return value of sync_inode

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Message-Id: <1427124798-17530-1-git-send-email-changwoo.m@gmail.com>
Date:	Mon, 23 Mar 2015 11:33:18 -0400
From:	Changwoo Min <changwoo.m@...il.com>
To:	viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	taesoo@...ech.edu, changwoo@...ech.edu, sanidhya@...ech.edu,
	blee@...ech.edu, Changwoo Min <changwoo.m@...il.com>
Subject: [PATCH] hfsplus: hfsplus_file_fsync() does not check for return value of sync_inode_metadata()

hfsplus_file_fsync() siliently ignores the return value of sync_inode_metadata(). 
If an error occurs at sync_inode_metadata() and subsequent updates of other file
system metadata (b-trees) succeed, file system metadata will be inconsistent. 

Signed-off-by: Changwoo Min <changwoo.m@...il.com>
---
 fs/hfsplus/inode.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 0cf786f..9444719 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -286,7 +286,11 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 	/*
 	 * Sync inode metadata into the catalog and extent trees.
 	 */
-	sync_inode_metadata(inode, 1);
+	error = sync_inode_metadata(inode, 1);
+	if (error) {
+		mutex_unlock(&inode->i_mutex);
+		return error;
+	}
 
 	/*
 	 * And explicitly write out the btrees.
-- 
1.9.1

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