From: Filipe David Borba Manana <fdmanana@gmail.com>
Date: Wed, 11 Sep 2013 19:36:44 +0000 (+0100)
Subject: Btrfs: don't leak transaction in btrfs_sync_file()
X-Git-Tag: v3.12-rc2~5^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a0634be562c27ddee7c94bce4f765f8071244e07;p=profile%2Fivi%2Fkernel-x86-ivi.git

Btrfs: don't leak transaction in btrfs_sync_file()

In btrfs_sync_file(), if the call to btrfs_log_dentry_safe() returns
a negative error (for e.g. -ENOMEM via btrfs_log_inode()), we would
return without ending/freeing the transaction.

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
---

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 5ba87b0..d12107e 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1859,8 +1859,8 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 
 	ret = btrfs_log_dentry_safe(trans, root, dentry);
 	if (ret < 0) {
-		mutex_unlock(&inode->i_mutex);
-		goto out;
+		/* Fallthrough and commit/free transaction. */
+		ret = 1;
 	}
 
 	/* we've logged all the items and now have a consistent