btrfs-progs: mkfs/rootdir: Fix memory leak in traverse_directory()

The bug is exposed by mkfs test case 009, with D=asan.

We are leaking memory of parent_dir_entry->path() which ,except the
rootdir, is allocated by strdup().

Before fixing it, unifiy the allocation of parent_dir_entry() to heap
allocation.

Then fix it by adding "free(parent_dir_entry->path);" in
traverse_directory() and error handler.

Issue: #92
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/mkfs/rootdir.h b/mkfs/rootdir.h
index d0fc2eb5..f06c7dd1 100644
--- a/mkfs/rootdir.h
+++ b/mkfs/rootdir.h
@@ -23,7 +23,7 @@
 
 struct directory_name_entry {
 	const char *dir_name;
-	const char *path;
+	char *path;
 	ino_t inum;
 	struct list_head list;
 };