btrfs: fix an error handling path in btrfs_defrag_leaves()

[ Upstream commit db0a4a7b8e95f9312a59a67cbd5bc589f090e13d ]

All error handling paths end to 'out', except this memory allocation
failure.

This is spurious. So branch to the error handling path also in this case.
It will add a call to:

	memset(&root->defrag_progress, 0,
	       sizeof(root->defrag_progress));

Fixes: 6702ed490ca0 ("Btrfs: Add run time btree defrag, and an ioctl to force btree defrag")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index b6cf39f..072ab9a 100644 (file)
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -31,8 +31,10 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
                goto out;
 
        path = btrfs_alloc_path();
-       if (!path)
-               return -ENOMEM;
+       if (!path) {
+               ret = -ENOMEM;
+               goto out;
+       }
 
        level = btrfs_header_level(root->node);