1 files changed, 4 insertions, 1 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index f1fbf903bf9b..a44ca6a4feff 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -843,7 +843,10 @@ static noinline int cow_file_range(struct inode *inode,
         struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
         int ret = 0;
 
-        BUG_ON(btrfs_is_free_space_inode(inode));
+        if (btrfs_is_free_space_inode(inode)) {
+                WARN_ON_ONCE(1);
+                return -EINVAL;
+        }
 
         num_bytes = ALIGN(end - start + 1, blocksize);
         num_bytes = max(blocksize,  num_bytes);