diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 495decfc4b34849bf3b401cbcc07036de5eaaa63..66edef12c6f2516f765353646f93ef8aae629831 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -549,6 +549,10 @@ int ceph_fill_file_size(struct inode *inode, int issued,
 	if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
 	    (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
 		dout("size %lld -> %llu\n", inode->i_size, size);
+		if (size > 0 && S_ISDIR(inode->i_mode)) {
+			pr_err("fill_file_size non-zero size for directory\n");
+			size = 0;
+		}
 		i_size_write(inode, size);
 		inode->i_blocks = (size + (1<<9) - 1) >> 9;
 		ci->i_reported_size = size;