diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 3dddd20c5e2bd17aff56d4cac1fb12d830c86bcc..cfe9b800ea8c2e45ec5eff688a4da5ee181f694f 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -3419,7 +3419,7 @@ static int smb3_fiemap(struct cifs_tcon *tcon,
 	if (rc)
 		goto out;
 
-	if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
+	if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
 		rc = -EINVAL;
 		goto out;
 	}