diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index dc49e41e1a14..41d60c214a07 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -9085,8 +9085,6 @@ static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
 	int ret = 0;
 
 	*out_count = 0;
-	if (in_count == 0)
-		return -EINVAL;
 
 	start = le64_to_cpu(qar_req->file_offset);
 	length = le64_to_cpu(qar_req->length);
@@ -9098,8 +9096,18 @@ static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
 	if (!fp)
 		return -ENOENT;
 
-	ret = ksmbd_vfs_fqar_lseek(fp, start, length,
-				   qar_rsp, in_count, out_count);
+	if (!in_count) {
+		struct file_allocated_range_buffer range;
+
+		ret = ksmbd_vfs_fqar_lseek(fp, start, length, &range, 1,
+					   out_count);
+		if (!ret && *out_count)
+			ret = -ENOSPC;
+		*out_count = 0;
+	} else {
+		ret = ksmbd_vfs_fqar_lseek(fp, start, length,
+					   qar_rsp, in_count, out_count);
+	}
 	if (ret && ret != -E2BIG)
 		*out_count = 0;