diff --git a/fs/ksmbd/smb2misc.c b/fs/ksmbd/smb2misc.c
index 9e54ecc9d4ad..8d7368ccda85 100644
--- a/fs/ksmbd/smb2misc.c
+++ b/fs/ksmbd/smb2misc.c
@@ -399,6 +399,11 @@ int ksmbd_smb2_check_message(struct ksmbd_work *work)
 		return 1;
 	}
 
+	if (len < __SMB2_HEADER_STRUCTURE_SIZE + sizeof(__le16)) {
+		ksmbd_debug(SMB, "Message is too small for StructureSize2\n");
+		return 1;
+	}
+
 	if (smb2_req_struct_sizes[command] != pdu->StructureSize2) {
 		if (!(command == SMB2_OPLOCK_BREAK_HE &&
 		    (le16_to_cpu(pdu->StructureSize2) == OP_BREAK_STRUCT_SIZE_20 ||