diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index bcd8142..86b3e2f 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -3808,8 +3808,8 @@
 		if (unlikely(req->tp_block_size & (PAGE_SIZE - 1)))
 			goto out;
 		if (po->tp_version >= TPACKET_V3 &&
-		    (int)(req->tp_block_size -
-			  BLK_PLUS_PRIV(req_u->req3.tp_sizeof_priv)) <= 0)
+		    req->tp_block_size <=
+			  BLK_PLUS_PRIV((u64)req_u->req3.tp_sizeof_priv))
 			goto out;
 		if (unlikely(req->tp_frame_size < po->tp_hdrlen +
 					po->tp_reserve))