--- busybox-1.18.2/networking/ping.c
+++ busybox-1.18.2-ping/networking/ping.c
@@ -394,7 +394,7 @@ static void sendping4(int junk UNUSED_PA
 #if ENABLE_PING6
 static void sendping6(int junk UNUSED_PARAM)
 {
-	struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr) + 4);
+	struct icmp6_hdr *pkt = G.snd_packet;
 
 	//memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4);
 	pkt->icmp6_type = ICMP6_ECHO_REQUEST;