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net: icmpv4: Drop ICMPv4 packet if ICMP header is NULL #6170

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Merged
merged 1 commit into from
Feb 13, 2018
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net: icmpv4: Drop ICMPv4 packet if ICMP header is NULL #6170

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4 changes: 4 additions & 0 deletions subsys/net/ip/ipv4.c
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Original file line number Diff line number Diff line change
Expand Up @@ -142,6 +142,10 @@ static inline enum net_verdict process_icmpv4_pkt(struct net_pkt *pkt,
struct net_icmp_hdr hdr, *icmp_hdr;

icmp_hdr = net_icmpv4_get_hdr(pkt, &hdr);
if (!icmp_hdr) {
NET_DBG("NULL ICMPv4 header - dropping");
return NET_DROP;
}

NET_DBG("ICMPv4 packet received type %d code %d",
icmp_hdr->type, icmp_hdr->code);
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