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nemtap: lb app: Validate ihl field when hashing packet

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MFC after:	1 week
This commit is contained in:
Vincenzo Maffione 2021-09-26 13:44:51 +00:00
parent 8771ff7538
commit f7cef43aa9
1 changed files with 3 additions and 1 deletions
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4
tools/tools/netmap/pkt_hash.c
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@ -150,7 +150,9 @@ decode_ip_n_hash(const struct ip *iph, uint8_t hash_split, uint8_t seed)
{
uint32_t rc = 0;
if (hash_split == 2) {
if (iph->ip_hl < 5 || iph->ip_hl * 4 > iph->ip_len) {
rc = 0;
} else if (hash_split == 2) {
rc = sym_hash_fn(ntohl(iph->ip_src.s_addr),
ntohl(iph->ip_dst.s_addr),
ntohs(0xFFFD) + seed,