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net: dns: Check parsing error properly for response

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If the packet parsing fails in dns_unpack_response_query(), then
do not continue further but bail out early.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
This commit is contained in:
Jukka Rissanen 2024-11-26 15:40:53 +02:00 • committed by Benjamin Cabé
commit eb2550a441
1 changed files with 5 additions and 0 deletions
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5
subsys/net/lib/dns/resolve.c
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@ -789,6 +789,11 @@ int dns_validate_msg(struct dns_resolve_context *ctx,
ret = dns_unpack_response_query(dns_msg);
if (ret < 0) {
if (ret == -ENOMEM) {
ret = DNS_EAI_FAIL;
goto quit;
}
/* Check mDNS like above */
if (*dns_id > 0) {
ret = DNS_EAI_FAIL;