net: dns: Check parsing error properly for response

If the packet parsing fails in dns_unpack_response_query(), then do not continue further but bail out early. Signed-off-by: Jukka Rissanen <[email protected]>
zephyrproject-rtos · Nov 28, 2024 · eb2550a · eb2550a
1 parent 3c59bd4
commit eb2550a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/subsys/net/lib/dns/resolve.c b/subsys/net/lib/dns/resolve.c
@@ -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;