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mdns: Fix potential null deref reported by fuzzer test

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This commit is contained in:
David Cermak
2021-12-07 16:17:53 +01:00
committed by David Čermák
parent 33f7009bef
commit c0e105cc41
1 changed files with 2 additions and 1 deletions
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3
components/mdns/mdns.c
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@ -2821,7 +2821,8 @@ static bool _mdns_question_matches(mdns_parsed_question_t * question, uint16_t t
if (type == MDNS_TYPE_A || type == MDNS_TYPE_AAAA) {
return true;
} else if (type == MDNS_TYPE_PTR || type == MDNS_TYPE_SDPTR) {
if (!strcasecmp(service->service->service, question->service)
if (question->service && question->proto && question->domain
&& !strcasecmp(service->service->service, question->service)
&& !strcasecmp(service->service->proto, question->proto)
&& !strcasecmp(MDNS_DEFAULT_DOMAIN, question->domain)) {
return true;