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Merge branch 'bugfix/mdns_null_deref_fuzzer_v4.2' into 'release/v4.2'

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mdns: Fix potential null deref reported by fuzzer test(v4.2)

See merge request espressif/esp-idf!17145
This commit is contained in:
Zim Kalinowski 2022-02-15 03:37:55 +00:00
commit 6f2d77ed2c
1 changed files with 2 additions and 1 deletions
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3
components/mdns/mdns.c
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@ -2439,7 +2439,8 @@ 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;