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Fix deadly mdns crash

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This commit is contained in:
0xFEEDC0DE64
2023-04-05 16:13:07 +02:00
parent db0e20f446
commit 4fa3023ea2
1 changed files with 13 additions and 11 deletions
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24
components/mdns/mdns.c
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@ -1614,18 +1614,20 @@ static void _mdns_remove_scheduled_answer(mdns_if_t tcpip_if, mdns_ip_protocol_t
while (q) { while (q) {
if (q->tcpip_if == tcpip_if && q->ip_protocol == ip_protocol && q->distributed) { if (q->tcpip_if == tcpip_if && q->ip_protocol == ip_protocol && q->distributed) {
mdns_out_answer_t *a = q->answers; mdns_out_answer_t *a = q->answers;
if (a->type == type && a->service == service->service) { if (a) {
q->answers = q->answers->next; if (a->type == type && a->service == service->service) {
free(a); q->answers = q->answers->next;
} else { free(a);
while (a->next) { } else {
if (a->next->type == type && a->next->service == service->service) { while (a->next) {
mdns_out_answer_t *b = a->next; if (a->next->type == type && a->next->service == service->service) {
a->next = b->next; mdns_out_answer_t *b = a->next;
free(b); a->next = b->next;
break; free(b);
break;
}
a = a->next;
} }
a = a->next;
} }
} }
} }