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evdns fix NULL res clearing the cache entry

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Signed-off-by: Kirill Rodriguez <theoden8@tutamail.com>
Signed-off-by: Kirill Rodriguez <theoden8@gmail.com>
This commit is contained in:
Greg Hazel 2022-03-31 15:29:32 -07:00 committed by Kirill Rodriguez
parent 8572c273e9
commit 822502d72d
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1 changed files with 11 additions and 9 deletions
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20
evdns.c
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@ -5383,15 +5383,17 @@ evdns_cache_write(struct evdns_base *dns_base, char *nodename, struct evutil_add
log(EVDNS_LOG_DEBUG, "Ejecting old cache for %s", nodename);
evdns_cache_free(cache);
}
cache = mm_calloc(1, sizeof(struct evdns_cache));
cache->base = dns_base;
cache->name = mm_strdup(nodename);
cache->ai = evutil_dup_addrinfo_(res);
SPLAY_INSERT(evdns_tree, &cache->base->cache_root, cache);
evtimer_assign(&cache->ev_timeout, dns_base->event_base, evdns_ttl_expired, cache);
timerclear(&tv);
tv.tv_sec = ttl;
evtimer_add(&cache->ev_timeout, &tv);
if (res) {
cache = mm_calloc(1, sizeof(struct evdns_cache));
cache->base = dns_base;
cache->name = mm_strdup(nodename);
cache->ai = evutil_dup_addrinfo_(res);
SPLAY_INSERT(evdns_tree, &cache->base->cache_root, cache);
evtimer_assign(&cache->ev_timeout, dns_base->event_base, evdns_ttl_expired, cache);
timerclear(&tv);
tv.tv_sec = ttl;
evtimer_add(&cache->ev_timeout, &tv);
}
EVDNS_UNLOCK(dns_base);
}