evdns: Add additional validation for values of dns options

1 files changed, 3 insertions, 0 deletions

diff --git a/evdns.c b/evdns.c
index d820aa70..a5b31a3c 100644
--- a/evdns.c
+++ b/evdns.c
@@ -3531,6 +3531,7 @@ evdns_base_set_option_impl(struct evdns_base *base,
 		base->global_max_retransmits = retries;
 	} else if (str_matches_option(option, "randomize-case:")) {
 		int randcase = strtoint(val);
+		if (randcase == -1) return -1;
 		if (!(flags & DNS_OPTION_MISC)) return 0;
 		base->global_randomize_case = randcase;
 	} else if (str_matches_option(option, "bind-to:")) {
@@ -3554,11 +3555,13 @@ evdns_base_set_option_impl(struct evdns_base *base,
 		    sizeof(tv));
 	} else if (str_matches_option(option, "so-rcvbuf:")) {
 		int buf = strtoint(val);
+		if (buf == -1) return -1;
 		if (!(flags & DNS_OPTION_MISC)) return 0;
 		log(EVDNS_LOG_DEBUG, "Setting SO_RCVBUF to %s", val);
 		base->so_rcvbuf = buf;
 	} else if (str_matches_option(option, "so-sndbuf:")) {
 		int buf = strtoint(val);
+		if (buf == -1) return -1;
 		if (!(flags & DNS_OPTION_MISC)) return 0;
 		log(EVDNS_LOG_DEBUG, "Setting SO_SNDBUF to %s", val);
 		base->so_sndbuf = buf;