Otherwise, it's filled with stack garbage, which might result in
getaddrinfo returning -1 for invalid hints. Since this influences the
delivery of mail or not, this remotely reveals something having to do
with bytes off the stack. Bad news bears.
Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
---
smtpd/filters/filter_dnsbl.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/smtpd/filters/filter_dnsbl.c b/smtpd/filters/filter_dnsbl.c
index 7e6ce06..0e1ec6b 100644
--- a/smtpd/filters/filter_dnsbl.c
+++ b/smtpd/filters/filter_dnsbl.c
@@ -83,6 +83,7 @@ dnsbl_on_connect(uint64_t id, struct filter_connect *conn)
}
*q = id;
+ memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
aq = getaddrinfo_async(buf, NULL, &hints, NULL);
--
1.9.3
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