Adding upstream version 3.7.11.upstream/3.7.11upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/src/smtp/smtp_addr.c b/src/smtp/smtp_addr.c
index 2b5c126..fa0af4e 100644
--- a/src/smtp/smtp_addr.c
+++ b/src/smtp/smtp_addr.c
@@ -154,7 +154,7 @@ static DNS_RR *smtp_addr_one(DNS_RR *addr_list, const char *host, int res_opt,
 		msg_fatal("host %s: conversion error for address family "
 			  "%d: %m", host, res0->ai_addr->sa_family);
 	    addr_list = dns_rr_append(addr_list, addr);
-	    if (msg_verbose)
+	    if (msg_verbose && !DNS_RR_IS_TRUNCATED(addr_list))
 		msg_info("%s: using numerical host %s", myname, host);
 	    freeaddrinfo(res0);
 	    return (addr_list);
@@ -232,6 +232,8 @@ static DNS_RR *smtp_addr_one(DNS_RR *addr_list, const char *host, int res_opt,
 		    msg_fatal("host %s: conversion error for address family "
 			      "%d: %m", host, res0->ai_addr->sa_family);
 		addr_list = dns_rr_append(addr_list, addr);
+		if (DNS_RR_IS_TRUNCATED(addr_list))
+		    break;
 		if (msg_verbose) {
 		    MAI_HOSTADDR_STR hostaddr_str;
 
@@ -297,6 +299,8 @@ static DNS_RR *smtp_addr_list(DNS_RR *mx_names, DSN_BUF *why)
 	    msg_panic("smtp_addr_list: bad resource type: %d", rr->type);
 	addr_list = smtp_addr_one(addr_list, (char *) rr->data, res_opt,
 				  rr->pref, why);
+	if (addr_list && DNS_RR_IS_TRUNCATED(addr_list))
+	    break;
     }
     return (addr_list);
 }
@@ -391,6 +395,13 @@ static DNS_RR *smtp_balance_inet_proto(DNS_RR *addr_list, int misc_flags,
      */
 
     /*
+     * Ensure that dns_rr_append() won't interfere with the protocol
+     * balancing goals.
+     */
+    if (addr_limit > var_dns_rr_list_limit)
+	addr_limit = var_dns_rr_list_limit;
+
+    /*
      * Count the number of IPv6 and IPv4 addresses.
      */
     for (v4_count = v6_count = 0, rr = addr_list; rr != 0; rr = rr->next) {