diff options
| -rw-r--r-- | lib/libutil/realhostname.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/lib/libutil/realhostname.c b/lib/libutil/realhostname.c index 7236890dab0b..2c9c5c52a902 100644 --- a/lib/libutil/realhostname.c +++ b/lib/libutil/realhostname.c @@ -122,8 +122,10 @@ realhostname_sa(char *host, size_t hsize, struct sockaddr *addr, int addrlen) port = ((struct sockinet *)addr)->si_port; ((struct sockinet *)addr)->si_port = 0; if (!memcmp(sa, addr, sa->sa_len)) { - strncpy(host, res->ai_canonname, - hsize); + if (res->ai_canonname != 0) + strncpy(host, + res->ai_canonname, + hsize); result = HOSTNAME_FOUND; ((struct sockinet *)addr)->si_port = port; @@ -146,8 +148,10 @@ realhostname_sa(char *host, size_t hsize, struct sockaddr *addr, int addrlen) if (IN6_IS_ADDR_V4MAPPED(in6) && !memcmp(&in6->s6_addr[12], in, sizeof(*in))) { - strncpy(host, res->ai_canonname, - hsize); + if (res->ai_canonname != 0) + strncpy(host, + res->ai_canonname, + hsize); result = HOSTNAME_FOUND; break; } |