diff options
Diffstat (limited to 'tools/hv/hv_kvp_daemon.c')
| -rw-r--r-- | tools/hv/hv_kvp_daemon.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c index 3965186b375a..1b917eaffad8 100644 --- a/tools/hv/hv_kvp_daemon.c +++ b/tools/hv/hv_kvp_daemon.c @@ -867,7 +867,7 @@ kvp_get_ip_info(int family, char *if_name, int op, int sn_offset = 0; int error = 0; char *buffer; - struct hv_kvp_ipaddr_value *ip_buffer; + struct hv_kvp_ipaddr_value *ip_buffer = NULL; char cidr_mask[5]; /* /xyz */ int weight; int i; @@ -1172,6 +1172,7 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val) FILE *file; char cmd[PATH_MAX]; char *mac_addr; + int str_len; /* * Set the configuration for the specified interface with @@ -1295,8 +1296,18 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val) * invoke the external script to do its magic. */ - snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s", - "hv_set_ifconfig", if_file); + str_len = snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s", + "hv_set_ifconfig", if_file); + /* + * This is a little overcautious, but it's necessary to suppress some + * false warnings from gcc 8.0.1. + */ + if (str_len <= 0 || (unsigned int)str_len >= sizeof(cmd)) { + syslog(LOG_ERR, "Cmd '%s' (len=%d) may be too long", + cmd, str_len); + return HV_E_FAIL; + } + if (system(cmd)) { syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s", cmd, errno, strerror(errno)); @@ -1369,6 +1380,8 @@ int main(int argc, char *argv[]) daemonize = 0; break; case 'h': + print_usage(argv); + exit(0); default: print_usage(argv); exit(EXIT_FAILURE); |