diff options
| -rw-r--r-- | fetchmail.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fetchmail.c b/fetchmail.c index ceccfacf..ae6649ef 100644 --- a/fetchmail.c +++ b/fetchmail.c @@ -1094,7 +1094,19 @@ static int load_params(int argc, char **argv, int optind) * to minimize DNS round trips. */ if (ctl->server.lead_server) - ctl->server.truename = xstrdup(ctl->server.lead_server->truename); + { + char *leadname = ctl->server.lead_server->truename; + + /* prevent core dump from ill-formed or duplicate entry */ + if (!leadname) + { + report(stderr, + _("Lead server has no name.")); + exit(PS_SYNTAX); + } + + ctl->server.truename = xstrdup(leadname); + } #ifdef HAVE_GETHOSTBYNAME else if (ctl->server.preauthenticate==A_KERBEROS_V4 || ctl->server.preauthenticate==A_KERBEROS_V5 || |