Eliminate potential ap_server_root_relative segfaults, with the input

of Jeff Trawick's style changes to the first patches.  Doesn't include
  the fixes to ssl [more complex], and we won't trap errors that involve
  ap_serverroot, since we presume that was normalized on the way in.
  Therefore, testing ap_server_root_relative(DEFAULT_FOO) cases
  should never become necessary.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93965 13f79535-47bb-0310-9956-ffa450edef68

modules/generators/mod_cgi.c

@@ -165,6 +165,12 @@ static const char *set_scriptlog(cmd_parms *cmd, void *dummy, const char *arg)
                                                  &cgi_module);
 
     conf->logname = ap_server_root_relative(cmd->pool, arg);
+
+    if (!conf->logname) {
+        return apr_pstrcat(cmd->pool, "Invalid ScriptLog path ",
+                           arg, NULL);
+    }
+
     return NULL;
 }