--- Linux-PAM-0.99.8.1/modules/pam_xauth/pam_xauth.c.bak	2006-01-22 17:40:58.000000000 +0200
+++ Linux-PAM-0.99.8.1/modules/pam_xauth/pam_xauth.c	2007-08-25 21:57:02.392985706 +0300
@@ -113,6 +113,8 @@ run_coprocess(const char *input, char **
 		size_t j;
 		char *args[10];
 		const char *tmp;
+		long nropen;
+
 		/* Drop privileges. */
 		setgid(gid);
 		setgroups(0, NULL);
@@ -124,7 +126,8 @@ run_coprocess(const char *input, char **
 		 * descriptors. */
 		dup2(ipipe[0], STDIN_FILENO);
 		dup2(opipe[1], STDOUT_FILENO);
-		for (i = 0; i < sysconf(_SC_OPEN_MAX); i++) {
+		nropen = sysconf(_SC_OPEN_MAX);
+		for (i = 0; i < nropen; i++) {
 			if ((i != STDIN_FILENO) && (i != STDOUT_FILENO)) {
 				close(i);
 			}