From c94eeff676ed6add94550e13d0539c17a74e988b Mon Sep 17 00:00:00 2001
From: Nalin Dahyabhai <nalin@fedoraproject.org>
Date: Mar 03 2010 16:09:49 +0000
Subject: - fix a null pointer dereference and crash introduced in our PAM patch that

    would happen if ftpd was given the name of a user who wasn't known to
    the local system, limited to being triggerable by gssapi-authenticated
    clients by the default xinetd config (Olivier Fourdan, #569472)

---

diff --git a/krb5-1.7-pam.patch b/krb5-1.7-pam.patch
index 6e5a6f7..33331da 100644
--- a/krb5-1.7-pam.patch
+++ b/krb5-1.7-pam.patch
@@ -937,7 +937,7 @@ diff -up krb5-1.7/src/appl/gssftp/ftpd/ftpd.c krb5-1.7/src/appl/gssftp/ftpd/ftpd
 +#ifdef USE_PAM
 +		if (appl_pam_enabled(kcontext, "ftpd")) {
 +			if (appl_pam_acct_mgmt(FTP_PAM_SERVICE, 0,
-+					       pw->pw_name, "",
++					       name, "",
 +					       hostname,
 +					       NULL,
 +					       FTP_PAM_SERVICE) != 0) {
@@ -971,7 +971,7 @@ diff -up krb5-1.7/src/appl/gssftp/ftpd/ftpd.c krb5-1.7/src/appl/gssftp/ftpd/ftpd
 -		if (pw == NULL || (!kpass(pw->pw_name, passwd) &&
 -				   (want_creds || !*pw->pw_passwd ||
 -				    strcmp(xpasswd, pw->pw_passwd)))) {
-+		if ((pw == NULL) ||
++		if ((pw == NULL) || (
 +#ifdef USE_PAM
 +		    appl_pam_enabled(kcontext, "ftpd") ?
 +		    (appl_pam_authenticate(FTP_PAM_SERVICE, 0,
@@ -983,7 +983,7 @@ diff -up krb5-1.7/src/appl/gssftp/ftpd/ftpd.c krb5-1.7/src/appl/gssftp/ftpd/ftpd
 +		    (!kpass(pw->pw_name, passwd) &&
 +		     (want_creds ||
 +		      !*pw->pw_passwd ||
-+		      strcmp(xpasswd, pw->pw_passwd)))) {
++		      strcmp(xpasswd, pw->pw_passwd))))) {
  			pw = NULL;
  			sleep(5);
  			if (++login_attempts >= 3) {
diff --git a/krb5.spec b/krb5.spec
index c716555..e0c3994 100644
--- a/krb5.spec
+++ b/krb5.spec
@@ -10,7 +10,7 @@
 Summary: The Kerberos network authentication system
 Name: krb5
 Version: 1.7.1
-Release: 3%{?dist}
+Release: 4%{?dist}
 # Maybe we should explode from the now-available-to-everybody tarball instead?
 # http://web.mit.edu/kerberos/dist/krb5/1.7/krb5-1.7.1-signed.tar
 Source0: krb5-%{version}.tar.gz
@@ -223,6 +223,12 @@ to obtain initial credentials from a KDC using a private key and a
 certificate.
 
 %changelog
+* Wed Mar  3 2010 Nalin Dahyabhai <nalin@redhat.com> - 1.7.1-4
+- fix a null pointer dereference and crash introduced in our PAM patch that
+  would happen if ftpd was given the name of a user who wasn't known to the
+  local system, limited to being triggerable by gssapi-authenticated clients by
+  the default xinetd config (Olivier Fourdan, #569472)
+
 * Tue Mar  2 2010 Nalin Dahyabhai <nalin@redhat.com> - 1.7.1-3
 - fix a regression (not labeling a kdb database lock file correctly, #569902)