Patch to keep save_old_password() thread-safe when called by the PAM
module, since nothing blocks other threads from calling getpwnam in
parallel

Authors: Steve Langasek <steve.langasek@canonical.com>

Upstream status: to be submitted

Index: pam.deb/modules/pam_unix/passverify.c
===================================================================
--- pam.deb.orig/modules/pam_unix/passverify.c
+++ pam.deb/modules/pam_unix/passverify.c
@@ -653,7 +653,7 @@
     fclose(opwfile);
 
     if (!found) {
-	pwd = getpwnam(forwho);
+	pwd = pam_modutil_getpwnam(pamh, forwho);
 	if (pwd == NULL) {
 	    err = 1;
 	} else {