From: Kevin Coffman <kwc@citi.umich.edu>
Date: Mon, 23 Oct 2006 16:10:37 +0000 (+0000)
Subject: Avoid segfault in krb5_do_preauth_tryagain
X-Git-Tag: krb5-1.6-alpha1~28
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=76ffa3584871b4bd81215daaa6ccca72ab177bf6;p=krb5.git

Avoid segfault in krb5_do_preauth_tryagain

Check pointer is non-null before using it.  Avoids segfault in
krb5_do_preauth_tryagain().

ticket: new

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@18734 dc483132-0cff-0310-8789-dd5450dbe970
---

diff --git a/src/lib/krb5/krb/preauth2.c b/src/lib/krb5/krb/preauth2.c
index eb1806d1b..ce2bf6883 100644
--- a/src/lib/krb5/krb/preauth2.c
+++ b/src/lib/krb5/krb/preauth2.c
@@ -1239,7 +1239,7 @@ krb5_do_preauth_tryagain(krb5_context kcontext,
        return KRB_ERR_GENERIC;
     }
 
-    for (i = 0; padata[i]->pa_type != 0; i++) {
+    for (i = 0; padata[i] != NULL && padata[i]->pa_type != 0; i++) {
 	out_padata = NULL;
 	for (j = 0; j < context->n_modules; j++) {
 	    module = &context->modules[j];