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diff --git a/src/kdc/do_tgs_req.c b/src/kdc/do_tgs_req.c
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index 298e132..12180ff 100644
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--- a/src/kdc/do_tgs_req.c
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+++ b/src/kdc/do_tgs_req.c
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@@ -1158,7 +1158,7 @@ prep_reprocess_req(krb5_kdc_req *request, krb5_principal *krbtgt_princ)
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             free(temp_buf);
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             if (retval) {
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                 /* no match found */
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-                kdc_err(kdc_context, retval, 0);
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+                kdc_err(kdc_context, retval, "unable to find realm of host");
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                 goto cleanup;
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             }
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             if (realms == 0) {
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diff --git a/src/lib/kadm5/logger.c b/src/lib/kadm5/logger.c
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index efff818..ef3735a 100644
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--- a/src/lib/kadm5/logger.c
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+++ b/src/lib/kadm5/logger.c
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@@ -188,6 +188,9 @@ klog_com_err_proc(const char *whoami, long int code, const char *format, va_list
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     char	*cp;
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     char	*syslogp;
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+    if (whoami == NULL || format == NULL)
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+        return;
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+
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     /* Make the header */
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     snprintf(outbuf, sizeof(outbuf), "%s: ", whoami);
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     /*