[gssproxy] 02/02: Fix NULL deref in gssi_release_cred()

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simo pushed a commit to branch master
in repository gssproxy.

commit fca9a5adb76622015bb64d03b038ccdbf4525010
Author: Robbie Harwood <rharwood(a)redhat.com&gt;
Date:   Fri Sep 23 18:42:31 2016 +0000

    Fix NULL deref in gssi_release_cred()
    
    Signed-off-by: Robbie Harwood <rharwood(a)redhat.com&gt;
    Reviewed-by: Simo Sorce <simo(a)redhat.com&gt;
    Merges 32
---
 proxy/src/mechglue/gpp_creds.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/proxy/src/mechglue/gpp_creds.c b/proxy/src/mechglue/gpp_creds.c
index ff1dfda..2818dd7 100644
--- a/proxy/src/mechglue/gpp_creds.c
+++ b/proxy/src/mechglue/gpp_creds.c
@@ -529,7 +529,9 @@ OM_uint32 gssi_release_cred(OM_uint32 *minor_status,
 
     GSSI_TRACE();
 
-    if (*cred_handle == GSS_C_NO_CREDENTIAL) {
+    if (cred_handle == NULL) {
+        return GSS_S_NO_CRED | GSS_S_CALL_INACCESSIBLE_READ;
+    } else if (*cred_handle == GSS_C_NO_CREDENTIAL) {
         *minor_status = 0;
         return GSS_S_COMPLETE;
     }

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