[11436] in Kerberos-V5-bugs
[krbdev.mit.edu #6675] segfault in gss_export_sec_context
daemon@ATHENA.MIT.EDU (Arlene Berry" via RT)
Fri Mar 5 00:41:39 2010
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From: ""Arlene Berry" via RT" <rt-comment@krbdev.MIT.EDU>
In-Reply-To: <rt-6675@krbdev.mit.edu>
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To: "'AdminCc of krbdev.mit.edu Ticket #6675'":;"'AdminCc of krbdev.mit.edu Ticket #6675'":;@MIT.EDU
Date: Fri, 5 Mar 2010 00:41:23 -0500 (EST)
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When using gss_export_sec_context on a security context that was created
using impersonated credentials, gss_export_sec_context segfaults. The
problem is that it assumes that if ctx->initiator exists then
ctx->initiator->ad_context exists which doesn't appear to be the case
when impersonated credentials were used. The following changes fixed it
for us.
--- krb5/src/lib/gssapi/krb5/ser_sctx.c (revision 41102)
+++ krb5/src/lib/gssapi/krb5/ser_sctx.c (working copy)
@@ -357,7 +357,7 @@
initiator_name = ctx->initiate ? ctx->here : ctx->there;
- if (initiator_name) {
+ if (initiator_name && initiator_name->ad_context) {
kret = krb5_size_opaque(kcontext,
KV5M_AUTHDATA_CONTEXT,
initiator_name->ad_context,
@@ -534,7 +534,7 @@
initiator_name = ctx->initiate ? ctx->here :
ctx->there;
- if (initiator_name) {
+ if (initiator_name && initiator_name->ad_context) {
kret = krb5_externalize_opaque(kcontext,
KV5M_AUTHDATA_CONTEXT,
initiator_name->ad_context,
@@ -767,6 +767,8 @@
(krb5_pointer
*)&initiator_name->ad_context,
&bp,
&remain);
+ if (kret == EINVAL)
+ kret = 0;
}
}
/* Get trailer */
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