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heimdal: Resolve hdb_free_entry() SIGSEGV/SIGILL

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When the client sends kadmind a create principal (kadm_create) request
kadm_s_create_principal() returns an error before zeroing out ent (an
hdb entry structure wrapper -- hdb_entry_ex), resulting in a NULL
reference.

Fix obtained from upstream commit 35ea4955a.

PR:		268059
Reported by:	Robert Morris <rtm@lcs.mit.edu>
Obtained from:	Heimdal commit 35ea4955a
MFC after:	3 days
This commit is contained in:
Cy Schubert 2023-02-07 07:46:59 -08:00
parent 0dfaefa975
commit 6a70e0b4cd
1 changed files with 1 additions and 1 deletions
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2
crypto/heimdal/lib/kadm5/create_s.c
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@ -65,6 +65,7 @@ create_principal(kadm5_server_context *context,
kadm5_principal_ent_rec defrec, *defent;
uint32_t def_mask;
memset(ent, 0, sizeof(*ent));
if((mask & required_mask) != required_mask)
return KADM5_BAD_MASK;
if((mask & forbidden_mask))
@ -72,7 +73,6 @@ create_principal(kadm5_server_context *context,
if((mask & KADM5_POLICY) && strcmp(princ->policy, "default"))
/* XXX no real policies for now */
return KADM5_UNK_POLICY;
memset(ent, 0, sizeof(*ent));
ret = krb5_copy_principal(context->context, princ->principal,
&ent->entry.principal);
if(ret)