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dhc6_lease_destroy() and dhc6_ia_destroy() now set lease and IA

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pointers to NULL after freeing, to prevent subsequent accesses to freed
memory.  [rt17352]
This commit is contained in:
Evan Hunt
2007-12-08 19:36:00 +00:00
parent 76db44f9d6
commit e32529a528
4 changed files with 56 additions and 38 deletions
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10
client/clparse.c
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@@ -1398,7 +1398,7 @@ parse_client6_lease_statement(struct parse *cfile)
if (!has_ia) {
log_debug("Lease with no IA's discarded from lease db.");
dhc6_lease_destroy(lease, MDL);
dhc6_lease_destroy(&lease, MDL);
return;
}
@@ -1415,7 +1415,7 @@ parse_client6_lease_statement(struct parse *cfile)
if (client == NULL) {
parse_warn(cfile, "No matching client state.");
dhc6_lease_destroy(lease, MDL);
dhc6_lease_destroy(&lease, MDL);
return;
}
@@ -1429,7 +1429,7 @@ parse_client6_lease_statement(struct parse *cfile)
log_error("Invalid length of DHCPv6 Preference option "
"(%d != 1)", ds.len);
data_string_forget(&ds, MDL);
dhc6_lease_destroy(lease, MDL);
dhc6_lease_destroy(&lease, MDL);
return;
} else
lease->pref = ds.data[0];
@@ -1446,12 +1446,12 @@ parse_client6_lease_statement(struct parse *cfile)
(lease->server_id.len == 0)) {
/* This should be impossible... */
log_error("Invalid SERVERID option cache.");
dhc6_lease_destroy(lease, MDL);
dhc6_lease_destroy(&lease, MDL);
return;
}
if (client->active_lease != NULL)
dhc6_lease_destroy(client->active_lease, MDL);
dhc6_lease_destroy(&client->active_lease, MDL);
client->active_lease = lease;
#endif /* defined(DHCPv6) */