From f99b6fce390b594bad336bdbd61b8ca5024c38f6 Mon Sep 17 00:00:00 2001 From: Jakub Hrozek Date: Wed, 20 Sep 2017 22:26:20 +0200 Subject: [PATCH] GPO: Don't use freed LDAPURLDesc if domain for AD DC cannot be found If a referral returned during AD GPO processing cannot be assigned to a known domain, at the moment SSSD accesses memory that was freed previously with ldap_free_urldesc(). This patch moves the ldap_free_urldesc() call to both the error handler and the success branch after we are done working with the LDAPURLDesc instance. --- src/providers/ad/ad_gpo.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/providers/ad/ad_gpo.c b/src/providers/ad/ad_gpo.c index 2ee284bdc..a5237f6fa 100644 --- a/src/providers/ad/ad_gpo.c +++ b/src/providers/ad/ad_gpo.c @@ -4354,7 +4354,7 @@ ad_gpo_get_sd_referral_send(TALLOC_CTX *mem_ctx, struct tevent_req *req; struct ad_gpo_get_sd_referral_state *state; struct tevent_req *subreq; - LDAPURLDesc *lud; + LDAPURLDesc *lud = NULL; req = tevent_req_create(mem_ctx, &state, struct ad_gpo_get_sd_referral_state); @@ -4390,15 +4390,18 @@ ad_gpo_get_sd_referral_send(TALLOC_CTX *mem_ctx, */ state->ref_domain = find_domain_by_name(state->host_domain, lud->lud_host, true); - ldap_free_urldesc(lud); if (!state->ref_domain) { DEBUG(SSSDBG_CRIT_FAILURE, "Could not find domain matching [%s]\n", lud->lud_host); + ldap_free_urldesc(lud); ret = EIO; goto done; } + ldap_free_urldesc(lud); + lud = NULL; + state->conn = ad_get_dom_ldap_conn(state->access_ctx->ad_id_ctx, state->ref_domain); if (!state->conn) {