From 81e757b7b1d69893b5725f9c148c55d89c779e7b Mon Sep 17 00:00:00 2001
From: Sumit Bose <sbose@redhat.com>
Date: Tue, 3 Nov 2020 10:12:15 +0100
Subject: [PATCH] ifp: fix use-after-free
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The variable fqdn is pointing to some data from state->res->msgs[0]. But
before fqdn is used in the next search state->res and the memory
hierarchy below is freed. As a result the location where fqdn is pointing
to might hold the expected data or other data and the search will fail
intermittently.

Resolves: https://github.com/SSSD/sssd/issues/5382

Reviewed-by: Pavel Březina <pbrezina@redhat.com>
---
 src/responder/ifp/ifpsrv_cmd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/responder/ifp/ifpsrv_cmd.c b/src/responder/ifp/ifpsrv_cmd.c
index 9f20bf2db..d95618127 100644
--- a/src/responder/ifp/ifpsrv_cmd.c
+++ b/src/responder/ifp/ifpsrv_cmd.c
@@ -128,6 +128,7 @@ static void ifp_user_get_attr_done(struct tevent_req *subreq)
         tevent_req_error(req, ERR_INTERNAL);
         return;
     }
+    fqdn = talloc_steal(state, fqdn);
 
     if (state->search_type == SSS_DP_USER) {
         /* throw away the result and perform attr search */
-- 
2.21.3