From 6a1da829eaa1eee3e854f0cadc0b6effff776ab4 Mon Sep 17 00:00:00 2001
From: Fabiano Fidêncio <fidencio@redhat.com>
Date: May 15 2017 14:49:07 +0000
Subject: CACHE_REQ: Avoid using of uninitialized value


Commit 4ef0b19a introduced the following warning, as "req" may be used
without being initialized:
src/responder/common/cache_req/cache_req_search.c:
     In function 'cache_req_search_done':
src/responder/common/cache_req/cache_req_search.c:467:9:
     error: 'req' may be used uninitialized in this function
     [-Werror=maybe-uninitialized]
         tevent_req_error(req, ret);
         ^
src/responder/common/cache_req/cache_req_search.c:424:24:
     note: 'req' was declared here
     struct tevent_req *req;
                        ^
cc1: all warnings being treated as errors

In order to fix the issue above, let's just allocate tmp_ctx after "req"
is already set.

Related:
https://pagure.io/SSSD/sssd/issue/3362

Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Co-Author: Lukáš Slebodník <lslebodn@redhat.com>
Reviewed-by: Sumit Bose <sbose@redhat.com>

---

diff --git a/src/responder/common/cache_req/cache_req_search.c b/src/responder/common/cache_req/cache_req_search.c
index 793dbc5..70448a7 100644
--- a/src/responder/common/cache_req/cache_req_search.c
+++ b/src/responder/common/cache_req/cache_req_search.c
@@ -425,18 +425,18 @@ static void cache_req_search_done(struct tevent_req *subreq)
     struct ldb_result *result = NULL;
     errno_t ret;
 
-    tmp_ctx = talloc_new(NULL);
-    if (tmp_ctx == NULL) {
-        ret = ENOMEM;
-        goto done;
-    }
-
     req = tevent_req_callback_data(subreq, struct tevent_req);
     state = tevent_req_data(req, struct cache_req_search_state);
 
     state->dp_success = state->cr->plugin->dp_recv_fn(subreq, state->cr);
     talloc_zfree(subreq);
 
+    tmp_ctx = talloc_new(NULL);
+    if (tmp_ctx == NULL) {
+        ret = ENOMEM;
+        goto done;
+    }
+
     /* Get result from cache again. */
     ret = cache_req_search_cache(tmp_ctx, state->cr, &result);
     if (ret != EOK) {