libcli/named_pipe_auth: fix memory handling for temporary data

In a tevent_req based function tevent_req_create() should be the first
function! If it fails it's the only reason, why the function
could every return NULL.

And all temporary data belongs to 'state' and gets free'ed by
tevent_req_received() in the _recv function.

metze

1 files changed, 6 insertions, 5 deletions

diff --git a/libcli/named_pipe_auth/npa_tstream.c b/libcli/named_pipe_auth/npa_tstream.c
index 351858408c..59d3a97dc0 100644
--- a/libcli/named_pipe_auth/npa_tstream.c
+++ b/libcli/named_pipe_auth/npa_tstream.c
@@ -73,11 +73,7 @@ struct tevent_req *tstream_npa_connect_send(TALLOC_CTX *mem_ctx,
 	struct tevent_req *subreq;
 	int ret;
 	enum ndr_err_code ndr_err;
-	char *lower_case_npipe = strlower_talloc(mem_ctx, npipe);
-
-	if (!lower_case_npipe) {
-		return NULL;
-	}
+	char *lower_case_npipe;
 
 	req = tevent_req_create(mem_ctx, &state,
 				struct tstream_npa_connect_state);
@@ -87,6 +83,11 @@ struct tevent_req *tstream_npa_connect_send(TALLOC_CTX *mem_ctx,
 
 	state->caller.ev = ev;
 
+	lower_case_npipe = strlower_talloc(state, npipe);
+	if (tevent_req_nomem(lower_case_npipe, req)) {
+		goto post;
+	}
+
 	state->unix_path = talloc_asprintf(state, "%s/%s",
 					   directory,
 					   lower_case_npipe);