upstream: perform removal of agent-forwarding directory in forward

setup error path with user's privileged. This is a no-op as this code always
runs with user privilege now that we no longer support running sshd with
privilege separation disabled, but as long as the privsep skeleton is there
we should follow the rules.
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bz#2969 with patch from Erik Sjölund

OpenBSD-Commit-ID: 2b708401a5a8d6133c865d7698d9852210dca846

1 files changed, 3 insertions, 1 deletions

diff --git a/session.c b/session.c
index 96167548a..48cfaafbf 100644
--- a/session.c
+++ b/session.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: session.c,v 1.314 2019/02/10 11:10:57 djm Exp $ */
+/* $OpenBSD: session.c,v 1.315 2019/02/22 03:37:11 djm Exp $ */
 /*
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
@@ -233,7 +233,9 @@ auth_input_request_forwarding(struct ssh *ssh, struct passwd * pw)
  authsock_err:
         free(auth_sock_name);
         if (auth_sock_dir != NULL) {
+                temporarily_use_uid(pw);
                 rmdir(auth_sock_dir);
+                restore_uid();
                 free(auth_sock_dir);
         }
         if (sock != -1)