s3:smbd: perform impersonation in smb2_query_directory_dos_mode_done()

This is needed as the callback might be called in an arbitrary
impersonation state.

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

diff --git a/source3/smbd/smb2_query_directory.c b/source3/smbd/smb2_query_directory.c
index fdb87188f93386018ec2eefe920d220ad596bf3e..2a426a0dfa3843465df609e0a52d8405d00a8a5a 100644 (file)
--- a/source3/smbd/smb2_query_directory.c
+++ b/source3/smbd/smb2_query_directory.c
@@ -752,6 +752,13 @@ static void smb2_query_directory_dos_mode_done(struct tevent_req *subreq)
                tevent_req_data(req,
                struct smbd_smb2_query_directory_state);
        NTSTATUS status;
+       bool ok;
+
+       /*
+        * Make sure we run as the user again
+        */
+       ok = change_to_user_by_fsp(state->fsp);
+       SMB_ASSERT(ok);
 
        status = fetch_dos_mode_recv(subreq);
        TALLOC_FREE(subreq);