s3:blocking: call change_to_user_by_fsp() when dbwrap_watched_watch* finishes

This is not strictly required as fd-based calls are used,
but it's more consistent to call SMB_VFS_BRL_LOCK_WINDOWS()
in the same environment on retry.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14113

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

diff --git a/source3/smbd/blocking.c b/source3/smbd/blocking.c
index ffc3142b74c64fef05b87b6209fed2f047677671..ca8a625ba9dd1725ca9b1844d64ce9d662913881 100644 (file)
--- a/source3/smbd/blocking.c
+++ b/source3/smbd/blocking.c
@@ -334,6 +334,15 @@ static void smbd_smb1_do_locks_retry(struct tevent_req *subreq)
        NTSTATUS status;
        bool ok;
 
+       /*
+        * Make sure we run as the user again
+        */
+       ok = change_to_user_by_fsp(state->fsp);
+       if (!ok) {
+               tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
+               return;
+       }
+
        status = dbwrap_watched_watch_recv(subreq, NULL, NULL);
        TALLOC_FREE(subreq);