[Samba] Samba does not response STATUS_INVALID_PARAMETER when opening 2 objects with same lease key

haihua yang hhyangdev at gmail.com
Wed Jun 2 21:46:16 UTC 2021

According to MS-SMB2
it should respond STATUS_INVALID_PARAMETER when a client opens 2 different
objects with the same lease key, but samba successfully opens both files
and sends a lease break to the client. And since there are 2 fsp with
different file_id sharing the same lease, the lease_timeout_handler does
not find the right fsp to downgrade the lease, hence it keeps the lease in
the breaking state if the client does not close the opens..
Looks like the cause is in function lease_match_parser, it first compares
the file id and NOT_GRANTED if it mismatches,
5361         for (i = 0; i < num_files; i++) {
5362                 const struct leases_db_file *f = &files[i];
5364                 /* Everything should be the same. */
5365                 if (!file_id_equal(&state->id, &f->id)) {
5366                         /* This should catch all dynamic share cases.
5367                         state->match_status =
5368                         break;
5369                 }


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