Commit e094f4f1 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Alasdair G Kergon
Browse files

dm mpath: validate hw_handler argument count 



Fix arg count parsing error in hw handlers.

Cc: stable@kernel.org
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 0e0497c0

drivers/md/dm-mpath.c

+5 −0
Original line number Diff line number Diff line
@@ -705,6 +705,11 @@ static int parse_hw_handler(struct arg_set *as, struct multipath *m) 
	if (!hw_argc)

		return 0;



	if (hw_argc > as->argc) {

		ti->error = "not enough arguments for hardware handler";

		return -EINVAL;

	}



	m->hw_handler_name = kstrdup(shift(as), GFP_KERNEL);

	request_module("scsi_dh_%s", m->hw_handler_name);

	if (scsi_dh_handler_exist(m->hw_handler_name) == 0) {