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Commit e094f4f1 authored Jun 22, 2009 by Mikulas Patocka Committed by Alasdair G Kergon Jun 22, 2009

dm mpath: validate hw_handler argument count



Fix arg count parsing error in hw handlers.

Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair 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) {