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Commit e094f4f1 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Alasdair G Kergon
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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
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+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) {