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Commit 7eb3b86d authored by Ira Weiny's avatar Ira Weiny Committed by Greg Kroah-Hartman
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IB/hfi1: Fix SL array bounds check 



commit 0dbfaa9f2813787679e296eb5476e40938ab48c8 upstream.

The SL specified by a user needs to be a valid SL.

Add a range check to the user specified SL value which protects from
running off the end of the SL to SC table.

CC: stable@vger.kernel.org
Fixes: 77241056 ("IB/hfi1: add driver files")
Signed-off-by: default avatarIra Weiny <ira.weiny@intel.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 61b5997b

drivers/infiniband/hw/hfi1/verbs.c

+7 −1
Original line number Diff line number Diff line
@@ -1511,12 +1511,18 @@ static int hfi1_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr) 
	struct hfi1_pportdata *ppd;

	struct hfi1_devdata *dd;

	u8 sc5;

	u8 sl;



	/* test the mapping for validity */

	ibp = to_iport(ibdev, ah_attr->port_num);

	ppd = ppd_from_ibp(ibp);

	sc5 = ibp->sl_to_sc[ah_attr->sl];

	dd = dd_from_ppd(ppd);



	sl = ah_attr->sl;

	if (sl >= ARRAY_SIZE(ibp->sl_to_sc))

		return -EINVAL;



	sc5 = ibp->sl_to_sc[sl];

	if (sc_to_vlt(dd, sc5) > num_vls && sc_to_vlt(dd, sc5) != 0xf)

		return -EINVAL;

	return 0;