Commit 449b9ae3 authored by Dennis Dalessandro's avatar Dennis Dalessandro Committed by Greg Kroah-Hartman

IB/hfi1: Ensure ucast_dlid access doesnt exceed bounds

[ Upstream commit 3144533b ]

The dlid assignment made by looking into the u_ucast_dlid array does not
do an explicit check for the size of the array. The code path to arrive at
def_port, the index value is long and complicated so its best to just have
an explicit check here.
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent e0dee1c8
......@@ -351,7 +351,8 @@ static uint32_t opa_vnic_get_dlid(struct opa_vnic_adapter *adapter,
if (unlikely(!dlid))
v_warn("Null dlid in MAC address\n");
} else if (def_port != OPA_VNIC_INVALID_PORT) {
dlid = info->vesw.u_ucast_dlid[def_port];
if (def_port < OPA_VESW_MAX_NUM_DEF_PORT)
dlid = info->vesw.u_ucast_dlid[def_port];
}
}
......
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