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IB/hfi1: Ensure ucast_dlid access doesnt exceed bounds 

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: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Dennis Dalessandro 2018-09-26 10:55:53 -07:00 committed by Jason Gunthorpe
parent 15b796bc3d
commit 3144533bf6
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.c
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@ -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];
}
}