From: Daniel Jurgens danielj@mellanox.com

Per the infiniband spec an SMI MAD can have any PKey. Checking the pkey on SMI MADs is not necessary, and it seems that some older adapters using the mthca driver don't follow the convention of using the default PKey, resulting in false denials, or errors querying the PKey cache.

SMI MAD security is still enforced, only agents allowed to manage the subnet are able to receive or send SMI MADs.

Reported-by: Chris Blake chrisrblake93@gmail.com Cc: stable@vger.kernel.org # v4.12 Fixes: 47a2b338fe63 ("IB/core: Enforce security on management datagrams") Signed-off-by: Daniel Jurgens danielj@mellanox.com Reviewed-by: Parav Pandit parav@mellanox.com Signed-off-by: Leon Romanovsky leon@kernel.org --- drivers/infiniband/core/security.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/core/security.c b/drivers/infiniband/core/security.c index a337386652b0..feafdb961c48 100644 --- a/drivers/infiniband/core/security.c +++ b/drivers/infiniband/core/security.c @@ -739,8 +739,11 @@ int ib_mad_enforce_security(struct ib_mad_agent_private *map, u16 pkey_index) if (!rdma_protocol_ib(map->agent.device, map->agent.port_num)) return 0;

- if (map->agent.qp->qp_type == IB_QPT_SMI && !map->agent.smp_allowed) - return -EACCES; + if (map->agent.qp->qp_type == IB_QPT_SMI) { + if (!map->agent.smp_allowed) + return -EACCES; + return 0; + }

return ib_security_pkey_access(map->agent.device, map->agent.port_num,