This is a note to let you know that I've just added the patch titled

IB/core: Don't enforce PKey security on SMI MADs

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: ib-core-don-t-enforce-pkey-security-on-smi-mads.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 0fbe8f575b15585eec3326e43708fbbc024e8486 Mon Sep 17 00:00:00 2001

From: Daniel Jurgens danielj@mellanox.com Date: Tue, 5 Dec 2017 22:30:02 +0200 Subject: IB/core: Don't enforce PKey security on SMI MADs

From: Daniel Jurgens danielj@mellanox.com

commit 0fbe8f575b15585eec3326e43708fbbc024e8486 upstream.

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 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 Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/infiniband/core/security.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/core/security.c +++ b/drivers/infiniband/core/security.c @@ -739,8 +739,11 @@ int ib_mad_enforce_security(struct ib_ma 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,

Patches currently in stable-queue which might be from danielj@mellanox.com are

queue-4.14/ib-core-don-t-enforce-pkey-security-on-smi-mads.patch queue-4.14/ib-core-bound-check-alternate-path-port-number.patch