From 8561eae60ff9417a50fa1fb2b83ae950dc5c1e21 Mon Sep 17 00:00:00 2001 From: "Michael J. Ruhl" Date: Sun, 9 Apr 2017 10:15:51 -0700 Subject: [PATCH] IB/core: For multicast functions, verify that LIDs are multicast LIDs The Infiniband spec defines "A multicast address is defined by a MGID and a MLID" (section 10.5). Currently the MLID value is not validated. Add check to verify that the MLID value is in the correct address range. Fixes: 0c33aeedb2cf ("[IB] Add checks to multicast attach and detach") Cc: stable@vger.kernel.org Reviewed-by: Ira Weiny Reviewed-by: Dasaratharaman Chandramouli Signed-off-by: Michael J. Ruhl Signed-off-by: Dennis Dalessandro Reviewed-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/core/verbs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 85ed5051fdfd..207e5c2457cc 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -1519,7 +1519,9 @@ int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) if (!qp->device->attach_mcast) return -ENOSYS; - if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) + if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD || + lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || + lid == be16_to_cpu(IB_LID_PERMISSIVE)) return -EINVAL; ret = qp->device->attach_mcast(qp, gid, lid); @@ -1535,7 +1537,9 @@ int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) if (!qp->device->detach_mcast) return -ENOSYS; - if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) + if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD || + lid < be16_to_cpu(IB_MULTICAST_LID_BASE) || + lid == be16_to_cpu(IB_LID_PERMISSIVE)) return -EINVAL; ret = qp->device->detach_mcast(qp, gid, lid); -- 2.20.1