From 940efcc8889f0d15567eb07fc9fd69b06e366aa5 Mon Sep 17 00:00:00 2001 From: Leon Romanovsky Date: Sun, 24 Jun 2018 11:23:42 +0300 Subject: [PATCH] RDMA/uverbs: Protect from attempts to create flows on unsupported QP Flows can be created on UD and RAW_PACKET QP types. Attempts to provide other QP types as an input causes to various unpredictable failures. The reason is that in order to support all various types (e.g. XRC), we are supposed to use real_qp handle and not qp handle and expect to driver/FW to fail such (XRC) flows. The simpler and safer variant is to ban all QP types except UD and RAW_PACKET, instead of relying on driver/FW. Cc: # 3.11 Fixes: 436f2ad05a0b ("IB/core: Export ib_create/destroy_flow through uverbs") Cc: syzkaller Reported-by: Noa Osherovich Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/core/uverbs_cmd.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 3e90b6a..89c4ce2 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -3559,6 +3559,11 @@ int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, goto err_uobj; } + if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) { + err = -EINVAL; + goto err_put; + } + flow_attr = kzalloc(struct_size(flow_attr, flows, cmd.flow_attr.num_of_specs), GFP_KERNEL); if (!flow_attr) { -- 2.7.4