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RDMA/uverbs: Protect from attempts to create flows on unsupported QP

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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: <stable@vger.kernel.org> # 3.11
Fixes: 436f2ad05a ("IB/core: Export ib_create/destroy_flow through uverbs")
Cc: syzkaller <syzkaller@googlegroups.com>
Reported-by: Noa Osherovich <noaos@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky 2018-06-24 11:23:42 +03:00 committed by Jason Gunthorpe
parent 7b72717a20
commit 940efcc888
1 changed files with 5 additions and 0 deletions
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5
drivers/infiniband/core/uverbs_cmd.c
View file

@ -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) {