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authorLeon Romanovsky <leonro@mellanox.com>2018-06-24 11:23:42 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-08-03 07:55:26 +0200
commit40af3250e9f283bdf228f845e3aab23c30ede7f1 (patch)
tree1cbf70acc82043b72bad87e9cc0ce2dc4e77c3c8 /drivers
parent262a62cc50697246eeb431b970db6b3ee35c33f3 (diff)
RDMA/uverbs: Protect from attempts to create flows on unsupported QP
commit 940efcc8889f0d15567eb07fc9fd69b06e366aa5 upstream. 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: 436f2ad05a0b ("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> Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/core/uverbs_cmd.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 4b717cf50d27..6f875bf9cc9d 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -3725,6 +3725,11 @@ 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(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
sizeof(union ib_flow_spec), GFP_KERNEL);
if (!flow_attr) {