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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 07:50:43 +0200
commita61b3378b8473694ebd87e59c8a5dd35839c50fc (patch)
tree649de558dbd108eadd425fe65a7bc6e812f58c94
parentb8e9dd160ca358f1f2aadccfb64eb1a85d6a77da (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>
-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 186dce6bba8f..b8229d7b0ff5 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -3376,6 +3376,11 @@ 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) {