IB/core: When marshaling ucma path from user-space, clear unused fields

When marshaling a user path to the kernel struct ib_sa_path, we need
to zero smac and dmac and set the vlan id to the "no vlan" value.

This is to ensure that Ethernet attributes are not used with
InfiniBand QPs.

Fixes: dd5f03beb4f7 ("IB/core: Ethernet L2 attributes in verbs/cm structures")
Signed-off-by: Ilya Nelkenbaum <ilyan@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 56a4b7ca7ee3..45d67e9228d7 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -1124,6 +1124,9 @@ static int ucma_set_ib_path(struct ucma_context *ctx,
         if (!optlen)
                 return -EINVAL;
 
+        memset(&sa_path, 0, sizeof(sa_path));
+        sa_path.vlan_id = 0xffff;
+
         ib_sa_unpack_path(path_data->path_rec, &sa_path);
         ret = rdma_set_ib_paths(ctx->cm_id, &sa_path, 1);
         if (ret)