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authorEli Cohen <eli@dev.mellanox.co.il>2014-01-15 14:56:44 +0200
committerRoland Dreier <roland@purestorage.com>2014-01-22 23:23:54 -0800
commit57761d8df8efc7cc1227f9bc22e0dda01b0dd91b (patch)
tree0b06de67513b07eb444a5fc735ec727959bc3d87 /drivers/infiniband
parent8c8a49148b95c4d7c5f58a6866a30ea02485d7a3 (diff)
downloadop-kernel-dev-57761d8df8efc7cc1227f9bc22e0dda01b0dd91b.zip
op-kernel-dev-57761d8df8efc7cc1227f9bc22e0dda01b0dd91b.tar.gz
IB/mlx5: Verify reserved fields are cleared
Verify that reserved fields in struct mlx5_ib_resize_cq are cleared before continuing execution of the verb. This is required to allow making use of this area in future revisions. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Signed-off-by: Eli Cohen <eli@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mlx5/cq.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 50b03a8..b1705ce 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -877,8 +877,12 @@ static int resize_user(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq,
int npages;
struct ib_ucontext *context = cq->buf.umem->context;
- if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
- return -EFAULT;
+ err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
+ if (err)
+ return err;
+
+ if (ucmd.reserved0 || ucmd.reserved1)
+ return -EINVAL;
umem = ib_umem_get(context, ucmd.buf_addr, entries * ucmd.cqe_size,
IB_ACCESS_LOCAL_WRITE, 1);
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