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| author |   Leon Romanovsky <leonro@mellanox.com> | 2020-06-02 15:55:46 +0300 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2020-06-03 15:45:01 -0300 |
| commit | 6512f11d386c7cf83a48e71cfd7c7c1b0003c151 (patch) | |
| tree | fe97b032132c73bcdcad6318c3d64ecd86b43478 /drivers/infiniband | |
| parent | IB/hfi1: Use free_netdev() in hfi1_netdev_free() (diff) | |
| download | wireguard-linux-6512f11d386c7cf83a48e71cfd7c7c1b0003c151.tar.xz wireguard-linux-6512f11d386c7cf83a48e71cfd7c7c1b0003c151.zip | |
RDMA/mlx5: Return an error if copy_to_user fails
In theoretical event, the ib_copy_to_udata() can fail, so return -EFAULT
error to the user, so he will destroy the QP.
Fixes: 50aec2c3135e ("RDMA/mlx5: Return ECE data after modify QP")
Link: https://lore.kernel.org/r/20200602125548.172654-2-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/qp.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index 9364a7a76ac2..9f0b7f1908da 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -4305,12 +4305,8 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, /* resp.response_length is set in ECE supported flows only */ if (!err && resp.response_length && udata->outlen >= resp.response_length) - /* - * We don't check return value of the function below - * on purpose, because it is unclear how to unwind the - * error flow after QP was modified to the new state. - */ - ib_copy_to_udata(udata, &resp, resp.response_length); + /* Return -EFAULT to the user and expect him to destroy QP. */ + err = ib_copy_to_udata(udata, &resp, resp.response_length); out: mutex_unlock(&qp->mutex); |