Cap iovec array length in //pkg/sentry/hostfd.

PiperOrigin-RevId: 341001328

1 files changed, 18 insertions, 0 deletions

diff --git a/pkg/sentry/hostfd/hostfd_linux.go b/pkg/sentry/hostfd/hostfd_linux.go
new file mode 100644
index 000000000..1cabc848f
--- /dev/null
+++ b/pkg/sentry/hostfd/hostfd_linux.go
@@ -0,0 +1,18 @@
+// Copyright 2020 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hostfd
+
+// maxIov is the maximum permitted size of a struct iovec array.
+const maxIov = 1024 // UIO_MAXIOV