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Nayana BidariandgVisor bot
b571d95c8e
This mitigates a race condition where a reused host file descriptor could be unexpectedly closed by a delayed double close call. PiperOrigin-RevId: 945218418
46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
// Copyright 2026 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package stateio
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import (
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"testing"
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"golang.org/x/sys/unix"
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)
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func TestFDWriterDoubleClose(t *testing.T) {
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var fds [2]int
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if err := unix.Pipe(fds[:]); err != nil {
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t.Fatalf("Pipe failed: %v", err)
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}
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readFD := fds[0]
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writeFD := fds[1]
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defer unix.Close(readFD)
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// NewFDWriter takes ownership of writeFD.
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w := NewFDWriter(int32(writeFD), 4096, 1, 1)
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// First close should succeed.
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if err := w.Close(); err != nil {
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t.Fatalf("First Close() failed: %v", err)
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}
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// Second close should also succeed (idempotent) and not return EBADF.
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if err := w.Close(); err != nil {
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t.Fatalf("Second Close() failed: %v", err)
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}
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}
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