29 lines
661 B
Go
29 lines
661 B
Go
// +build amd64
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// +build linux darwin
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package sha1_test
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import (
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"crypto/sha1"
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"syscall"
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"testing"
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)
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func TestOutOfBoundsRead(t *testing.T) {
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const pageSize = 4 << 10
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data, err := syscall.Mmap(0, 0, 2*pageSize, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANON|syscall.MAP_PRIVATE)
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if err != nil {
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panic(err)
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}
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if err := syscall.Mprotect(data[pageSize:], syscall.PROT_NONE); err != nil {
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panic(err)
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}
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for i := 0; i < pageSize; i++ {
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sha1.Sum(data[pageSize-i : pageSize])
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}
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}
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