1 // +build amd64 2 // +build linux darwin 3 4 // Copyright 2016 The Go Authors. All rights reserved. 5 // Use of this source code is governed by a BSD-style 6 // license that can be found in the LICENSE file. 7 8 package sha1_test 9 10 import ( 11 "crypto/sha1" 12 "syscall" 13 "testing" 14 ) 15 16 func TestOutOfBoundsRead(t *testing.T) { 17 const pageSize = 4 << 10 18 data, err := syscall.Mmap(0, 0, 2*pageSize, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANON|syscall.MAP_PRIVATE) 19 if err != nil { 20 panic(err) 21 } 22 if err := syscall.Mprotect(data[pageSize:], syscall.PROT_NONE); err != nil { 23 panic(err) 24 } 25 for i := 0; i < pageSize; i++ { 26 sha1.Sum(data[pageSize-i : pageSize]) 27 } 28 } 29
