Source file
src/crypto/sha1/issue15617_test.go
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9 package sha1_test
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11 import (
12 "crypto/sha1"
13 "syscall"
14 "testing"
15 )
16
17 func TestOutOfBoundsRead(t *testing.T) {
18 const pageSize = 4 << 10
19 data, err := syscall.Mmap(0, 0, 2*pageSize, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANON|syscall.MAP_PRIVATE)
20 if err != nil {
21 panic(err)
22 }
23 if err := syscall.Mprotect(data[pageSize:], syscall.PROT_NONE); err != nil {
24 panic(err)
25 }
26 for i := 0; i < pageSize; i++ {
27 sha1.Sum(data[pageSize-i : pageSize])
28 }
29 }
30
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