mirror of
https://github.com/reactos/syzkaller.git
synced 2025-02-21 20:22:28 +00:00
373 lines
10 KiB
Go
373 lines
10 KiB
Go
// Copyright 2015 syzkaller project authors. All rights reserved.
|
|
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
|
|
|
|
package prog
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"math/rand"
|
|
"testing"
|
|
)
|
|
|
|
func TestClone(t *testing.T) {
|
|
target, rs, iters := initTest(t)
|
|
for i := 0; i < iters; i++ {
|
|
p := target.Generate(rs, 10, nil)
|
|
p1 := p.Clone()
|
|
data := p.Serialize()
|
|
data1 := p1.Serialize()
|
|
if !bytes.Equal(data, data1) {
|
|
t.Fatalf("program changed after clone\noriginal:\n%s\n\nnew:\n%s\n", data, data1)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestMutateRandom(t *testing.T) {
|
|
target, rs, iters := initTest(t)
|
|
next:
|
|
for i := 0; i < iters; i++ {
|
|
p := target.Generate(rs, 10, nil)
|
|
data0 := p.Serialize()
|
|
p1 := p.Clone()
|
|
// There is a chance that mutation will produce the same program.
|
|
// So we check that at least 1 out of 10 mutations actually change the program.
|
|
for try := 0; try < 10; try++ {
|
|
p1.Mutate(rs, 10, nil, nil)
|
|
data := p.Serialize()
|
|
if !bytes.Equal(data0, data) {
|
|
t.Fatalf("program changed after clone/mutate\noriginal:\n%s\n\nnew:\n%s\n",
|
|
data0, data)
|
|
}
|
|
data1 := p1.Serialize()
|
|
if bytes.Equal(data, data1) {
|
|
continue
|
|
}
|
|
if _, err := target.Deserialize(data1); err != nil {
|
|
t.Fatalf("Deserialize failed after Mutate: %v\n%s", err, data1)
|
|
}
|
|
continue next
|
|
}
|
|
t.Fatalf("mutation does not change program:\n%s", data0)
|
|
}
|
|
}
|
|
|
|
func TestMutateCorpus(t *testing.T) {
|
|
target, rs, iters := initTest(t)
|
|
var corpus []*Prog
|
|
for i := 0; i < 100; i++ {
|
|
p := target.Generate(rs, 10, nil)
|
|
corpus = append(corpus, p)
|
|
}
|
|
for i := 0; i < iters; i++ {
|
|
p1 := target.Generate(rs, 10, nil)
|
|
p1.Mutate(rs, 10, nil, corpus)
|
|
}
|
|
}
|
|
|
|
func TestMutateTable(t *testing.T) {
|
|
target := initTargetTest(t, "test", "64")
|
|
tests := [][2]string{
|
|
// Insert a call.
|
|
{`
|
|
mutate0()
|
|
mutate2()
|
|
`, `
|
|
mutate0()
|
|
mutate1()
|
|
mutate2()
|
|
`},
|
|
// Remove calls and update args.
|
|
{`
|
|
r0 = mutate5(&(0x7f0000000000)="2e2f66696c653000", 0x0)
|
|
mutate0()
|
|
mutate6(r0, &(0x7f0000000000)="00", 0x1)
|
|
mutate1()
|
|
`, `
|
|
mutate0()
|
|
mutate6(0xffffffffffffffff, &(0x7f0000000000)="00", 0x1)
|
|
mutate1()
|
|
`},
|
|
// Mutate flags.
|
|
{`
|
|
r0 = mutate5(&(0x7f0000000000)="2e2f66696c653000", 0x0)
|
|
mutate0()
|
|
mutate6(r0, &(0x7f0000000000)="00", 0x1)
|
|
mutate1()
|
|
`, `
|
|
r0 = mutate5(&(0x7f0000000000)="2e2f66696c653000", 0xcdcdcdcdcdcdcdcd)
|
|
mutate0()
|
|
mutate6(r0, &(0x7f0000000000)="00", 0x1)
|
|
mutate1()
|
|
`},
|
|
// Mutate data (delete byte and update size).
|
|
{`
|
|
mutate4(&(0x7f0000000000)="11223344", 0x4)
|
|
`, `
|
|
mutate4(&(0x7f0000000000)="112244", 0x3)
|
|
`},
|
|
// Mutate data (insert byte and update size).
|
|
// TODO: this is not working, because Mutate constantly tends
|
|
// update addresses and insert mmap's.
|
|
/*
|
|
{`
|
|
mutate4(&(0x7f0000000000)="1122", 0x2)
|
|
`, `
|
|
mutate4(&(0x7f0000000000)="112200", 0x3)
|
|
`},
|
|
*/
|
|
// Mutate data (change byte).
|
|
{`
|
|
mutate4(&(0x7f0000000000)="1122", 0x2)
|
|
`, `
|
|
mutate4(&(0x7f0000000000)="1100", 0x2)
|
|
`},
|
|
// Change filename.
|
|
{`
|
|
mutate5(&(0x7f0000001000)="2e2f66696c653000", 0x22c0)
|
|
mutate5(&(0x7f0000001000)="2e2f66696c653000", 0x22c0)
|
|
`, `
|
|
mutate5(&(0x7f0000001000)="2e2f66696c653000", 0x22c0)
|
|
mutate5(&(0x7f0000001000)="2e2f66696c653100", 0x22c0)
|
|
`},
|
|
// Extend an array.
|
|
{`
|
|
mutate3(&(0x7f0000000000)=[0x1, 0x1], 0x2)
|
|
`, `
|
|
mmap(&(0x7f0000000000/0x1000)=nil, 0x1000)
|
|
mutate3(&(0x7f0000000000)=[0x1, 0x1, 0x1], 0x3)
|
|
`},
|
|
// Mutate size from it's natural value.
|
|
{`
|
|
mutate7(&(0x7f0000000000)='123', 0x3)
|
|
`, `
|
|
mutate7(&(0x7f0000000000)='123', 0x2)
|
|
`},
|
|
// Mutate proc to the special value.
|
|
{`
|
|
mutate8(0x2)
|
|
`, `
|
|
mutate8(0xffffffffffffffff)
|
|
`},
|
|
}
|
|
for ti, test := range tests {
|
|
test := test
|
|
t.Run(fmt.Sprint(ti), func(t *testing.T) {
|
|
t.Parallel()
|
|
p, err := target.Deserialize([]byte(test[0]))
|
|
if err != nil {
|
|
t.Fatalf("failed to deserialize original program: %v", err)
|
|
}
|
|
goal, err := target.Deserialize([]byte(test[1]))
|
|
if err != nil {
|
|
t.Fatalf("failed to deserialize goal program: %v", err)
|
|
}
|
|
want := goal.Serialize()
|
|
enabled := make(map[*Syscall]bool)
|
|
for _, c := range p.Calls {
|
|
enabled[c.Meta] = true
|
|
}
|
|
for _, c := range goal.Calls {
|
|
enabled[c.Meta] = true
|
|
}
|
|
ct := target.BuildChoiceTable(nil, enabled)
|
|
rs := rand.NewSource(0)
|
|
for i := 0; i < 1e5; i++ {
|
|
p1 := p.Clone()
|
|
p1.Mutate(rs, len(goal.Calls), ct, nil)
|
|
data1 := p1.Serialize()
|
|
if bytes.Equal(want, data1) {
|
|
t.Logf("success on iter %v", i)
|
|
return
|
|
}
|
|
}
|
|
t.Fatalf("failed to achieve goal, original:%s\ngoal:%s", test[0], test[1])
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestMinimize(t *testing.T) {
|
|
tests := []struct {
|
|
orig string
|
|
callIndex int
|
|
pred func(*Prog, int) bool
|
|
result string
|
|
resultCallIndex int
|
|
}{
|
|
// Predicate always returns false, so must get the same program.
|
|
{
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n" +
|
|
"sched_yield()\n" +
|
|
"pipe2(&(0x7f0000000000)={0x0, 0x0}, 0x0)\n",
|
|
2,
|
|
func(p *Prog, callIndex int) bool {
|
|
if len(p.Calls) == 0 {
|
|
t.Fatalf("got an empty program")
|
|
}
|
|
if p.Calls[len(p.Calls)-1].Meta.Name != "pipe2" {
|
|
t.Fatalf("last call is removed")
|
|
}
|
|
return false
|
|
},
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n" +
|
|
"sched_yield()\n" +
|
|
"pipe2(&(0x7f0000000000)={0x0, 0x0}, 0x0)\n",
|
|
2,
|
|
},
|
|
// Remove a call.
|
|
{
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n" +
|
|
"sched_yield()\n" +
|
|
"pipe2(&(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0)\n",
|
|
2,
|
|
func(p *Prog, callIndex int) bool {
|
|
// Aim at removal of sched_yield.
|
|
return len(p.Calls) == 2 && p.Calls[0].Meta.Name == "mmap" && p.Calls[1].Meta.Name == "pipe2"
|
|
},
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x0, 0x0, 0xffffffffffffffff, 0x0)\n" +
|
|
"pipe2(&(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0)\n",
|
|
1,
|
|
},
|
|
// Remove two dependent calls.
|
|
{
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n" +
|
|
"pipe2(&(0x7f0000000000)={0x0, 0x0}, 0x0)\n" +
|
|
"sched_yield()\n",
|
|
2,
|
|
func(p *Prog, callIndex int) bool {
|
|
// Aim at removal of pipe2 and then mmap.
|
|
if len(p.Calls) == 2 && p.Calls[0].Meta.Name == "mmap" && p.Calls[1].Meta.Name == "sched_yield" {
|
|
return true
|
|
}
|
|
if len(p.Calls) == 1 && p.Calls[0].Meta.Name == "sched_yield" {
|
|
return true
|
|
}
|
|
return false
|
|
},
|
|
"sched_yield()\n",
|
|
0,
|
|
},
|
|
// Remove a call and replace results.
|
|
{
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n" +
|
|
"pipe2(&(0x7f0000000000)={<r0=>0x0, 0x0}, 0x0)\n" +
|
|
"write(r0, &(0x7f0000000000)=\"1155\", 0x2)\n" +
|
|
"sched_yield()\n",
|
|
3,
|
|
func(p *Prog, callIndex int) bool {
|
|
return p.String() == "mmap-write-sched_yield"
|
|
},
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x0, 0x0, 0xffffffffffffffff, 0x0)\n" +
|
|
"write(0xffffffffffffffff, &(0x7f0000000000)=\"\", 0x0)\n" +
|
|
"sched_yield()\n",
|
|
2,
|
|
},
|
|
// Remove a call and replace results.
|
|
{
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n" +
|
|
"r0=open(&(0x7f0000000000)=\"1155\", 0x0, 0x0)\n" +
|
|
"write(r0, &(0x7f0000000000)=\"1155\", 0x2)\n" +
|
|
"sched_yield()\n",
|
|
-1,
|
|
func(p *Prog, callIndex int) bool {
|
|
return p.String() == "mmap-write-sched_yield"
|
|
},
|
|
"mmap(&(0x7f0000000000/0x1000)=nil, 0x1000, 0x0, 0x0, 0xffffffffffffffff, 0x0)\n" +
|
|
"write(0xffffffffffffffff, &(0x7f0000000000)=\"\", 0x0)\n" +
|
|
"sched_yield()\n",
|
|
-1,
|
|
},
|
|
// Glue several mmaps together.
|
|
{
|
|
"sched_yield()\n" +
|
|
"mmap(&(0x7f0000010000/0x1000)=nil, 0x1000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n" +
|
|
"mmap(&(0x7f0000011000/0x1000)=nil, 0x1000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n" +
|
|
"getpid()\n" +
|
|
"mmap(&(0x7f0000015000/0x5000)=nil, 0x2000, 0x3, 0x32, 0xffffffffffffffff, 0x0)\n",
|
|
3,
|
|
func(p *Prog, callIndex int) bool {
|
|
return p.String() == "mmap-sched_yield-getpid"
|
|
},
|
|
"mmap(&(0x7f0000010000/0x7000)=nil, 0x7000, 0x0, 0x0, 0xffffffffffffffff, 0x0)\n" +
|
|
"sched_yield()\n" +
|
|
"getpid()\n",
|
|
2,
|
|
},
|
|
}
|
|
target, _, _ := initTest(t)
|
|
for ti, test := range tests {
|
|
p, err := target.Deserialize([]byte(test.orig))
|
|
if err != nil {
|
|
t.Fatalf("failed to deserialize original program #%v: %v", ti, err)
|
|
}
|
|
p1, ci := Minimize(p, test.callIndex, test.pred, false)
|
|
res := p1.Serialize()
|
|
if string(res) != test.result {
|
|
t.Fatalf("minimization produced wrong result #%v\norig:\n%v\nexpect:\n%v\ngot:\n%v\n",
|
|
ti, test.orig, test.result, string(res))
|
|
}
|
|
if ci != test.resultCallIndex {
|
|
t.Fatalf("minimization broke call index #%v: got %v, want %v",
|
|
ti, ci, test.resultCallIndex)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestMinimizeRandom(t *testing.T) {
|
|
target, rs, iters := initTest(t)
|
|
iters /= 10 // Long test.
|
|
for i := 0; i < iters; i++ {
|
|
p := target.Generate(rs, 5, nil)
|
|
Minimize(p, len(p.Calls)-1, func(p1 *Prog, callIndex int) bool {
|
|
return false
|
|
}, true)
|
|
Minimize(p, len(p.Calls)-1, func(p1 *Prog, callIndex int) bool {
|
|
return true
|
|
}, true)
|
|
}
|
|
for i := 0; i < iters; i++ {
|
|
p := target.Generate(rs, 5, nil)
|
|
Minimize(p, len(p.Calls)-1, func(p1 *Prog, callIndex int) bool {
|
|
return false
|
|
}, false)
|
|
Minimize(p, len(p.Calls)-1, func(p1 *Prog, callIndex int) bool {
|
|
return true
|
|
}, false)
|
|
}
|
|
}
|
|
|
|
func TestMinimizeCallIndex(t *testing.T) {
|
|
target, rs, iters := initTest(t)
|
|
r := rand.New(rs)
|
|
for i := 0; i < iters; i++ {
|
|
p := target.Generate(rs, 5, nil)
|
|
ci := r.Intn(len(p.Calls))
|
|
p1, ci1 := Minimize(p, ci, func(p1 *Prog, callIndex int) bool {
|
|
return r.Intn(2) == 0
|
|
}, r.Intn(2) == 0)
|
|
if ci1 < 0 || ci1 >= len(p1.Calls) || p.Calls[ci].Meta.Name != p1.Calls[ci1].Meta.Name {
|
|
t.Fatalf("bad call index after minimization")
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkMutate(b *testing.B) {
|
|
olddebug := debug
|
|
debug = false
|
|
defer func() { debug = olddebug }()
|
|
target, err := GetTarget("linux", "amd64")
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
prios := target.CalculatePriorities(nil)
|
|
ct := target.BuildChoiceTable(prios, nil)
|
|
const progLen = 30
|
|
p := target.Generate(rand.NewSource(0), progLen, nil)
|
|
b.RunParallel(func(pb *testing.PB) {
|
|
rs := rand.NewSource(0)
|
|
for pb.Next() {
|
|
p.Clone().Mutate(rs, progLen, ct, nil)
|
|
}
|
|
})
|
|
}
|