1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
// Copyright 2024 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 manager
import (
"bytes"
"fmt"
"path/filepath"
"sort"
"sync"
"text/tabwriter"
"time"
"github.com/google/syzkaller/pkg/log"
"github.com/google/syzkaller/pkg/osutil"
)
type DiffBug struct {
Title string
Base DiffBugInfo
Patched DiffBugInfo
}
func (bug DiffBug) PatchedOnly() bool {
return bug.Base.NotCrashed && bug.Patched.Crashes > 0
}
func (bug DiffBug) AffectsBoth() bool {
return bug.Base.Crashes > 0 && bug.Patched.Crashes > 0
}
type DiffBugInfo struct {
Crashes int // Count of detected crashes.
NotCrashed bool // If were proven not to crash by running a repro.
// File paths.
Report string
Repro string
ReproLog string
CrashLog string
}
// DiffFuzzerStore provides the functionality of a database of the patch fuzzing.
type DiffFuzzerStore struct {
BasePath string
mu sync.Mutex
bugs map[string]*DiffBug
}
func (s *DiffFuzzerStore) BaseCrashed(title string, report []byte) {
s.patch(title, func(obj *DiffBug) {
obj.Base.Crashes++
if len(report) > 0 {
obj.Base.Report = s.saveFile(title, "base_report", report)
}
})
}
func (s *DiffFuzzerStore) EverCrashedBase(title string) bool {
s.mu.Lock()
defer s.mu.Unlock()
obj := s.bugs[title]
return obj != nil && obj.Base.Crashes > 0
}
func (s *DiffFuzzerStore) BaseNotCrashed(title string) {
s.patch(title, func(obj *DiffBug) {
if obj.Base.Crashes == 0 {
obj.Base.NotCrashed = true
}
})
}
func (s *DiffFuzzerStore) PatchedCrashed(title string, report, log []byte) {
s.patch(title, func(obj *DiffBug) {
obj.Patched.Crashes++
if len(report) > 0 {
obj.Patched.Report = s.saveFile(title, "patched_report", report)
}
if len(log) > 0 && obj.Patched.CrashLog == "" {
obj.Patched.CrashLog = s.saveFile(title, "patched_crash_log", log)
}
})
}
func (s *DiffFuzzerStore) SaveRepro(result *ReproResult) {
title := result.Crash.Report.Title
if result.Repro != nil {
// If there's a repro, save under the new title.
title = result.Repro.Report.Title
}
now := time.Now().Unix()
crashLog := fmt.Sprintf("%v.crash.log", now)
s.saveFile(title, crashLog, result.Crash.Output)
log.Logf(0, "%q: saved crash log into %s", title, crashLog)
s.patch(title, func(obj *DiffBug) {
if result.Repro != nil {
obj.Patched.Repro = s.saveFile(title, reproFileName, result.Repro.Prog.Serialize())
}
if result.Stats != nil {
reproLog := fmt.Sprintf("%v.repro.log", now)
obj.Patched.ReproLog = s.saveFile(title, reproLog, result.Stats.FullLog())
log.Logf(0, "%q: saved repro log into %s", title, reproLog)
}
})
}
func (s *DiffFuzzerStore) List() []DiffBug {
s.mu.Lock()
defer s.mu.Unlock()
var list []DiffBug
for _, obj := range s.bugs {
list = append(list, *obj)
}
return list
}
func (s *DiffFuzzerStore) PlainTextDump() []byte {
list := s.List()
sort.Slice(list, func(i, j int) bool {
// Put patched-only on top, otherwise sort by the title.
first, second := list[i].PatchedOnly(), list[j].PatchedOnly()
if first != second {
return first
}
return list[i].Title < list[j].Title
})
var buf bytes.Buffer
w := tabwriter.NewWriter(&buf, 0, 0, 1, ' ', 0)
fmt.Fprintln(w, "Title\tOn-Base\tOn-Patched")
printInfo := func(info *DiffBugInfo) {
if info.Crashes > 0 {
fmt.Fprintf(w, "%d crashes", info.Crashes)
}
if info.Repro != "" {
fmt.Fprintf(w, "[reproduced]")
}
}
for _, item := range list {
fmt.Fprintf(w, "%s\t", item.Title)
printInfo(&item.Base)
fmt.Fprintf(w, "\t")
printInfo(&item.Patched)
fmt.Fprintf(w, "\n")
}
w.Flush()
return buf.Bytes()
}
func (s *DiffFuzzerStore) saveFile(title, name string, data []byte) string {
hash := crashHash(title)
path := filepath.Join(s.BasePath, "crashes", hash)
osutil.MkdirAll(path)
osutil.WriteFile(filepath.Join(path, name), data)
return filepath.Join("crashes", hash, name)
}
func (s *DiffFuzzerStore) patch(title string, cb func(*DiffBug)) {
s.mu.Lock()
defer s.mu.Unlock()
if s.bugs == nil {
s.bugs = map[string]*DiffBug{}
}
obj, ok := s.bugs[title]
if !ok {
obj = &DiffBug{Title: title}
s.bugs[title] = obj
}
cb(obj)
}
|
