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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
// 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 report
import (
"fmt"
"regexp"
"testing"
"github.com/google/syzkaller/pkg/symbolizer"
)
func TestLinuxIgnores(t *testing.T) {
reporter, err := NewReporter("linux", "", "", nil, nil)
if err != nil {
t.Fatal(err)
}
ignores1 := []*regexp.Regexp{
regexp.MustCompile("BUG: bug3"),
}
reporter1, err := NewReporter("linux", "", "", nil, ignores1)
if err != nil {
t.Fatal(err)
}
ignores2 := []*regexp.Regexp{
regexp.MustCompile("BUG: bug3"),
regexp.MustCompile("BUG: bug1"),
}
reporter2, err := NewReporter("linux", "", "", nil, ignores2)
if err != nil {
t.Fatal(err)
}
ignores3 := []*regexp.Regexp{
regexp.MustCompile("BUG: bug3"),
regexp.MustCompile("BUG: bug1"),
regexp.MustCompile("BUG: bug2"),
}
reporter3, err := NewReporter("linux", "", "", nil, ignores3)
if err != nil {
t.Fatal(err)
}
const log = `
[ 0.000000] BUG: bug1
[ 0.000000] BUG: bug2
`
if !reporter.ContainsCrash([]byte(log)) {
t.Fatalf("no crash")
}
if rep := reporter.Parse([]byte(log)); rep.Title != "BUG: bug1" {
t.Fatalf("want `BUG: bug1`, found `%v`", rep.Title)
}
if !reporter1.ContainsCrash([]byte(log)) {
t.Fatalf("no crash")
}
if rep := reporter1.Parse([]byte(log)); rep.Title != "BUG: bug1" {
t.Fatalf("want `BUG: bug1`, found `%v`", rep.Title)
}
if !reporter2.ContainsCrash([]byte(log)) {
t.Fatalf("no crash")
}
if rep := reporter2.Parse([]byte(log)); rep.Title != "BUG: bug2" {
t.Fatalf("want `BUG: bug2`, found `%v`", rep.Title)
}
if reporter3.ContainsCrash([]byte(log)) {
t.Fatalf("found crash, should be ignored")
}
if rep := reporter3.Parse([]byte(log)); rep != nil {
t.Fatalf("found `%v`, should be ignored", rep.Title)
}
}
func TestLinuxSymbolizeLine(t *testing.T) {
tests := []struct {
line string
result string
}{
// Normal symbolization.
{
"[ 2713.153531] [<ffffffff82d1b1d9>] foo+0x101/0x185\n",
"[ 2713.153531] [<ffffffff82d1b1d9>] foo+0x101/0x185 foo.c:555\n",
},
{
"RIP: 0010:[<ffffffff8188c0e6>] [<ffffffff8188c0e6>] foo+0x101/0x185\n",
"RIP: 0010:[<ffffffff8188c0e6>] [<ffffffff8188c0e6>] foo+0x101/0x185 foo.c:555\n",
},
// Strip "./" file prefix.
{
"[ 2713.153531] [<ffffffff82d1b1d9>] foo+0x111/0x185\n",
"[ 2713.153531] [<ffffffff82d1b1d9>] foo+0x111/0x185 foo.h:111\n",
},
// Needs symbolization, but symbolizer returns nothing.
{
"[ 2713.153531] [<ffffffff82d1b1d9>] foo+0x121/0x185\n",
"[ 2713.153531] [<ffffffff82d1b1d9>] foo+0x121/0x185\n",
},
// Needs symbolization, but symbolizer returns error.
{
"[ 2713.153531] [<ffffffff82d1b1d9>] foo+0x131/0x185\n",
"[ 2713.153531] [<ffffffff82d1b1d9>] foo+0x131/0x185\n",
},
// Needs symbolization, but symbol is missing.
{
"[ 2713.153531] [<ffffffff82d1b1d9>] bar+0x131/0x185\n",
"[ 2713.153531] [<ffffffff82d1b1d9>] bar+0x131/0x185\n",
},
// Bad offset.
{
"[ 2713.153531] [<ffffffff82d1b1d9>] bar+0xffffffffffffffffffff/0x185\n",
"[ 2713.153531] [<ffffffff82d1b1d9>] bar+0xffffffffffffffffffff/0x185\n",
},
// Should not be symbolized.
{
"WARNING: CPU: 2 PID: 2636 at ipc/shm.c:162 foo+0x101/0x185\n",
"WARNING: CPU: 2 PID: 2636 at ipc/shm.c:162 foo+0x101/0x185 foo.c:555\n",
},
// Tricky function name.
{
" [<ffffffff84e5bea0>] do_ipv6_setsockopt.isra.7.part.3+0x101/0x2830 \n",
" [<ffffffff84e5bea0>] do_ipv6_setsockopt.isra.7.part.3+0x101/0x2830 net.c:111 \n",
},
// Old KASAN frame format (with tab).
{
"[ 50.419727] baz+0x101/0x200\n",
"[ 50.419727] baz+0x101/0x200 baz.c:100\n",
},
// Inlined frames.
{
" [<ffffffff84e5bea0>] foo+0x141/0x185\n",
" [<ffffffff84e5bea0>] inlined1 net.c:111 [inline]\n" +
" [<ffffffff84e5bea0>] inlined2 mm.c:222 [inline]\n" +
" [<ffffffff84e5bea0>] foo+0x141/0x185 kasan.c:333\n",
},
// Several symbols with the same name.
{
"[<ffffffff82d1b1d9>] baz+0x101/0x200\n",
"[<ffffffff82d1b1d9>] baz+0x101/0x200 baz.c:100\n",
},
}
symbols := map[string][]symbolizer.Symbol{
"foo": []symbolizer.Symbol{
{Addr: 0x1000000, Size: 0x190},
},
"do_ipv6_setsockopt.isra.7.part.3": []symbolizer.Symbol{
{Addr: 0x2000000, Size: 0x2830},
},
"baz": []symbolizer.Symbol{
{Addr: 0x3000000, Size: 0x100},
{Addr: 0x4000000, Size: 0x200},
{Addr: 0x5000000, Size: 0x300},
},
}
symb := func(bin string, pc uint64) ([]symbolizer.Frame, error) {
if bin != "vmlinux" {
return nil, fmt.Errorf("unknown pc 0x%x", pc)
}
switch pc {
case 0x1000100:
return []symbolizer.Frame{
{
File: "/linux/foo.c",
Line: 555,
},
}, nil
case 0x1000110:
return []symbolizer.Frame{
{
File: "/linux/./foo.h",
Line: 111,
},
}, nil
case 0x1000120:
return nil, nil
case 0x1000130:
return nil, fmt.Errorf("unknown pc 0x%x", pc)
case 0x2000100:
return []symbolizer.Frame{
{
File: "/linux/net.c",
Line: 111,
},
}, nil
case 0x1000140:
return []symbolizer.Frame{
{
Func: "inlined1",
File: "/linux/net.c",
Line: 111,
Inline: true,
},
{
Func: "inlined2",
File: "/linux/mm.c",
Line: 222,
Inline: true,
},
{
Func: "noninlined3",
File: "/linux/kasan.c",
Line: 333,
Inline: false,
},
}, nil
case 0x4000100:
return []symbolizer.Frame{
{
File: "/linux/baz.c",
Line: 100,
},
}, nil
default:
return nil, fmt.Errorf("unknown pc 0x%x", pc)
}
}
for i, test := range tests {
t.Run(fmt.Sprint(i), func(t *testing.T) {
result := symbolizeLine(symb, symbols, "vmlinux", "/linux/", []byte(test.line))
if test.result != string(result) {
t.Errorf("want %q\n\t get %q", test.result, string(result))
}
})
}
}
|
