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
|
#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <time.h>
#include <unistd.h>
#include "liburing.h"
#include "helpers.h"
#include "../src/syscall.h"
static void sleep_ms(uint64_t ms)
{
usleep(ms * 1000);
}
static uint64_t current_time_ms(void)
{
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts))
exit(1);
return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}
static bool write_file(const char* file, const char* what, ...)
{
char buf[1024];
va_list args;
va_start(args, what);
vsnprintf(buf, sizeof(buf), what, args);
va_end(args);
buf[sizeof(buf) - 1] = 0;
int len = strlen(buf);
int fd = open(file, O_WRONLY | O_CLOEXEC);
if (fd == -1)
return false;
if (write(fd, buf, len) != len) {
int err = errno;
close(fd);
errno = err;
return false;
}
close(fd);
return true;
}
static void kill_and_wait(int pid, int* status)
{
kill(-pid, SIGKILL);
kill(pid, SIGKILL);
int i;
for (i = 0; i < 100; i++) {
if (waitpid(-1, status, WNOHANG | __WALL) == pid)
return;
usleep(1000);
}
DIR* dir = opendir("/sys/fs/fuse/connections");
if (dir) {
for (;;) {
struct dirent* ent = readdir(dir);
if (!ent)
break;
if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
continue;
char abort[300];
snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
ent->d_name);
int fd = open(abort, O_WRONLY);
if (fd == -1) {
continue;
}
if (write(fd, abort, 1) < 0) {
}
close(fd);
}
closedir(dir);
} else {
}
while (waitpid(-1, status, __WALL) != pid) {
}
}
static void setup_test(void)
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setpgrp();
write_file("/proc/self/oom_score_adj", "1000");
}
static void execute_one(void);
#define WAIT_FLAGS __WALL
static void loop(void)
{
int iter;
for (iter = 0; iter < 50; iter++) {
int pid = fork();
if (pid < 0)
exit(1);
if (pid == 0) {
setup_test();
execute_one();
exit(0);
}
int status = 0;
uint64_t start = current_time_ms();
for (;;) {
if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
break;
sleep_ms(1);
if (current_time_ms() - start < 5 * 1000)
continue;
kill_and_wait(pid, &status);
break;
}
}
}
void execute_one(void)
{
*(uint32_t*)0x20000080 = 0;
*(uint32_t*)0x20000084 = 0;
*(uint32_t*)0x20000088 = 3;
*(uint32_t*)0x2000008c = 3;
*(uint32_t*)0x20000090 = 0x175;
*(uint32_t*)0x20000094 = 0;
*(uint32_t*)0x20000098 = 0;
*(uint32_t*)0x2000009c = 0;
*(uint32_t*)0x200000a0 = 0;
*(uint32_t*)0x200000a4 = 0;
*(uint32_t*)0x200000a8 = 0;
*(uint32_t*)0x200000ac = 0;
*(uint32_t*)0x200000b0 = 0;
*(uint32_t*)0x200000b4 = 0;
*(uint32_t*)0x200000b8 = 0;
*(uint32_t*)0x200000bc = 0;
*(uint32_t*)0x200000c0 = 0;
*(uint32_t*)0x200000c4 = 0;
*(uint64_t*)0x200000c8 = 0;
*(uint32_t*)0x200000d0 = 0;
*(uint32_t*)0x200000d4 = 0;
*(uint32_t*)0x200000d8 = 0;
*(uint32_t*)0x200000dc = 0;
*(uint32_t*)0x200000e0 = 0;
*(uint32_t*)0x200000e4 = 0;
*(uint32_t*)0x200000e8 = 0;
*(uint32_t*)0x200000ec = 0;
*(uint64_t*)0x200000f0 = 0;
__sys_io_uring_setup(0x983, (struct io_uring_params *) 0x20000080);
}
static void sig_int(int sig)
{
exit(0);
}
int main(int argc, char *argv[])
{
if (argc > 1)
return T_EXIT_SKIP;
signal(SIGINT, sig_int);
mmap((void *) 0x20000000, 0x1000000, 3, MAP_ANON|MAP_PRIVATE, -1, 0);
loop();
return T_EXIT_PASS;
}
|
