xref: /freebsd/tools/test/stress2/misc/syzkaller43.sh (revision 924226fba12cc9a228c73b956e1b7fa24c60b055)
1#!/bin/sh
2
3# panic: Assertion done != job_total_nbytes failed at ../../../kern/sys_socket.c:672
4# cpuid = 6
5# time = 1630912129
6# KDB: stack backtrace:
7# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e4f2fa10
8# vpanic() at vpanic+0x187/frame 0xfffffe00e4f2fa70
9# panic() at panic+0x43/frame 0xfffffe00e4f2fad0
10# soaio_process_sb() at soaio_process_sb+0x79a/frame 0xfffffe00e4f2fb70
11# soaio_kproc_loop() at soaio_kproc_loop+0x96/frame 0xfffffe00e4f2fbb0
12# fork_exit() at fork_exit+0x80/frame 0xfffffe00e4f2fbf0
13# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e4f2fbf0
14# --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
15# KDB: enter: panic
16# [ thread pid 26 tid 100163 ]
17# Stopped at      kdb_enter+0x37: movq    $0,0x127297e(%rip)
18# db> x/s version
19# version: FreeBSD 14.0-CURRENT #0 main-n249158-1f7a6325fe1b: Sun Sep  5 09:12:58 CEST 2021
20# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO
21# db>
22
23[ `uname -p` != "amd64" ] && exit 0
24[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
25
26. ../default.cfg
27cat > /tmp/syzkaller43.c <<EOF
28// https://syzkaller.appspot.com/bug?id=0ecbaedb9a54dd1af01c400dabe774e5c6c6fb6c
29// autogenerated by syzkaller (https://github.com/google/syzkaller)
30// Reported-by: syzbot+c7d22dbbb9aef509421d@syzkaller.appspotmail.com
31
32#define _GNU_SOURCE
33
34#include <sys/types.h>
35
36#include <errno.h>
37#include <pthread.h>
38#include <pwd.h>
39#include <signal.h>
40#include <stdarg.h>
41#include <stdbool.h>
42#include <stdint.h>
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46#include <sys/endian.h>
47#include <sys/syscall.h>
48#include <sys/wait.h>
49#include <time.h>
50#include <unistd.h>
51
52static void kill_and_wait(int pid, int* status)
53{
54  kill(pid, SIGKILL);
55  while (waitpid(-1, status, 0) != pid) {
56  }
57}
58
59static void sleep_ms(uint64_t ms)
60{
61  usleep(ms * 1000);
62}
63
64static uint64_t current_time_ms(void)
65{
66  struct timespec ts;
67  if (clock_gettime(CLOCK_MONOTONIC, &ts))
68    exit(1);
69  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
70}
71
72static void thread_start(void* (*fn)(void*), void* arg)
73{
74  pthread_t th;
75  pthread_attr_t attr;
76  pthread_attr_init(&attr);
77  pthread_attr_setstacksize(&attr, 128 << 10);
78  int i = 0;
79  for (; i < 100; i++) {
80    if (pthread_create(&th, &attr, fn, arg) == 0) {
81      pthread_attr_destroy(&attr);
82      return;
83    }
84    if (errno == EAGAIN) {
85      usleep(50);
86      continue;
87    }
88    break;
89  }
90  exit(1);
91}
92
93typedef struct {
94  pthread_mutex_t mu;
95  pthread_cond_t cv;
96  int state;
97} event_t;
98
99static void event_init(event_t* ev)
100{
101  if (pthread_mutex_init(&ev->mu, 0))
102    exit(1);
103  if (pthread_cond_init(&ev->cv, 0))
104    exit(1);
105  ev->state = 0;
106}
107
108static void event_reset(event_t* ev)
109{
110  ev->state = 0;
111}
112
113static void event_set(event_t* ev)
114{
115  pthread_mutex_lock(&ev->mu);
116  if (ev->state)
117    exit(1);
118  ev->state = 1;
119  pthread_mutex_unlock(&ev->mu);
120  pthread_cond_broadcast(&ev->cv);
121}
122
123static void event_wait(event_t* ev)
124{
125  pthread_mutex_lock(&ev->mu);
126  while (!ev->state)
127    pthread_cond_wait(&ev->cv, &ev->mu);
128  pthread_mutex_unlock(&ev->mu);
129}
130
131static int event_isset(event_t* ev)
132{
133  pthread_mutex_lock(&ev->mu);
134  int res = ev->state;
135  pthread_mutex_unlock(&ev->mu);
136  return res;
137}
138
139static int event_timedwait(event_t* ev, uint64_t timeout)
140{
141  uint64_t start = current_time_ms();
142  uint64_t now = start;
143  pthread_mutex_lock(&ev->mu);
144  for (;;) {
145    if (ev->state)
146      break;
147    uint64_t remain = timeout - (now - start);
148    struct timespec ts;
149    ts.tv_sec = remain / 1000;
150    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
151    pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
152    now = current_time_ms();
153    if (now - start > timeout)
154      break;
155  }
156  int res = ev->state;
157  pthread_mutex_unlock(&ev->mu);
158  return res;
159}
160
161struct thread_t {
162  int created, call;
163  event_t ready, done;
164};
165
166static struct thread_t threads[16];
167static void execute_call(int call);
168static int running;
169
170static void* thr(void* arg)
171{
172  struct thread_t* th = (struct thread_t*)arg;
173  for (;;) {
174    event_wait(&th->ready);
175    event_reset(&th->ready);
176    execute_call(th->call);
177    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
178    event_set(&th->done);
179  }
180  return 0;
181}
182
183static void execute_one(void)
184{
185  int i, call, thread;
186  for (call = 0; call < 5; call++) {
187    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
188         thread++) {
189      struct thread_t* th = &threads[thread];
190      if (!th->created) {
191        th->created = 1;
192        event_init(&th->ready);
193        event_init(&th->done);
194        event_set(&th->done);
195        thread_start(thr, th);
196      }
197      if (!event_isset(&th->done))
198        continue;
199      event_reset(&th->done);
200      th->call = call;
201      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
202      event_set(&th->ready);
203      event_timedwait(&th->done, 50);
204      break;
205    }
206  }
207  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
208    sleep_ms(1);
209}
210
211static void execute_one(void);
212
213#define WAIT_FLAGS 0
214
215static void loop(void)
216{
217  int iter = 0;
218  for (;; iter++) {
219    int pid = fork();
220    if (pid < 0)
221      exit(1);
222    if (pid == 0) {
223      execute_one();
224      exit(0);
225    }
226    int status = 0;
227    uint64_t start = current_time_ms();
228    for (;;) {
229      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
230        break;
231      sleep_ms(1);
232      if (current_time_ms() - start < 5000) {
233        continue;
234      }
235      kill_and_wait(pid, &status);
236      break;
237    }
238  }
239}
240
241#ifndef SYS_aio_readv
242#define SYS_aio_readv 579
243#endif
244
245uint64_t r[1] = {0xffffffffffffffff};
246
247void execute_call(int call)
248{
249  intptr_t res = 0;
250  switch (call) {
251  case 0:
252    res = syscall(SYS_socket, 0x1cul, 5ul, 0x84);
253    if (res != -1)
254      r[0] = res;
255    break;
256  case 1:
257    *(uint64_t*)0x20000440 = 0;
258    *(uint32_t*)0x20000448 = 0;
259    *(uint64_t*)0x20000450 = 0;
260    *(uint64_t*)0x20000458 = 0;
261    *(uint64_t*)0x20000460 = 0;
262    *(uint64_t*)0x20000468 = 0;
263    *(uint32_t*)0x20000470 = 0;
264    syscall(SYS_recvmsg, r[0], 0x20000440ul, 0x40040ul);
265    break;
266  case 2:
267    *(uint32_t*)0x200006c0 = r[0];
268    *(uint64_t*)0x200006c8 = 0x800;
269    *(uint64_t*)0x200006d0 = 0;
270    *(uint64_t*)0x200006d8 = 0;
271    *(uint32_t*)0x200006e0 = -1;
272    *(uint32_t*)0x200006e4 = 8;
273    *(uint64_t*)0x200006e8 = 0xffffffffffff658c;
274    *(uint32_t*)0x200006f0 = 4;
275    *(uint32_t*)0x200006f4 = 0x1ff;
276    *(uint64_t*)0x200006f8 = 0x40;
277    *(uint64_t*)0x20000700 = 0;
278    *(uint64_t*)0x20000708 = 0;
279    *(uint32_t*)0x20000710 = 4;
280    *(uint32_t*)0x20000714 = 8;
281    *(uint32_t*)0x20000718 = 6;
282    *(uint64_t*)0x20000720 = 0;
283    *(uint64_t*)0x20000728 = 0;
284    syscall(SYS_aio_readv, 0x200006c0ul);
285    break;
286  case 3:
287    *(uint32_t*)0x20000140 = 0;
288    *(uint16_t*)0x20000144 = 4;
289    *(uint8_t*)0x20000146 = 1;
290    syscall(SYS_setsockopt, r[0], 0x84, 0x1e, 0x20000140ul, 8ul);
291    break;
292  case 4:
293    *(uint64_t*)0x20000580 = 0x20000080;
294    *(uint8_t*)0x20000080 = 0x1c;
295    *(uint8_t*)0x20000081 = 0x1c;
296    *(uint16_t*)0x20000082 = htobe16(0x4e22);
297    *(uint32_t*)0x20000084 = 0;
298    *(uint64_t*)0x20000088 = htobe64(0);
299    *(uint64_t*)0x20000090 = htobe64(1);
300    *(uint32_t*)0x20000098 = 0;
301    *(uint32_t*)0x20000588 = 0x1c;
302    *(uint64_t*)0x20000590 = 0x20000400;
303    *(uint64_t*)0x20000400 = 0x200000c0;
304    memset((void*)0x200000c0, 239, 1);
305    *(uint64_t*)0x20000408 = 1;
306    *(uint32_t*)0x20000598 = 1;
307    *(uint64_t*)0x200005a0 = 0;
308    *(uint32_t*)0x200005a8 = 0xd0;
309    *(uint32_t*)0x200005ac = 0;
310    syscall(SYS_sendmsg, r[0], 0x20000580ul, 0ul);
311    break;
312  }
313}
314int main(void)
315{
316  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
317  loop();
318  return 0;
319}
320EOF
321mycc -o /tmp/syzkaller43 -Wall -Wextra -O0 /tmp/syzkaller43.c -lpthread ||
322    exit 1
323
324(cd /tmp; timeout 3m ./syzkaller43)
325
326rm -rf /tmp/syzkaller43 /tmp/syzkaller43.c /tmp/syzkaller.*
327exit 0
328