// https://syzkaller.appspot.com/bug?id=bf3c4c53a63e7abdf247c9a8b94fd26f75e5b513
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <pthread.h>
#include <pwd.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/resource.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

static unsigned long long procid;

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
      (addr < prog_start || addr > prog_end)) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  {                                                                            \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    }                                                                          \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
  }

static void kill_and_wait(int pid, int* status)
{
  kill(pid, SIGKILL);
  while (waitpid(-1, status, 0) != pid) {
  }
}

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 void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i;
  for (i = 0; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  pthread_mutex_t mu;
  pthread_cond_t cv;
  int state;
} event_t;

static void event_init(event_t* ev)
{
  if (pthread_mutex_init(&ev->mu, 0))
    exit(1);
  if (pthread_cond_init(&ev->cv, 0))
    exit(1);
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  if (ev->state)
    exit(1);
  ev->state = 1;
  pthread_mutex_unlock(&ev->mu);
  pthread_cond_broadcast(&ev->cv);
}

static void event_wait(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  while (!ev->state)
    pthread_cond_wait(&ev->cv, &ev->mu);
  pthread_mutex_unlock(&ev->mu);
}

static int event_isset(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  int res = ev->state;
  pthread_mutex_unlock(&ev->mu);
  return res;
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  pthread_mutex_lock(&ev->mu);
  for (;;) {
    if (ev->state)
      break;
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
    now = current_time_ms();
    if (now - start > timeout)
      break;
  }
  int res = ev->state;
  pthread_mutex_unlock(&ev->mu);
  return res;
}

static void sandbox_common()
{
  if (setsid() == -1)
    exit(1);
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
}

static void loop();

static int do_sandbox_none(void)
{
  sandbox_common();
  loop();
  return 0;
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  int i, call, thread;
  int collide = 0;
again:
  for (call = 0; call < 8; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (collide && (call % 2) == 0)
        break;
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  if (!collide) {
    collide = 1;
    goto again;
  }
}

static void execute_one(void);

#define WAIT_FLAGS 0

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      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;
    }
  }
}

#ifndef SYS_mlockall
#define SYS_mlockall 242
#endif
#ifndef SYS_mmap
#define SYS_mmap 197
#endif
#ifndef SYS_open
#define SYS_open 5
#endif
#ifndef SYS_socket
#define SYS_socket 394
#endif
#ifndef SYS_writev
#define SYS_writev 121
#endif

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    syscall(SYS_mlockall, 3ul);
    break;
  case 1:
    NONFAILING(memcpy((void*)0x20000040, "./file0\000", 8));
    res = syscall(SYS_open, 0x20000040ul, 0x615ul, 0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    NONFAILING(memcpy((void*)0x20000100, "./file0\000", 8));
    res = syscall(SYS_open, 0x20000100ul, 0x40000400000002c2ul, 0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    syscall(SYS_socket, 0ul, 0ul, 0);
    break;
  case 4:
    NONFAILING(*(uint64_t*)0x20000340 = 0x20000180);
    NONFAILING(*(uint64_t*)0x20000348 = 0x81700);
    syscall(SYS_writev, r[1], 0x20000340ul, 0x1000000000000013ul);
    break;
  case 5:
    syscall(SYS_mmap, 0x20000000ul, 0x3000ul, 2ul, 0x11ul, r[0], 0ul, 0ul);
    break;
  case 6:
    NONFAILING(memcpy((void*)0x20000100, "./file0\000", 8));
    res = syscall(SYS_open, 0x20000100ul, 0x40000400000002c2ul, 0ul);
    if (res != -1)
      r[2] = res;
    break;
  case 7:
    NONFAILING(*(uint64_t*)0x20000640 = 0);
    NONFAILING(*(uint64_t*)0x20000648 = 0);
    NONFAILING(*(uint64_t*)0x20000650 = 0);
    NONFAILING(*(uint64_t*)0x20000658 = 0);
    NONFAILING(*(uint64_t*)0x20000660 = 0x20000200);
    NONFAILING(memcpy(
        (void*)0x20000200,
        "\x96\x39\x58\x2f\x8d\xca\x02\xc5\x51\x32\x6f\xdb\xfe\xbf\x28\x92\x69"
        "\x4d\x6d\x01\x83\x4e\x6e\x90\x5d\x56\xec\x43\xd6\x60\xd1\x36\x0c\x7c"
        "\x4c\xc1\xf9\x80\x6d\xdb\x0d\xd7\x09\xf5\xc7\x48\xfe\xf7\xc8\x56\xec"
        "\xe9\xa0\x99\x12\x23\x44\xf1\x7a\xc6\xee\x99\x56\xaa\x35\x37\x26\xe5"
        "\x10\xad\xd8\x49\x5c\xc4\x81\x15\xab\xdf\x19\x03\x68\xb9\x4b\x63\x28"
        "\x2a\x24\xb9\xa1\x69\x6a\x26\x65\xde\x0b\xe8\x63\x41\x35\x7d\xc7\x15"
        "\x47\xe5\x13\x6a\x44\x0b\x93\x8f\x50\x0b\xa3\xc6\xff\x0e\x2a\xd5\x84"
        "\xa9\x13\x36\x40\xca\xef\xef\x48\xac\x32\x0b\x0c\x04\x77\x73\x3b\xcc"
        "\x06\x78\x70\x31\x9c\x8a\x89\xaa\x6f\x15\xb4\xb6\xcc\xbf\x15\x1a\x37"
        "\x5a\xa4\x3b\x0b\x7a\xa2\x78\x90\x73\x21\x32\xd9\x9a\x67\x73\xa2\xe1"
        "\x33\x23\xf4\x49\x41\x27\x54\x7b\x97\x97\x10\x88\xa1\x23\xb0\x54\x90"
        "\x99\x86\x59\xfd\x29\x8d\xb4\x4e\x47\x8b\x44\x72\xa2\x9e\x4a\x15\xbc"
        "\xdd\x62\x9b\xff\x4c\x88\x85\x57\x73\xd3\x4c\x94\x17\x59\x56\xd5\xca"
        "\xae\x12\x76\xaa",
        225));
    NONFAILING(*(uint64_t*)0x20000668 = 0xe1);
    NONFAILING(*(uint64_t*)0x20000670 = 0);
    NONFAILING(*(uint64_t*)0x20000678 = 0);
    NONFAILING(*(uint64_t*)0x20000680 = 0);
    NONFAILING(*(uint64_t*)0x20000688 = 0);
    NONFAILING(*(uint64_t*)0x20000690 = 0x20000440);
    NONFAILING(memcpy(
        (void*)0x20000440,
        "\x44\x06\x5d\x89\x91\x87\xdd\xf5\x21\x6f\x8e\x1e\x26\xab\xa5\x47\xba"
        "\x22\x6c\x6c\xe5\x23\x14\x80\x11\xf5\x65\x67\xce\x9f\x48\xd7\xa1\x4c"
        "\x01\xdb\xda\xbd\x15\xa5\x4e\x46\xb0\x41\xa3\xa3\xfa\x32\xd6\x8a\xa3"
        "\x44\x9a\xc0\x9f\xe3\x93\x11\x72\x59\x66\x31\xc0\xe5\x91\xae\x9e\xb8"
        "\x4c\x3e\x0d\x8c\x43\x34\xc7\xff\x22\xf3\x0f\x90\xa1\x37\x87\xdd\xbe"
        "\x23\x7b\xb9\x66\x22\x7e\xe4\x3c\x55\x24\x5d\x83\x4c\xeb\x56\x3c\x69"
        "\x74\x9a\xe5\x0e\xca\xa6\x46\x2a\xc6\xae\x45\xae\xe3\xb7\x99\x3f\x19"
        "\xa5\x37\x16\x22\xe9\xb8\x18\x0d\x5a\x18\x4e\x40\x8c\xf2\x91\xa9\xad"
        "\x59\xf3\x2c\x65\xec\x61\x85\x90\x7d\xdc\x72\x70\x5b\x41\x86\xa7\xb9"
        "\xdf\xf9\x11\x2f\x96\x2a\x3d\x2a\xbe\x18\xc0\x5d\xb5\xe4\xa7\xfb\xb4"
        "\x20\x7f\xc2\x6e\x54\xc9\x92\xb4\xb9\x72\x9b\x52\x74\xbf\x39\xfa\x23"
        "\x65\x99\x39\xa9\x53\x88\x01\x2d\x39\xd3\xd6\xb7\xd4\x45\x6a\x12\xcf"
        "\xda\x8b\x9b\x96\xe0\xe9\x33\xdd\x1f\xed\x05\x4a\x05\x07",
        218));
    NONFAILING(*(uint64_t*)0x20000698 = 0xda);
    NONFAILING(*(uint64_t*)0x200006a0 = 0x200000c0);
    NONFAILING(*(uint64_t*)0x200006a8 = 0);
    NONFAILING(*(uint64_t*)0x200006b0 = 0);
    NONFAILING(*(uint64_t*)0x200006b8 = 0);
    NONFAILING(*(uint64_t*)0x200006c0 = 0);
    NONFAILING(*(uint64_t*)0x200006c8 = 0);
    NONFAILING(*(uint64_t*)0x200006d0 = 0x20000740);
    NONFAILING(memcpy(
        (void*)0x20000740,
        "\x12\xe2\x26\x0a\x83\x61\x2d\xbb\x5a\x55\xb0\x3d\xb8\x88\x6b\x64\xbe"
        "\xc3\x9b\xf5\x26\xce\xbe\xa8\x98\x82\x34\x4a\xb1\x72\x9d\x47\x36\xe0"
        "\x5b\x05\x76\x5c\x56\xa1\x1f\xa8\x62\x3e\x56\xbc\xbc\xb4\x82\xb6\x5e"
        "\x94\x17\xe2\x3e\x61\xa3\x91\xb7\x4c\x83\xc4\x1f\x0e\x0d\x81\xc9\xa7"
        "\xb9\xd9\x0e\x1a\x94\xfa\xfc\x1f\xf2\xe2\xfc\x76\xd7\x19\xa1\x77\xc3"
        "\xe9\x82\xe6\xd6\x73\x32\x79\xd6\x27\x58\xc5\x4a\xf0\x0e\xf9\xc9\x2f"
        "\x8f\x13\xa4\xbe\xb5\x9b\x99\x28\x59\xc5\x3a\x1d\xf6\xaf\x2d\xac\xd4"
        "\x4c\xad\x8e\xd6\x3d\x53\x72\x29\x07\x8d\x09\xa8\x89\xba\x7f\x5d\xa6"
        "\xc2\xd3\x17\x36\x8b\x5a\x46\x67\xf6\x5f\xb9\xd3\xfd\x3b\xac\x6c\x10"
        "\x22\xea\x8d\x3d\xac\x7a\x17\xf2\xb8\xba\x27\x73\x75",
        166));
    NONFAILING(*(uint64_t*)0x200006d8 = 0xa6);
    NONFAILING(*(uint64_t*)0x200006e0 = 0x20000300);
    NONFAILING(memcpy((void*)0x20000300, "\xc4\xd7\x43\x81\x50\x21\x26\x9c\xec"
                                         "\x91\x80\x95\x69\x51\xf3\x3f\x47\x3a"
                                         "\xa8\x9a\x33\x23\x8e\xd5\x2e\x5e\x3d"
                                         "\xcd\xe7\x9f\x99\x37\xb6\xd3\xd3\x63"
                                         "\xa4\xa7\xd5\xe6\x72\x74\xf1\xaa",
                      44));
    NONFAILING(*(uint64_t*)0x200006e8 = 0x2c);
    NONFAILING(*(uint64_t*)0x200006f0 = 0x20000540);
    NONFAILING(memcpy(
        (void*)0x20000540,
        "\xb9\xf9\x1a\xf7\x6a\xa9\xa6\xf5\x28\x9f\xe5\x95\x61\x92\xea\x1f\xb8"
        "\x34\x79\xac\xbf\xcd\x29\x93\x97\x3a\x81\x6a\xa5\xd7\xe4\xd9\x4a\x1f"
        "\x02\x75\x32\x75\x8f\x5f\x79\x4c\xe1\x36\x13\x9b\xc9\xe5\xd5\x19\x8b"
        "\xfb\xe7\x55\x9a\xe9\x95\x21\xb8\xa1\xf3\x65\x1a\x7d\x82\x3f\x9e\x30"
        "\x8f\x87\x14\xf7\xa2\xc7\x08\x40\x47\xd6\x76\x2a\x12\x11\x26\xec\x47"
        "\x89\x74\x10\x08\x60\x16\x52\x19\x36\x64\xca\xf2\x72\xfb\x5d\xc1\x88"
        "\xca\xb8\x33\xb0\xc1\x05\x7d\x80\xaf\x2e\x32\x41\xd9\x7e\x1b\x8b\x54"
        "\x6f\x18\x01\x70\xd9\xaf\x12\x4a\x6a\x42\xea\xe4\x3d\x6a\x8a\x95\x94"
        "\x28\xc8\xf0\x65\x28\x74\x4e\xc9\x59\xc5\x69\x3f\x8c\x29\xaf\x8f\x0a"
        "\x91\x5c\xb5\xbb\x53\x73\x17\xfa\x06\x9a\x53\xee\xfd\xd4\x76\x1b\xa3"
        "\x7c\x13\x73\x5d\xad\x09\x8c\x78\xa5\x8f\x50\x15\xd1\x48\x2a\xbc\xa8"
        "\xb3\xc2\x54\xf6\x70\xda\xcc\x25\x84\xc6\x59\xf5\xe4\xce\x85\x6a\x0a"
        "\xea\x31\xfc\xca\x13\x2d\x63\x5e\xd2\xe2\x13\x4a\x88\x6b\xf1\xd5\x86"
        "\x39\xf9\x4e\x35\xd7\xfd\x77",
        228));
    NONFAILING(*(uint64_t*)0x200006f8 = 0xe4);
    syscall(SYS_writev, r[2], 0x20000640ul, 0xcul);
    break;
  }
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
  install_segv_handler();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}