// https://syzkaller.appspot.com/bug?id=286166aa4744abfe4a5d2b5f6eb4796575004992
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <setjmp.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>

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_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  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 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);
  if (pthread_create(&th, &attr, fn, arg))
    exit(1);
  pthread_attr_destroy(&attr);
}

typedef struct {
  int state;
} event_t;

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

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

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

static long syz_open_procfs(long a0, long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    NONFAILING(snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1));
  } else if (a0 == -1) {
    NONFAILING(snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1));
  } else {
    NONFAILING(snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0,
                        (char*)a1));
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  return fd;
}

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) {
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

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;
  for (call = 0; call < 50; 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);
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      reset_test();
      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 __NR_bpf
#define __NR_bpf 321
#endif
#ifndef __NR_pkey_alloc
#define __NR_pkey_alloc 330
#endif
#ifndef __NR_pkey_mprotect
#define __NR_pkey_mprotect 329
#endif

uint64_t r[8] = {0xffffffffffffffff, 0x0,
                 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    syscall(__NR_creat, 0, 0);
    break;
  case 1:
    syscall(__NR_write, -1, 0, 0);
    break;
  case 2:
    syscall(__NR_ptrace, 0x1f, 0, 0, 0);
    break;
  case 3:
    syscall(__NR_ptrace, 0xd, 0, 0, 0);
    break;
  case 4:
    syscall(__NR_ptrace, 7, 0, 0, 0);
    break;
  case 5:
    syscall(__NR_openat, 0xffffffffffffff9c, 0, 0x24000, 0);
    break;
  case 6:
    syscall(__NR_sendto, -1, 0, 0, 0x800, 0, 0);
    break;
  case 7:
    res = syscall(__NR_socket, 2, 2, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 8:
    res = syscall(__NR_getpid);
    if (res != -1)
      r[1] = res;
    break;
  case 9:
    NONFAILING(*(uint32_t*)0x20000200 = 0);
    syscall(__NR_sched_setscheduler, r[1], 5, 0x20000200);
    break;
  case 10:
    NONFAILING(memcpy((void*)0x20000a40,
                      "\x45\xbf\x4d\x72\x61\x77\x00\x00\x00\x00\x00\x00\x00\x00"
                      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                      "\x00\x00\x00\x00\x00\x00\x00\x09\x00\x00\x00\x03\x00\x00"
                      "\x00\xd0\x02\x00\x00\x00\x00\x00\x00\x10\x01\x00\x00\x10"
                      "\x01\x00\x00\x00\x00\x00\x00\x10\x01\x00\x00\x38\x02\x00"
                      "\x00\x38\x02\x00\x00\x38\x02\x00\x00\x38\x02\x00\x00\x38"
                      "\x02\x00\x00\x03\x00\x00\x00",
                      91));
    NONFAILING(*(uint64_t*)0x20000a9b = 0);
    syscall(__NR_setsockopt, r[0], 0, 0x40, 0x20000a40, 3);
    break;
  case 11:
    syscall(__NR_setsockopt, -1, 0x107, 8, 0, 0);
    break;
  case 12:
    syscall(__NR_socketpair, 8, 6, 3, 0);
    break;
  case 13:
    res = syscall(__NR_socket, 0xa, 1, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 14:
    syscall(__NR_bind, r[2], 0, 0);
    break;
  case 15:
    syscall(__NR_socket, 0xa, 1, 0);
    break;
  case 16:
    syscall(__NR_getgroups, 0, 0);
    break;
  case 17:
    NONFAILING(memcpy((void*)0x20000100, "/dev/uinput\x00", 12));
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 0x805, 0);
    if (res != -1)
      r[3] = res;
    break;
  case 18:
    NONFAILING(*(uint16_t*)0x20000300 = 0);
    NONFAILING(*(uint16_t*)0x20000302 = 0);
    NONFAILING(*(uint16_t*)0x20000304 = 0);
    NONFAILING(*(uint16_t*)0x20000306 = 0);
    NONFAILING(memcpy((void*)0x20000308,
                      "syz1\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                      "\x00\x00\x00\x00\x00\x00\x00",
                      80));
    NONFAILING(*(uint32_t*)0x20000358 = 0);
    syscall(__NR_ioctl, r[3], 0x5501, 0x20000300);
    break;
  case 19:
    syscall(__NR_write, r[3], 0, 0);
    break;
  case 20:
    syscall(__NR_ioctl, -1, 0x8912, 0);
    break;
  case 21:
    syscall(__NR_accept4, r[2], 0, 0, 0);
    break;
  case 22:
    syscall(__NR_socket, 0xa, 1, 5);
    break;
  case 23:
    res = syscall(__NR_socket, 2, 0x4000000000000001, 0);
    if (res != -1)
      r[4] = res;
    break;
  case 24:
    syscall(__NR_setsockopt, r[4], 1, 0x1a, 0, 0);
    break;
  case 25:
    syscall(__NR_pwritev, -1, 0, 0, 0x81003);
    break;
  case 26:
    syscall(__NR_write, -1, 0, 0);
    break;
  case 27:
    syscall(__NR_write, -1, 0, 0);
    break;
  case 28:
    syscall(__NR_sendfile, -1, -1, 0, 0x80003);
    break;
  case 29:
    res = syz_open_procfs(0, 0);
    if (res != -1)
      r[5] = res;
    break;
  case 30:
    syscall(__NR_ioctl, r[5], 0x8940, 0);
    break;
  case 31:
    syscall(__NR_bpf, 0x14, 0, 0);
    break;
  case 32:
    NONFAILING(*(uint32_t*)0x200000c0 = 7);
    syscall(__NR_sched_setscheduler, 0, 2, 0x200000c0);
    break;
  case 33:
    syscall(__NR_openat, -1, 0, 0, 0);
    break;
  case 34:
    syscall(__NR_flistxattr, -1, 0, 0);
    break;
  case 35:
    syscall(__NR_mlock, 0x20001000, 0x4000);
    break;
  case 36:
    res = syscall(__NR_pkey_alloc, 0, 2);
    if (res != -1)
      r[6] = res;
    break;
  case 37:
    syscall(__NR_pkey_mprotect, 0x20001000, 0x2000, 3, r[6]);
    break;
  case 38:
    syscall(__NR_clone, 0x2102001ffe, 0, 0x9999999999999999, 0, -1);
    break;
  case 39:
    syscall(__NR_ioctl, -1, 0x5473, 0);
    break;
  case 40:
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0, 0x121880, 0);
    if (res != -1)
      r[7] = res;
    break;
  case 41:
    syscall(__NR_ioctl, r[7], 0x401845ef, 0);
    break;
  case 42:
    syscall(__NR_ptrace, 0xe, 0, 0, 0x20001280);
    break;
  case 43:
    syscall(__NR_setsockopt, -1, 0, 0x484, 0, 0);
    break;
  case 44:
    syscall(__NR_ioctl, -1, 0x80247009, 0);
    break;
  case 45:
    NONFAILING(memcpy((void*)0x20000800, "HL\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                                         "\x00",
                      29));
    NONFAILING(*(uint8_t*)0x2000081d = 0);
    NONFAILING(*(uint32_t*)0x20000840 = 0x1e);
    syscall(__NR_getsockopt, -1, 0x29, 0x45, 0x20000800, 0x20000840);
    break;
  case 46:
    syscall(__NR_sendmsg, -1, 0, 0);
    break;
  case 47:
    syscall(__NR_setsockopt, -1, 0, 0x487, 0, 0);
    break;
  case 48:
    syscall(__NR_ioctl, -1, 0xc020660b, 0x20000040);
    break;
  case 49:
    syscall(__NR_socket, 0xf, 3, 2);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  install_segv_handler();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}