// https://syzkaller.appspot.com/bug?id=7e9fcb0736aaac1fc071ddbbb213f82e9a99df01
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}

#include <setjmp.h>
#include <signal.h>
#include <stdint.h>
#include <string.h>
#include <string.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* uctx)
{
  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);
  }
  doexit(sig);
  for (;;) {
  }
}

static void install_segv_handler()
{
  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 uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static uintptr_t syz_open_procfs(uintptr_t a0, uintptr_t 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 == (uintptr_t)-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 test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("clone failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      test();
      doexit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid)
        break;
      usleep(1000);
      if (current_time_ms() - start > 5 * 1000) {
        kill(-pid, SIGKILL);
        kill(pid, SIGKILL);
        while (waitpid(-1, &status, __WALL) != pid) {
        }
        break;
      }
    }
  }
}

long r[65];
void* thr(void* arg)
{
  switch ((long)arg) {
  case 0:
    r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 1:
    NONFAILING(*(uint32_t*)0x2001d000 = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x2001d004 = (uint32_t)0x78);
    NONFAILING(*(uint8_t*)0x2001d008 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2001d009 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2001d00a = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2001d00b = (uint8_t)0x0);
    NONFAILING(*(uint32_t*)0x2001d00c = (uint32_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d010 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d018 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d020 = (uint64_t)0x0);
    NONFAILING(*(uint8_t*)0x2001d028 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2001d029 = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2001d02a = (uint8_t)0x0);
    NONFAILING(*(uint8_t*)0x2001d02b = (uint8_t)0x0);
    NONFAILING(*(uint32_t*)0x2001d02c = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x2001d030 = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x2001d034 = (uint32_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d038 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d040 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d048 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d050 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d058 = (uint64_t)0x10000);
    NONFAILING(*(uint32_t*)0x2001d060 = (uint32_t)0x0);
    NONFAILING(*(uint64_t*)0x2001d068 = (uint64_t)0x0);
    NONFAILING(*(uint32_t*)0x2001d070 = (uint32_t)0x0);
    NONFAILING(*(uint16_t*)0x2001d074 = (uint16_t)0x0);
    NONFAILING(*(uint16_t*)0x2001d076 = (uint16_t)0x0);
    r[28] = syscall(__NR_perf_event_open, 0x2001d000ul, 0x0ul, 0x0ul,
                    0xfffffffffffffffful, 0x8ul);
    break;
  case 2:
    r[29] = syscall(__NR_pread64, r[28], 0x20006000ul, 0x0ul, 0x0ul);
    break;
  case 3:
    r[30] = syscall(__NR_getpgid, 0x0ul);
    break;
  case 4:
    NONFAILING(*(uint32_t*)0x20617ffc = (uint32_t)0xffffffffffffff9c);
    r[32] = syscall(__NR_ioctl, 0xffffffffffffff9cul, 0x89e2ul,
                    0x20617ffcul);
    break;
  case 5:
    r[33] = syscall(__NR_socket, 0x2ul, 0x5ul, 0x84ul);
    break;
  case 6:
    NONFAILING(*(uint32_t*)0x204e1ff8 = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x204e1ffc = (uint32_t)0x4000000000000);
    NONFAILING(*(uint32_t*)0x209c7ffc = (uint32_t)0x8);
    r[37] = syscall(__NR_getsockopt, r[33], 0x84ul, 0x66ul,
                    0x204e1ff8ul, 0x209c7ffcul);
    break;
  case 7:
    NONFAILING(memcpy((void*)0x201c2000,
                      "\x2e\x2f\x66\x69\x6c\x65\x30\x00", 8));
    r[39] = syscall(__NR_mknod, 0x201c2000ul, 0x1040ul, 0x0ul);
    break;
  case 8:
    NONFAILING(memcpy((void*)0x20f8aff8,
                      "\x2e\x2f\x66\x69\x6c\x65\x30\x00", 8));
    NONFAILING(*(uint64_t*)0x20030000 = (uint64_t)0x2085bfa6);
    NONFAILING(*(uint64_t*)0x20030008 = (uint64_t)0x2015effa);
    NONFAILING(*(uint64_t*)0x20030010 = (uint64_t)0x20219ff4);
    NONFAILING(*(uint64_t*)0x20030018 = (uint64_t)0x204ea000);
    NONFAILING(*(uint64_t*)0x20030020 = (uint64_t)0x20e0aff0);
    NONFAILING(*(uint64_t*)0x20030028 = (uint64_t)0x2019f000);
    NONFAILING(*(uint64_t*)0x20030030 = (uint64_t)0x20d8c000);
    NONFAILING(*(uint64_t*)0x20030038 = (uint64_t)0x2072c000);
    NONFAILING(*(uint64_t*)0x20030040 = (uint64_t)0x20ffe000);
    NONFAILING(memcpy(
        (void*)0x2085bfa6,
        "\x75\x73\x65\x72\x5d\x2a\x6d\x69\x6d\x65\x5f\x74\x79\x70\x65"
        "\x6d\x64\x35\x73\x75\x6d\x7b\x5d\x74\x72\x75\x73\x74\x65\x64"
        "\x73\x65\x6c\x69\x6e\x75\x78\x16\x26\x75\x73\x65\x72\x73\x65"
        "\x63\x75\x72\x69\x74\x79\x2c\x24\x76\x62\x6f\x78\x6e\x65\x74"
        "\x31\x26\x2b\x5b\x47\x50\x4c\x76\x62\x6f\x78\x6e\x65\x74\x31"
        "\x6d\x64\x35\x73\x75\x6d\xcf\x65\x74\x68\x30\x47\x50\x4c\x00",
        90));
    NONFAILING(
        memcpy((void*)0x2015effa, "\x6c\x6f\x67\x6f\x6e\x00", 6));
    NONFAILING(
        memcpy((void*)0x20219ff4,
               "\x65\x6d\x31\x73\x65\x63\x75\x72\x69\x74\x79\x00", 12));
    NONFAILING(memcpy((void*)0x204ea000,
                      "\x63\x70\x75\x73\x65\x74\x7d\x25\x25\x00", 10));
    NONFAILING(memcpy((void*)0x20e0aff0, "\x2f\x64\x65\x76\x2f\x73\x65"
                                         "\x71\x75\x65\x6e\x63\x65\x72"
                                         "\x32\x00",
                      16));
    NONFAILING(memcpy((void*)0x2019f000, "\x21\x7b\x00", 3));
    NONFAILING(
        memcpy((void*)0x20d8c000, "\x65\x6d\x31\x5b\x2c\x00", 6));
    NONFAILING(memcpy((void*)0x2072c000,
                      "\x40\x73\x65\x63\x75\x72\x69\x74\x79\x2d\x00",
                      11));
    NONFAILING(memcpy((void*)0x20ffe000, "\x00", 1));
    r[59] =
        syscall(__NR_execve, 0x20f8aff8ul, 0x2089d000ul, 0x20030000ul);
    break;
  case 9:
    r[60] = syscall(__NR_pipe2, 0x20c42000ul, 0x0ul);
    if (r[60] != -1)
      NONFAILING(r[61] = *(uint32_t*)0x20c42004);
    break;
  case 10:
    NONFAILING(memcpy((void*)0x20e03ff8,
                      "\x73\x79\x73\x63\x61\x6c\x6c\x00", 8));
    r[63] = syz_open_procfs(0x0ul, 0x20e03ff8ul);
    break;
  case 11:
    r[64] = syscall(__NR_splice, r[63], 0x0ul, r[61], 0x0ul, 0xa3eaul,
                    0x0ul);
    break;
  }
  return 0;
}

void test()
{
  long i;
  pthread_t th[24];

  memset(r, -1, sizeof(r));
  for (i = 0; i < 12; i++) {
    pthread_create(&th[i], 0, thr, (void*)i);
    usleep(rand() % 10000);
  }
  usleep(rand() % 100000);
}

int main()
{
  int i;
  for (i = 0; i < 8; i++) {
    if (fork() == 0) {
      install_segv_handler();
      loop();
      return 0;
    }
  }
  sleep(1000000);
  return 0;
}