// https://syzkaller.appspot.com/bug?id=f0b9cf92da3e2950bc94bc88c774b3858647db6f
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/prctl.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 <errno.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.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);
}

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 void execute_one();
extern unsigned long long procid;

static 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();
      execute_one();
      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 < 3 * 1000)
        continue;
      kill(-pid, SIGKILL);
      kill(pid, SIGKILL);
      while (waitpid(-1, &status, __WALL) != pid) {
      }
      break;
    }
  }
}

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
unsigned long long procid;
void execute_one()
{
  long res = 0;
  res = syscall(__NR_socketpair, 0, 0, 0, 0x20000140);
  if (res != -1)
    NONFAILING(r[0] = *(uint32_t*)0x20000144);
  syscall(__NR_socket, 0xa, 1, 0);
  NONFAILING(*(uint32_t*)0x20000280 = 0x12);
  NONFAILING(*(uint32_t*)0x20000284 = 0xa);
  NONFAILING(*(uint32_t*)0x20000288 = 4);
  NONFAILING(*(uint32_t*)0x2000028c = 7);
  NONFAILING(*(uint32_t*)0x20000290 = 0);
  NONFAILING(*(uint32_t*)0x20000294 = 1);
  NONFAILING(*(uint32_t*)0x20000298 = 0);
  NONFAILING(*(uint8_t*)0x2000029c = 0);
  NONFAILING(*(uint8_t*)0x2000029d = 0);
  NONFAILING(*(uint8_t*)0x2000029e = 0);
  NONFAILING(*(uint8_t*)0x2000029f = 0);
  NONFAILING(*(uint8_t*)0x200002a0 = 0);
  NONFAILING(*(uint8_t*)0x200002a1 = 0);
  NONFAILING(*(uint8_t*)0x200002a2 = 0);
  NONFAILING(*(uint8_t*)0x200002a3 = 0);
  NONFAILING(*(uint8_t*)0x200002a4 = 0);
  NONFAILING(*(uint8_t*)0x200002a5 = 0);
  NONFAILING(*(uint8_t*)0x200002a6 = 0);
  NONFAILING(*(uint8_t*)0x200002a7 = 0);
  NONFAILING(*(uint8_t*)0x200002a8 = 0);
  NONFAILING(*(uint8_t*)0x200002a9 = 0);
  NONFAILING(*(uint8_t*)0x200002aa = 0);
  NONFAILING(*(uint8_t*)0x200002ab = 0);
  res = syscall(__NR_bpf, 0, 0x20000280, 0x2c);
  if (res != -1)
    r[1] = res;
  NONFAILING(*(uint32_t*)0x20000180 = r[1]);
  NONFAILING(*(uint64_t*)0x20000188 = 0x20000000);
  NONFAILING(*(uint64_t*)0x20000190 = 0x20000140);
  NONFAILING(*(uint64_t*)0x20000198 = 0);
  syscall(__NR_bpf, 2, 0x20000180, 0x20);
  NONFAILING(*(uint32_t*)0x20000000 = 5);
  NONFAILING(*(uint32_t*)0x20000004 = 0);
  NONFAILING(*(uint32_t*)0x20000008 = 0);
  NONFAILING(*(uint32_t*)0x2000000c = 0);
  NONFAILING(*(uint32_t*)0x20000010 = 0);
  NONFAILING(*(uint32_t*)0x20000014 = 0);
  NONFAILING(*(uint32_t*)0x20000018 = 0);
  syscall(__NR_ioctl, r[0], 0xc008240a, 0x20000000);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      install_segv_handler();
      for (;;) {
        loop();
      }
    }
  }
  sleep(1000000);
  return 0;
}