// https://syzkaller.appspot.com/bug?id=e2dc9aea0465d1eea101bb24cb463e2a7efe7d17
// 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 <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);
}

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 test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("loop fork 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[2];
void test()
{
  memset(r, -1, sizeof(r));
  syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0);
  r[0] = syscall(__NR_socket, 0x26, 5, 0);
  NONFAILING(*(uint16_t*)0x20f74000 = 0x26);
  NONFAILING(memcpy((void*)0x20f74002,
                    "\x73\x6b\x63\x69\x70\x68\x65\x72\x00\x00\x00\x00\x00\x00",
                    14));
  NONFAILING(*(uint32_t*)0x20f74010 = 0);
  NONFAILING(*(uint32_t*)0x20f74014 = 0);
  NONFAILING(memcpy((void*)0x20f74018,
                    "\x6c\x72\x77\x28\x74\x77\x6f\x66\x69\x73\x68\x29\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",
                    64));
  syscall(__NR_bind, r[0], 0x20f74000, 0x58);
  NONFAILING(memcpy((void*)0x20e24000, "\xb7\x0a\x75\xb0\xd5\xe3\x83\xe5\xb3"
                                       "\xb6\x0c\xed\x5c\x54\xdb\x0a\x29\x5d"
                                       "\xf0\xdf\x82\x17\xad\x40\x00\x00\x00"
                                       "\x00\x00\x00\x00\xe6",
                    32));
  syscall(__NR_setsockopt, r[0], 0x117, 1, 0x20e24000, 0x20);
  r[1] = syscall(__NR_accept, r[0], 0, 0);
  NONFAILING(*(uint64_t*)0x201b1e08 = 0);
  NONFAILING(*(uint32_t*)0x201b1e10 = 0);
  NONFAILING(*(uint64_t*)0x201b1e18 = 0x201c8ff0);
  NONFAILING(*(uint64_t*)0x201b1e20 = 1);
  NONFAILING(*(uint64_t*)0x201b1e28 = 0x20dd7000);
  NONFAILING(*(uint64_t*)0x201b1e30 = 0);
  NONFAILING(*(uint32_t*)0x201b1e38 = 0);
  NONFAILING(*(uint64_t*)0x201c8ff0 = 0x20a2ff02);
  NONFAILING(*(uint64_t*)0x201c8ff8 = 0x60);
  NONFAILING(memcpy((void*)0x20a2ff02,
                    "\x14\x5f\x94\x29\x0d\x94\xfd\x60\xbe\x6f\x39\xcb\x35\xfb"
                    "\x21\x81\xb7\xc8\xa1\x88\xbd\x63\x34\x96\xb7\x4a\x97\x61"
                    "\x9d\x22\x16\x2b\x60\xf5\xbf\xee\x3d\x01\x13\xb9\xf4\xa0"
                    "\x2b\xdc\xd5\xfc\x3b\x4c\xa5\x2e\xfd\x30\x93\x71\x5e\xda"
                    "\xce\x21\xb8\xde\x6d\xb9\xac\xdf\x79\xde\xc5\x1e\xc4\x52"
                    "\x6a\x77\xc0\x04\xc9\x9f\x05\x81\x16\x33\x53\x28\xb5\xca"
                    "\xaa\x5e\xa0\x59\x9a\x94\xe2\x40\xe6\xe2\x88\x9c",
                    96));
  syscall(__NR_sendmmsg, r[1], 0x201b1e08, 1, 0);
  NONFAILING(*(uint64_t*)0x206e3000 = 0x20f76000);
  NONFAILING(*(uint32_t*)0x206e3008 = 0x80);
  NONFAILING(*(uint64_t*)0x206e3010 = 0x20f7ffd0);
  NONFAILING(*(uint64_t*)0x206e3018 = 1);
  NONFAILING(*(uint64_t*)0x206e3020 = 0x20f76f1d);
  NONFAILING(*(uint64_t*)0x206e3028 = 0);
  NONFAILING(*(uint32_t*)0x206e3030 = 0);
  NONFAILING(*(uint64_t*)0x20f7ffd0 = 0x20295000);
  NONFAILING(*(uint64_t*)0x20f7ffd8 = 0x1000);
  syscall(__NR_recvmsg, r[1], 0x206e3000, 0);
}

int main()
{
  install_segv_handler();
  for (;;) {
    loop();
  }
}