// https://syzkaller.appspot.com/bug?id=a7a41a7f641844dd94c17c63f0d9ccf68884083a
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.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/syscall.h>
#include <unistd.h>

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);                       \
  }

#define __syscall syscall

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

int main(void)
{
  syscall(SYS_mmap, 0x20000000, 0x1000000, 3, 0x1012, -1, 0, 0);
  install_segv_handler();
  intptr_t res = 0;
  NONFAILING(*(uint32_t*)0x20000000 = 0);
  NONFAILING(*(uint32_t*)0x20000004 = 0);
  NONFAILING(*(uint64_t*)0x20000008 = 0);
  NONFAILING(*(uint64_t*)0x20000010 = 3);
  syscall(SYS_ioctl, -1, 0x80185760, 0x20000000);
  res = syscall(SYS_socket, 0x18, 1, 0);
  if (res != -1)
    r[0] = res;
  NONFAILING(*(uint32_t*)0x200000c0 = 0);
  NONFAILING(*(uint32_t*)0x200000c4 = 0);
  NONFAILING(*(uint32_t*)0x200000c8 = 0x1ff);
  NONFAILING(*(uint32_t*)0x200000cc = 0);
  NONFAILING(memcpy((void*)0x200000d0,
                    "\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x20\x00\x00\x00"
                    "\x00\x00\x00\x00\x00\x00",
                    20));
  NONFAILING(*(uint32_t*)0x200000e4 = 0);
  NONFAILING(*(uint32_t*)0x200000e8 = 0);
  syscall(SYS_ioctl, -1, 0x802c7414, 0x200000c0);
  NONFAILING(*(uint16_t*)0x200000c0 = 0x18e6);
  NONFAILING(*(uint8_t*)0x200000c2 = 7);
  NONFAILING(*(uint32_t*)0x200000c4 = 0);
  syscall(SYS_connect, -1, 0x200000c0, 0x1c);
  syscall(SYS_close, r[0]);
  res = syscall(SYS_socket, 0x18, 3, 0);
  if (res != -1)
    r[1] = res;
  res = syscall(SYS_socket, 0x18, 3, 0);
  if (res != -1)
    r[2] = res;
  NONFAILING(memcpy((void*)0x20000040, "\xd5\xff\x96\x28", 4));
  syscall(SYS_setsockopt, r[2], 0x29, 0x26, 0x20000040, 4);
  syscall(SYS_mprotect, 0x20000000, 0x800000, 5);
  NONFAILING(memcpy((void*)0x20000000,
                    "\xeb\xff\xcb\xff\x13\xb9\xfd\x81\x2e\xaa\x4e\x71\x30\x48"
                    "\xe6\x99\x31\x92\x96\x48",
                    20));
  syscall(SYS_setsockopt, r[1], 0x29, 0x2e, 0x20000000, 0x14);
  NONFAILING(*(uint16_t*)0x200000c0 = 0);
  NONFAILING(*(uint8_t*)0x200000c2 = 7);
  NONFAILING(*(uint32_t*)0x200000c4 = 0);
  syscall(SYS_connect, r[0], 0x200000c0, 0x1c);
  NONFAILING(memcpy((void*)0x20000100, "\x8c\x65", 2));
  syscall(SYS_write, r[1], 0x20000100, 0x6d2);
  return 0;
}