// https://syzkaller.appspot.com/bug?id=7ef63c67437650b80e78a4da4bd1d4b3d1fa8bc9
// 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 clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _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(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

#define __syscall syscall

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul);
  install_segv_handler();
  intptr_t res = 0;
  res = syscall(SYS_socket, 0x18ul, 1ul, 0);
  if (res != -1)
    r[0] = res;
  res = syscall(SYS_dup, r[0]);
  if (res != -1)
    r[1] = res;
  NONFAILING(*(uint64_t*)0x20000200 = 0);
  NONFAILING(*(uint32_t*)0x20000208 = 0);
  NONFAILING(*(uint64_t*)0x20000210 = 0);
  NONFAILING(*(uint64_t*)0x20000218 = 0);
  NONFAILING(*(uint64_t*)0x20000220 = 0x20000800);
  NONFAILING(*(uint64_t*)0x20000800 = 0x10);
  NONFAILING(*(uint32_t*)0x20000808 = 0xffff);
  NONFAILING(*(uint32_t*)0x2000080c = 1);
  NONFAILING(*(uint64_t*)0x20000228 = 0x10);
  NONFAILING(*(uint32_t*)0x20000230 = 0);
  syscall(SYS_sendmsg, r[1], 0x20000200ul, 0ul);
  return 0;
}