// https://syzkaller.appspot.com/bug?id=863062f13a8a2f39978ed5dfa92d891efe032e23
// 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 <sys/types.h>
#include <sys/wait.h>
#include <time.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;
  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;                                                                        \
  })

static void kill_and_wait(int pid, int* status)
{
  kill(pid, SIGKILL);
  while (waitpid(-1, status, 0) != pid) {
  }
}

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

#define __syscall syscall

static void execute_one(void);

#define WAIT_FLAGS 0

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  syscall(SYS_openat, 0xffffffffffffff9cul, 0ul, 0x10281ul, 0ul);
  NONFAILING(memcpy((void*)0x20000000, "/dev/pf\000", 8));
  res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x20000000ul, 2ul, 0ul);
  if (res != -1)
    r[0] = res;
  NONFAILING(*(uint32_t*)0x20000040 = 0);
  NONFAILING(*(uint32_t*)0x20000044 = 0);
  NONFAILING(*(uint8_t*)0x20000048 = 0);
  NONFAILING(*(uint16_t*)0x2000004a = 0);
  NONFAILING(*(uint64_t*)0x20000050 = 0x20000d80);
  NONFAILING(*(uint8_t*)0x20000d80 = 0);
  NONFAILING(*(uint8_t*)0x20000d81 = 0);
  NONFAILING(*(uint8_t*)0x20000d82 = 0);
  NONFAILING(*(uint8_t*)0x20000d83 = 0);
  NONFAILING(*(uint8_t*)0x20000d84 = 0);
  NONFAILING(*(uint16_t*)0x20000d86 = 0);
  NONFAILING(*(uint32_t*)0x20000d88 = 0);
  NONFAILING(*(uint64_t*)0x20000d90 = 0);
  NONFAILING(*(uint64_t*)0x20000d98 = 0);
  NONFAILING(*(uint64_t*)0x20000da0 = 0);
  NONFAILING(*(uint64_t*)0x20000da8 = 0xfffffffffffffffc);
  NONFAILING(*(uint64_t*)0x20000db0 = 0);
  NONFAILING(*(uint64_t*)0x20000db8 = -1);
  NONFAILING(*(uint64_t*)0x20000dc0 = 0);
  NONFAILING(*(uint64_t*)0x20000dc8 = 0);
  NONFAILING(*(uint64_t*)0x20000dd0 = 2);
  NONFAILING(*(uint64_t*)0x20000dd8 = 0);
  NONFAILING(*(uint64_t*)0x20000de0 = 0);
  NONFAILING(*(uint64_t*)0x20000de8 = 0);
  NONFAILING(*(uint64_t*)0x20000df0 = 0);
  NONFAILING(*(uint64_t*)0x20000df8 = 0);
  NONFAILING(*(uint64_t*)0x20000e00 = 0);
  NONFAILING(*(uint64_t*)0x20000e08 = 0);
  NONFAILING(*(uint64_t*)0x20000e10 = 0);
  NONFAILING(*(uint64_t*)0x20000e18 = 0);
  NONFAILING(*(uint64_t*)0x20000e20 = 0);
  NONFAILING(*(uint64_t*)0x20000e28 = 2);
  NONFAILING(*(uint64_t*)0x20000e30 = 0);
  NONFAILING(*(uint64_t*)0x20000e38 = 0);
  NONFAILING(*(uint64_t*)0x20000e40 = 0);
  NONFAILING(*(uint64_t*)0x20000e48 = 0);
  NONFAILING(*(uint64_t*)0x20000e50 = 0);
  NONFAILING(*(uint64_t*)0x20000e58 = 0);
  NONFAILING(*(uint64_t*)0x20000e60 = 0);
  NONFAILING(*(uint64_t*)0x20000e68 = 0);
  NONFAILING(*(uint64_t*)0x20000e70 = 0);
  NONFAILING(*(uint64_t*)0x20000e78 = 0);
  NONFAILING(*(uint64_t*)0x20000e80 = 0);
  NONFAILING(*(uint64_t*)0x20000e88 = 0);
  NONFAILING(*(uint64_t*)0x20000e90 = 0);
  NONFAILING(*(uint64_t*)0x20000e98 = 0xfffffffffffffffd);
  NONFAILING(*(uint64_t*)0x20000ea0 = 3);
  NONFAILING(*(uint64_t*)0x20000ea8 = 0);
  NONFAILING(*(uint64_t*)0x20000eb0 = 0);
  NONFAILING(*(uint64_t*)0x20000eb8 = 0);
  NONFAILING(*(uint64_t*)0x20000ec0 = 0);
  NONFAILING(*(uint64_t*)0x20000ec8 = 0);
  NONFAILING(*(uint64_t*)0x20000ed0 = 0);
  NONFAILING(*(uint16_t*)0x20000ed8 = 0);
  NONFAILING(*(uint32_t*)0x20000edc = 0);
  NONFAILING(*(uint32_t*)0x20000ee0 = 0);
  NONFAILING(*(uint64_t*)0x20000ee8 = 0);
  NONFAILING(*(uint16_t*)0x20000ef0 = 0);
  NONFAILING(*(uint32_t*)0x20000ef4 = 0);
  NONFAILING(*(uint32_t*)0x20000ef8 = 0);
  NONFAILING(*(uint64_t*)0x20000f00 = 0);
  NONFAILING(*(uint16_t*)0x20000f08 = 0);
  NONFAILING(*(uint32_t*)0x20000f0c = 0);
  NONFAILING(*(uint32_t*)0x20000f10 = 0x7ff);
  NONFAILING(*(uint64_t*)0x20000f18 = 0);
  NONFAILING(*(uint16_t*)0x20000f20 = 0);
  NONFAILING(*(uint32_t*)0x20000f24 = 0);
  NONFAILING(*(uint32_t*)0x20000f28 = 0);
  NONFAILING(*(uint64_t*)0x20000f30 = 0);
  NONFAILING(*(uint16_t*)0x20000f38 = 0x10);
  NONFAILING(*(uint32_t*)0x20000f3c = 0);
  NONFAILING(*(uint32_t*)0x20000f40 = 0);
  NONFAILING(*(uint64_t*)0x20000f48 = 0x10000000000000);
  NONFAILING(*(uint16_t*)0x20000f50 = 0);
  NONFAILING(*(uint32_t*)0x20000f54 = 0);
  NONFAILING(*(uint32_t*)0x20000f58 = 0);
  NONFAILING(*(uint64_t*)0x20000f60 = 0);
  NONFAILING(*(uint16_t*)0x20000f68 = 0);
  NONFAILING(*(uint32_t*)0x20000f6c = 0);
  NONFAILING(*(uint32_t*)0x20000f70 = 0);
  NONFAILING(*(uint64_t*)0x20000f78 = 0x80000000000);
  NONFAILING(*(uint16_t*)0x20000f80 = 0);
  NONFAILING(*(uint32_t*)0x20000f84 = 0);
  NONFAILING(*(uint32_t*)0x20000f88 = 0);
  NONFAILING(*(uint64_t*)0x20000f90 = 0);
  NONFAILING(*(uint16_t*)0x20000f98 = 0);
  NONFAILING(*(uint32_t*)0x20000f9c = 0);
  NONFAILING(*(uint32_t*)0x20000fa0 = 0);
  NONFAILING(*(uint64_t*)0x20000fa8 = 0);
  NONFAILING(*(uint16_t*)0x20000fb0 = 0);
  NONFAILING(*(uint32_t*)0x20000fb4 = 0);
  NONFAILING(*(uint32_t*)0x20000fb8 = 0);
  NONFAILING(*(uint64_t*)0x20000fc0 = 0);
  NONFAILING(*(uint16_t*)0x20000058 = 0);
  NONFAILING(*(uint8_t*)0x2000005a = 0);
  syscall(SYS_ioctl, -1, 0xc0205602ul, 0x20000040ul);
  NONFAILING(*(uint32_t*)0x20000240 = 6);
  syscall(SYS_ioctl, r[0], 0xcd60441aul, 0x20000240ul);
  NONFAILING(memcpy((void*)0x20000000, "/dev/pf\000", 8));
  res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x20000000ul, 2ul, 0ul);
  if (res != -1)
    r[1] = res;
  NONFAILING(*(uint32_t*)0x20000240 = 2);
  syscall(SYS_ioctl, r[1], 0xcd60441aul, 0x20000240ul);
  syscall(SYS_ioctl, r[0], 0xcd60441aul, 0ul);
  NONFAILING(*(uint32_t*)0x20000000 = 0);
  NONFAILING(*(uint32_t*)0x20000004 = 0);
  NONFAILING(*(uint64_t*)0x20000008 = 0);
  NONFAILING(*(uint64_t*)0x20000010 = 0x10000000000001);
  syscall(SYS_ioctl, -1, 0x80185760ul, 0x20000000ul);
  NONFAILING(*(uint32_t*)0x200000c0 = 0);
  NONFAILING(*(uint32_t*)0x200000c4 = 0);
  NONFAILING(*(uint32_t*)0x200000c8 = -1);
  NONFAILING(*(uint32_t*)0x200000cc = 0);
  NONFAILING(memcpy((void*)0x200000d0,
                    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf2\xff\xff\xff"
                    "\xff\xff\xff\xff\x40\x00",
                    20));
  NONFAILING(*(uint32_t*)0x200000e4 = 0);
  NONFAILING(*(uint32_t*)0x200000e8 = 0);
  syscall(SYS_ioctl, -1, 0x802c7414ul, 0x200000c0ul);
  NONFAILING(*(uint16_t*)0x200000c0 = 0x18e6);
  NONFAILING(*(uint8_t*)0x200000c2 = 7);
  NONFAILING(*(uint32_t*)0x200000c4 = 0);
  syscall(SYS_connect, -1, 0x200000c0ul, 0x1cul);
  syscall(SYS_mprotect, 0x20000000ul, 0x800000ul, 5ul);
  syscall(SYS_socket, 0x18ul, 1ul, 0);
  res = syscall(SYS_socket, 0x18ul, 1ul, 0);
  if (res != -1)
    r[2] = res;
  syscall(SYS_close, r[2]);
  res = syscall(SYS_socket, 0x18ul, 2ul, 0);
  if (res != -1)
    r[3] = res;
  syscall(SYS_socket, 0x18ul, 3ul, 0x3a);
  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[3], 0x29, 0x2e, 0x20000000ul, 0x14ul);
  NONFAILING(*(uint16_t*)0x200000c0 = 0);
  NONFAILING(*(uint8_t*)0x200000c2 = 7);
  NONFAILING(*(uint32_t*)0x200000c4 = 0);
  syscall(SYS_connect, r[2], 0x200000c0ul, 0x1cul);
  syscall(SYS_write, r[3], 0ul, 0ul);
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul, 0ul);
  install_segv_handler();
  loop();
  return 0;
}