// 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 <errno.h>
#include <sched.h>
#include <signal.h>
#include <signal.h>
#include <stdarg.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdio.h>
#include <sys/prctl.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/time.h>
#include <sys/wait.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 loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();

  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);

#define CLONE_NEWCGROUP 0x02000000

  unshare(CLONE_NEWNS);
  unshare(CLONE_NEWIPC);
  unshare(CLONE_NEWCGROUP);
  unshare(CLONE_NEWNET);
  unshare(CLONE_NEWUTS);
  unshare(CLONE_SYSVSEM);
}

static int do_sandbox_none(int executor_pid, bool enable_tun)
{
  unshare(CLONE_NEWPID);
  int pid = fork();
  if (pid < 0)
    fail("sandbox fork failed");
  if (pid)
    return pid;

  sandbox_common();

  loop();
  doexit(1);
}

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, 0x3, 0x32, 0xffffffff, 0x0);
  r[0] = syscall(__NR_socket, 0x26, 0x5, 0x0);
  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 = 0x0);
  NONFAILING(*(uint32_t*)0x20f74014 = 0x0);
  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*)0x20a5b000,
                    "\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, 0x1, 0x20a5b000, 0x20);
  r[1] = syscall(__NR_accept, r[0], 0x0, 0x0);
  NONFAILING(memcpy((void*)0x2059aeed,
                    "\x03\x78\x9f\x23\x46\xf5\xa6\x37\x45\x7f\x99\x9b"
                    "\x2d\xa8\x15\xc5\xe2\x3c\x5c\xc5\xdf\x21\x4c\x7a"
                    "\x32\x0e\xd0\x6e\x52\x34\xcf\x97\x23\x41\xca\x38"
                    "\x5e\x82\x9c\x98\x01\x44\xc9\x0f\x6e\x4a\x89\x04",
                    48));
  syscall(__NR_write, r[1], 0x2059aeed, 0x30);
  NONFAILING(*(uint64_t*)0x206e3000 = 0x20f76000);
  NONFAILING(*(uint32_t*)0x206e3008 = 0x80);
  NONFAILING(*(uint64_t*)0x206e3010 = 0x20f7ffd0);
  NONFAILING(*(uint64_t*)0x206e3018 = 0x1);
  NONFAILING(*(uint64_t*)0x206e3020 = 0x20f76f1d);
  NONFAILING(*(uint64_t*)0x206e3028 = 0x0);
  NONFAILING(*(uint32_t*)0x206e3030 = 0x0);
  NONFAILING(*(uint64_t*)0x20f7ffd0 = 0x20295000);
  NONFAILING(*(uint64_t*)0x20f7ffd8 = 0x1000);
  syscall(__NR_recvmsg, r[1], 0x206e3000, 0x0);
}

int main()
{
  install_segv_handler();
  for (;;) {
    int pid = do_sandbox_none(0, false);
    int status = 0;
    while (waitpid(pid, &status, __WALL) != pid) {
    }
  }
}