// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static void setup_sysctl()
{
  char mypid[32];
  snprintf(mypid, sizeof(mypid), "%d", getpid());
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/net/ipv4/ping_group_range", "0 65535"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", mypid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data))
      printf("write to %s failed: %s\n", files[i].name, strerror(errno));
  }
}

int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  setup_sysctl();

  *(uint32_t*)0x20000200 = 0;
  *(uint32_t*)0x20000204 = 0x80;
  *(uint8_t*)0x20000208 = 0;
  *(uint8_t*)0x20000209 = 0;
  *(uint8_t*)0x2000020a = 0;
  *(uint8_t*)0x2000020b = 0;
  *(uint32_t*)0x2000020c = 0;
  *(uint64_t*)0x20000210 = 8;
  *(uint64_t*)0x20000218 = 0;
  *(uint64_t*)0x20000220 = 0;
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 0, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 1, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 2, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 3, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 4, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 1, 5, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 6, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 7, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 8, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 9, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 1, 10, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 11, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 12, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 13, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 14, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 15, 2);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 17, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 18, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 19, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 20, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 21, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 22, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 23, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 24, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 25, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 26, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 27, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 28, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 29, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 30, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 31, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 1, 32, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 1, 33, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 34, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 35, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 1, 36, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 1, 37, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 38, 26);
  *(uint32_t*)0x20000230 = 0;
  *(uint32_t*)0x20000234 = 0;
  *(uint64_t*)0x20000238 = 0;
  *(uint64_t*)0x20000240 = 0;
  *(uint64_t*)0x20000248 = 0;
  *(uint64_t*)0x20000250 = 0;
  *(uint32_t*)0x20000258 = 0;
  *(uint32_t*)0x2000025c = 0;
  *(uint64_t*)0x20000260 = 0;
  *(uint32_t*)0x20000268 = 0;
  *(uint16_t*)0x2000026c = 0;
  *(uint16_t*)0x2000026e = 0;
  *(uint32_t*)0x20000270 = 0;
  *(uint32_t*)0x20000274 = 0;
  *(uint64_t*)0x20000278 = 0xd62;
  syscall(__NR_perf_event_open, 0x20000200ul, 0, 0ul, -1, 3ul);
  return 0;
}