// https://syzkaller.appspot.com/bug?id=e3fb87509097ba0b27a0dda3e2883b7a5ffb82b6
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static unsigned long long procid;

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 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 kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

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/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));
  }
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      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;
  *(uint32_t*)0x20000200 = 2;
  *(uint32_t*)0x20000204 = 0x80;
  *(uint8_t*)0x20000208 = 0x1b;
  *(uint8_t*)0x20000209 = 1;
  *(uint8_t*)0x2000020a = 0;
  *(uint8_t*)0x2000020b = 0;
  *(uint32_t*)0x2000020c = 0;
  *(uint64_t*)0x20000210 = 0;
  *(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, 0, 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, 0, 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, 0, 32, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 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, 0, 36, 1);
  STORE_BY_BITMASK(uint64_t, , 0x20000228, 0, 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 = 0;
  res = syscall(__NR_perf_event_open, 0x20000200ul, 0, -1ul, -1, 0ul);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20000280 = 1;
  *(uint32_t*)0x20000284 = 0x80;
  *(uint8_t*)0x20000288 = 0;
  *(uint8_t*)0x20000289 = 0;
  *(uint8_t*)0x2000028a = 0;
  *(uint8_t*)0x2000028b = 0;
  *(uint32_t*)0x2000028c = 0;
  *(uint64_t*)0x20000290 = 0x1ff;
  *(uint64_t*)0x20000298 = 0;
  *(uint64_t*)0x200002a0 = 0;
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 0, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 1, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 2, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 3, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 4, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 5, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 6, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 7, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 8, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 9, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 10, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 11, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 12, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 13, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 14, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 15, 2);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 17, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 18, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 19, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 20, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 21, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 22, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 23, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 24, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 25, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 26, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 27, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 28, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 29, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 30, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 31, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 32, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 33, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 34, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 35, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 36, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 37, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200002a8, 0, 38, 26);
  *(uint32_t*)0x200002b0 = 0;
  *(uint32_t*)0x200002b4 = 0;
  *(uint64_t*)0x200002b8 = 0;
  *(uint64_t*)0x200002c0 = 0;
  *(uint64_t*)0x200002c8 = 0;
  *(uint64_t*)0x200002d0 = 0;
  *(uint32_t*)0x200002d8 = 0;
  *(uint32_t*)0x200002dc = 0;
  *(uint64_t*)0x200002e0 = 0;
  *(uint32_t*)0x200002e8 = 0;
  *(uint16_t*)0x200002ec = 0;
  *(uint16_t*)0x200002ee = 0;
  *(uint32_t*)0x200002f0 = 0;
  *(uint32_t*)0x200002f4 = 0;
  *(uint64_t*)0x200002f8 = 0;
  syscall(__NR_perf_event_open, 0x20000280ul, 0, 0xbffffffffffffffful, -1, 0ul);
  *(uint32_t*)0x200003c0 = 1;
  *(uint32_t*)0x200003c4 = 0x80;
  *(uint8_t*)0x200003c8 = 0;
  *(uint8_t*)0x200003c9 = 0;
  *(uint8_t*)0x200003ca = 0;
  *(uint8_t*)0x200003cb = 0;
  *(uint32_t*)0x200003cc = 0;
  *(uint64_t*)0x200003d0 = 0;
  *(uint64_t*)0x200003d8 = 0;
  *(uint64_t*)0x200003e0 = 9;
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 0, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 1, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 2, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 3, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 4, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 5, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 6, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 7, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 8, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 9, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 10, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 11, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 12, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 13, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 14, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 15, 2);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 17, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 18, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 19, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 20, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 21, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 22, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 23, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 24, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 25, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 26, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 27, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 28, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 29, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 30, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 31, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 32, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 33, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 34, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 35, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 36, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 37, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200003e8, 0, 38, 26);
  *(uint32_t*)0x200003f0 = 0x80000000;
  *(uint32_t*)0x200003f4 = 0;
  *(uint64_t*)0x200003f8 = 0;
  *(uint64_t*)0x20000400 = 0;
  *(uint64_t*)0x20000408 = 0;
  *(uint64_t*)0x20000410 = 0;
  *(uint32_t*)0x20000418 = 0;
  *(uint32_t*)0x2000041c = 8;
  *(uint64_t*)0x20000420 = 0xcc32;
  *(uint32_t*)0x20000428 = 8;
  *(uint16_t*)0x2000042c = 0x235;
  *(uint16_t*)0x2000042e = 0;
  *(uint32_t*)0x20000430 = 0;
  *(uint32_t*)0x20000434 = 0;
  *(uint64_t*)0x20000438 = 0;
  res = syscall(__NR_perf_event_open, 0x200003c0ul, -1, 0ul, -1, 8ul);
  if (res != -1)
    r[1] = res;
  syscall(__NR_close, r[1]);
  *(uint64_t*)0x20000340 = 0x200001c0;
  memcpy((void*)0x200001c0, "./file0\000", 8);
  *(uint32_t*)0x20000348 = 0;
  *(uint32_t*)0x2000034c = 0;
  syscall(__NR_bpf, 7ul, 0x20000340ul, 0x10ul);
  *(uint64_t*)0x200000c0 = 3;
  syscall(__NR_ioctl, r[0], 0x40082404, 0x200000c0ul);
  syscall(__NR_close, -1);
  memcpy((void*)0x20000440, "syz1\000", 5);
  syscall(__NR_openat, -1, 0x20000440ul, 0x200002ul, 0ul);
  syscall(__NR_bpf, 0xeul, 0ul, 0ul);
  memcpy((void*)0x20000000, "&@[\000", 4);
  syscall(__NR_ioctl, r[1], 0x89a0, 0x20000000ul);
  syscall(__NR_ioctl, r[1], 0x89a1, 0ul);
  syscall(__NR_perf_event_open, 0ul, 0, 0x10ul, r[1], 3ul);
  *(uint64_t*)0x20000000 = 0;
  syscall(__NR_ioctl, -1, 0x41009432, 0x20000000ul);
  syscall(__NR_bpf, 0xful, 0ul, 0ul);
  res = syscall(__NR_openat, -1, 0ul, 0ul, 0ul);
  if (res != -1)
    r[2] = res;
  syscall(__NR_close, r[2]);
  syscall(__NR_bpf, 0xeul, 0ul, 0ul);
  syscall(__NR_bpf, 5ul, 0ul, 0ul);
  res = syscall(__NR_openat, 0xffffff9c, 0ul, 0x26e1ul, 0ul);
  if (res != -1)
    r[3] = res;
  syscall(__NR_openat, r[3], 0ul, 0x200002ul, 0ul);
}
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();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}