// https://syzkaller.appspot.com/bug?id=33bc463a99d8af2e848dc3073d67a40857a65574
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

#include <linux/capability.h>

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;
}

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;
}

#define MAX_FDS 30

static void setup_common()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

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 = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 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);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static void drop_caps(void)
{
  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    exit(1);
  const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
  cap_data[0].effective &= ~drop;
  cap_data[0].permitted &= ~drop;
  cap_data[0].inheritable &= ~drop;
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    exit(1);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  setup_common();
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  loop();
  exit(1);
}

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 close_fds()
{
  for (int fd = 3; fd < MAX_FDS; fd++)
    close(fd);
}

#define KMEMLEAK_FILE "/sys/kernel/debug/kmemleak"

static void setup_leak()
{
  if (!write_file(KMEMLEAK_FILE, "scan"))
    exit(1);
  sleep(5);
  if (!write_file(KMEMLEAK_FILE, "scan"))
    exit(1);
  if (!write_file(KMEMLEAK_FILE, "clear"))
    exit(1);
}

static void check_leaks(void)
{
  int fd = open(KMEMLEAK_FILE, O_RDWR);
  if (fd == -1)
    exit(1);
  uint64_t start = current_time_ms();
  if (write(fd, "scan", 4) != 4)
    exit(1);
  sleep(1);
  while (current_time_ms() - start < 4 * 1000)
    sleep(1);
  if (write(fd, "scan", 4) != 4)
    exit(1);
  static char buf[128 << 10];
  ssize_t n = read(fd, buf, sizeof(buf) - 1);
  if (n < 0)
    exit(1);
  int nleaks = 0;
  if (n != 0) {
    sleep(1);
    if (write(fd, "scan", 4) != 4)
      exit(1);
    if (lseek(fd, 0, SEEK_SET) < 0)
      exit(1);
    n = read(fd, buf, sizeof(buf) - 1);
    if (n < 0)
      exit(1);
    buf[n] = 0;
    char* pos = buf;
    char* end = buf + n;
    while (pos < end) {
      char* next = strstr(pos + 1, "unreferenced object");
      if (!next)
        next = end;
      char prev = *next;
      *next = 0;
      fprintf(stderr, "BUG: memory leak\n%s\n", pos);
      *next = prev;
      pos = next;
      nleaks++;
    }
  }
  if (write(fd, "clear", 5) != 5)
    exit(1);
  close(fd);
  if (nleaks)
    exit(1);
}

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();
      close_fds();
      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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    check_leaks();
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0x10ul, 0x803ul, 0);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000280 = 0;
  *(uint32_t*)0x20000288 = 0;
  *(uint64_t*)0x20000290 = 0x20000180;
  *(uint64_t*)0x20000180 = 0;
  *(uint64_t*)0x20000188 = 0;
  *(uint64_t*)0x20000298 = 1;
  *(uint64_t*)0x200002a0 = 0;
  *(uint64_t*)0x200002a8 = 0;
  *(uint32_t*)0x200002b0 = 0;
  syscall(__NR_sendmsg, r[0], 0x20000280ul, 0ul);
  *(uint32_t*)0x200002c0 = 0x14;
  res = syscall(__NR_getsockname, r[0], 0x20000100ul, 0x200002c0ul);
  if (res != -1)
    r[1] = *(uint32_t*)0x20000104;
  *(uint64_t*)0x20000240 = 0;
  *(uint32_t*)0x20000248 = 0;
  *(uint64_t*)0x20000250 = 0x20000140;
  *(uint64_t*)0x20000140 = 0x200003c0;
  memcpy((void*)0x200003c0, "\x38\x00\x00\x00\x24\x00\x07\x05\xa9\x9a\x00\x40"
                            "\x07\xa2\xa3\x00\x05\x00\x00\x00",
         20);
  *(uint32_t*)0x200003d4 = r[1];
  memcpy((void*)0x200003d8, "\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00"
                            "\x09\x00\x01\x00\x68\x66\x73\x63\x00\x00\x00\x00"
                            "\x08\x00\x02",
         27);
  *(uint64_t*)0x20000148 = 0x38;
  *(uint64_t*)0x20000258 = 1;
  *(uint64_t*)0x20000260 = 0;
  *(uint64_t*)0x20000268 = 0;
  *(uint32_t*)0x20000270 = 0xc000;
  syscall(__NR_sendmsg, -1, 0x20000240ul, 0ul);
  *(uint64_t*)0x200001c0 = 0;
  *(uint32_t*)0x200001c8 = 0;
  *(uint64_t*)0x200001d0 = 0x20000180;
  *(uint64_t*)0x20000180 = 0x20000300;
  *(uint32_t*)0x20000300 = 0x44;
  *(uint16_t*)0x20000304 = 0x2c;
  *(uint16_t*)0x20000306 = 0xd27;
  *(uint32_t*)0x20000308 = 0;
  *(uint32_t*)0x2000030c = 0;
  *(uint8_t*)0x20000310 = 0;
  *(uint8_t*)0x20000311 = 0;
  *(uint16_t*)0x20000312 = 0;
  *(uint32_t*)0x20000314 = r[1];
  *(uint16_t*)0x20000318 = 0;
  *(uint16_t*)0x2000031a = 0;
  *(uint16_t*)0x2000031c = 0;
  *(uint16_t*)0x2000031e = 0;
  *(uint16_t*)0x20000320 = 4;
  *(uint16_t*)0x20000322 = 8;
  *(uint16_t*)0x20000324 = 0xc;
  *(uint16_t*)0x20000326 = 1;
  memcpy((void*)0x20000328, "tcindex\000", 8);
  *(uint16_t*)0x20000330 = 0x14;
  *(uint16_t*)0x20000332 = 2;
  *(uint16_t*)0x20000334 = 8;
  *(uint16_t*)0x20000336 = 5;
  *(uint16_t*)0x20000338 = 0;
  *(uint16_t*)0x2000033a = 5;
  *(uint16_t*)0x2000033c = 6;
  *(uint16_t*)0x2000033e = 2;
  *(uint16_t*)0x20000340 = 0;
  *(uint64_t*)0x20000188 = 0x44;
  *(uint64_t*)0x200001d8 = 1;
  *(uint64_t*)0x200001e0 = 0;
  *(uint64_t*)0x200001e8 = 0;
  *(uint32_t*)0x200001f0 = 0;
  syscall(__NR_sendmsg, -1, 0x200001c0ul, 0ul);
  res = syscall(__NR_socket, 0x10ul, 0x80002ul, 0);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x20000200 = 6;
  *(uint32_t*)0x20000208 = 0;
  *(uint64_t*)0x20000210 = 0x20000100;
  *(uint64_t*)0x20000218 = 9;
  *(uint64_t*)0x20000220 = 0x200005c0;
  *(uint64_t*)0x200005c0 = 0;
  *(uint32_t*)0x200005c8 = 0x117;
  *(uint32_t*)0x200005cc = 2;
  *(uint32_t*)0x200005d0 = 0;
  memcpy((void*)0x200005d4,
         "\x15\xdc\x91\x76\x8c\x78\xba\x00\x96\x0b\x7a\x5e\x4e\x79\x07\x52\x6d"
         "\x7c\x7c\x8a\xee\x96\x8a\x56\x2b\x00\xcb\x90\x5e\x18\x26\xa8\xf9\xee"
         "\x0a\xc4\x80\x57\x6a\x71\x34\x80\x1f\xc0\x70\x04\x19\x84\xc5\xc2\x3f"
         "\xa0\xf9\x3b\x59\x07\x58\x53\xf7\x05\x45\xce\x9c\x61\xb1\x5f\xf6\x5c"
         "\xde\x50\x78\xb4\x20\x92\x17\xf0\x22\x0f\x08\x10\xf7\x39\xbd\x47\x0d"
         "\x40\x52\x72\xed\xb1\x64\x34\xa1\x18\x69\xd0\x8d\x8f\xef\x06\x5d\xe9"
         "\x47\x10\xee\x55\x3b\x41\x0c\x3c\x02\xa9\x6c\x15\x68\x36\xaf\x8d\x11"
         "\xc4\xaf\x4a\x77\xe7\x66\xf9\xed\x8e\xc4\x38\x30\xfe\x02\xbb\x22\xba"
         "\xbf\x9b\x41\xd4\xe5\x02\x7b\x49\xba\x3f\x72\x04\x65\xbf\x4e\xe9\xb6"
         "\x38\x92\x03\x0f\x4f\xea\x97\xd9\x4b\xc6\xcd\x1a\x7d\x4d\x68\x69\xcb"
         "\x31\x85\xe5\xda\x3c\xa0\xda",
         177);
  *(uint64_t*)0x20000688 = 0;
  *(uint32_t*)0x20000690 = 0x117;
  *(uint32_t*)0x20000694 = 3;
  *(uint32_t*)0x20000698 = 0;
  *(uint64_t*)0x200006a0 = 0;
  *(uint32_t*)0x200006a8 = 0x117;
  *(uint32_t*)0x200006ac = 4;
  *(uint32_t*)0x200006b0 = 0;
  *(uint64_t*)0x200006b8 = 0;
  *(uint32_t*)0x200006c0 = 0x117;
  *(uint32_t*)0x200006c4 = 4;
  *(uint32_t*)0x200006c8 = 0;
  *(uint64_t*)0x200006d0 = 0;
  *(uint32_t*)0x200006d8 = 0x117;
  *(uint32_t*)0x200006dc = 3;
  *(uint32_t*)0x200006e0 = 0;
  *(uint64_t*)0x200006e8 = 0x35;
  *(uint32_t*)0x200006f0 = 0x117;
  *(uint32_t*)0x200006f4 = 3;
  *(uint32_t*)0x200006f8 = 0;
  *(uint64_t*)0x20000228 = 0;
  *(uint32_t*)0x20000230 = 0;
  syscall(__NR_sendmmsg, r[2], 0x20000200ul, 0x4924924924924b3ul, 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_leak();
  do_sandbox_none();
  return 0;
}