// https://syzkaller.appspot.com/bug?id=a7e7703f43319750ed88a5c0d930d283b51f4e77
// 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;
}

#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;
}

#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 (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);
}

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

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; 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;
    }
  }
}

uint64_t r[6] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0,
                 0xffffffffffffffff, 0xffffffffffffffff, 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0ul);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 0x10ul, 0x803ul, 0);
  if (res != -1)
    r[1] = res;
  *(uint64_t*)0x200001c0 = 0;
  *(uint32_t*)0x200001c8 = 0;
  *(uint64_t*)0x200001d0 = 0x20000180;
  *(uint64_t*)0x20000180 = 0;
  *(uint64_t*)0x20000188 = 0;
  *(uint64_t*)0x200001d8 = 1;
  *(uint64_t*)0x200001e0 = 0;
  *(uint64_t*)0x200001e8 = 0;
  *(uint32_t*)0x200001f0 = 0;
  syscall(__NR_sendmsg, r[1], 0x200001c0ul, 0ul);
  *(uint32_t*)0x20000200 = 0x14;
  res = syscall(__NR_getsockname, r[1], 0x20000100ul, 0x20000200ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x20000104;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0ul);
  if (res != -1)
    r[3] = res;
  res = syscall(__NR_socket, 0x10ul, 0x803ul, 0);
  if (res != -1)
    r[4] = res;
  *(uint64_t*)0x200001c0 = 0;
  *(uint32_t*)0x200001c8 = 0;
  *(uint64_t*)0x200001d0 = 0x20000180;
  *(uint64_t*)0x20000180 = 0;
  *(uint64_t*)0x20000188 = 0;
  *(uint64_t*)0x200001d8 = 1;
  *(uint64_t*)0x200001e0 = 0;
  *(uint64_t*)0x200001e8 = 0;
  *(uint32_t*)0x200001f0 = 0;
  syscall(__NR_sendmsg, r[4], 0x200001c0ul, 0ul);
  *(uint32_t*)0x20000200 = 0x14;
  res = syscall(__NR_getsockname, r[4], 0x20000100ul, 0x20000200ul);
  if (res != -1)
    r[5] = *(uint32_t*)0x20000104;
  *(uint64_t*)0x20000040 = 0;
  *(uint32_t*)0x20000048 = 0;
  *(uint64_t*)0x20000050 = 0x20000000;
  *(uint64_t*)0x20000000 = 0x20000540;
  memcpy((void*)0x20000540, "\x48\x00\x00\x00\x10\x00\x05\x07\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00",
         20);
  *(uint32_t*)0x20000554 = r[5];
  memcpy((void*)0x20000558,
         "\x00\x00\x00\x00\x00\x00\x00\x00\x28\x00\x12\x00\x0c\x00\x01\x00\x76"
         "\x65\x74\x68\x00\x00\x00\x00\x18\x00\x02\x00\xfd\x00\x01\x00\x00\x00"
         "\x00\x00\x23\xc0\x30\x65\x54\x36\x2d\xdd\xcb\x89\x2e\xf8\x05\x14\x04"
         "\xbd\xe5\xbf\x29\x6e\x3c\x56\x6a\x03\xd7\x24\xf7\xea\xd1\xef\x33\xad"
         "\xfd\xbe\x08\xb8\xc5\x23\x6b\x93\xb9\x79\x7b\x44\x09\xf6\xe3\x70\xd1"
         "\x51\x5d\x2e\x1f\xa6\x32\x59\xe6\xd4\xbd\x05\x77\x29\x81",
         99);
  *(uint32_t*)0x200005bb = 0;
  memcpy(
      (void*)0x200005bf,
      "\x00\x00\x00\x79\xab\xd1\x93\x2a\x9e\xc8\xa3\xa6\x36\x73\xa3\x6d\x66\xb1"
      "\x03\xe1\xfd\xbb\x46\x78\x73\x1c\x44\xd5\x77\x2a\x8b\x52\xf8\x81\x32\x61"
      "\x3f\x2a\xb9\xfa\xa4\x8e\x75\xb0\x50\x8e\x23\x67\x01\x8d\xc4\x47\x9c\x67"
      "\x57\xb0\xa5\x62\x21\x07\xe7\x80\xa5\x2d\x43\xa2\x22\xd4\xaa\x8f\xa0\xc3"
      "\xe9\x61\xe2\x40\x1d\x5d\xbb\x22\x10\x7c\xe4\x58\x4d\x22\xa3\x5c\x2f\xf5"
      "\xc7\x06\x97\x79\xf3\xa8\xe8\x88\xa8\xac\x94\x31\x2c\xdb\x43\xf7\x90\x7e"
      "\xbf\xcf\x3d\xc4\xad\x1f\x5e\x75\x77\xc5\xc2\xc9\x14\x64\x39\xe6\x91\x0c"
      "\x43\x7a\x82\x13\xe1\x77\xdf\xca\x08\xfb\x12\xf6\xc6\xa8\x34\x38\x21\xe5"
      "\x3d\x1f\x0e\xf2\x45\x75\x79\x71\x41\xdd\x16\xb8\x06\x50\x42\x50\x00\x17"
      "\xc0\xba\xb7\x26\x5b\xa1\x85\xfa\x61\x40\x41\x45\xc5\x00\xbe\x7e\x57\xf2"
      "\xaf\x45\x57\x65\xc6\x75\xc7\x10\xda\x30\xfb\x91\x5a\xbb\xfc\xb8\xfe\x5e"
      "\x5a\x54\xf9\x98\xae\xb8\xec\xb8\x69\x53\x7d\x7d\xdb\x52\x9a\x8d\x66\xa4"
      "\x90\x55\x86\xc9\xdd\x0d\x81\xd4\x84\x1e\x2c\x90\xbd\x8f\xa2\xbf\x38\x02"
      "\xbf\x96\x3e\xda\xae\x01\xeb\xd1\x25\x51\x0b\xbe\x75\xbe\xac\x07\x7a\xf7"
      "\x73\xd5\xd2\xa3\x4b\x25\x6e\x83\x69\xf6\x8b\x0f\xca\xb8\x7c\x7e\xe0\x33"
      "\x99\x7f\x53\xb6\x35\xb5\x9a\xc5\xaa\x14\x56\xd0\xb3\x5e\x1d\xd7\x34\x14"
      "\x9d\xbc\xf5\x41\xd7\x44\x96\x2b\x2b\xd0\xec\xe4\xc2\x67\x76\x0c\x3a\x6d"
      "\x4b\xce\x9b\x03\x00\x00\x00\xcf\xa7\x03\xa1\xa4\x8b\x59\x70\x0f\x8c\x90"
      "\x2e\x46\xae\x26\xe6\xe3\x11\x85\xa1\x9c\x07\x95\x9e\xdc\xb6\xbf\xc8\x8c"
      "\x9e\x6b\xc1\x24\x14\x75\x21\xf6\xeb\x32\x72\x31\xe3\x57\x85\x95\x13\x77"
      "\xc4\x0b\x71\x3a\x4f\x68\x54\xb0\x2c\x42\x8b\xef\x06\x8f\x94\x94\xaa\x8f"
      "\xc9\xf9\x9d\xdf\xf4\x0e\xf4\xfd\xc9\x36\x0e\xb1\xbc\x2a\x25\xac\x49\x1f"
      "\x2b\xc9\xc7\xa2\x3f\xe5\x66\x21\x70\xfe\xb5\x5b\x39\x99\xb4\x5b\x8b\x80"
      "\xa8\x43\x8d\xf1\x9e\x18\x3d\x85\x46\x91\xa1\xf2\xb3\x43\x52\xfe\xd5\x22"
      "\xc4\x26\x5e\x4e\xce\x52\xf3\x5d\x35\x1a\x16\x76\x98\x2c\xe0\xf2\xeb\x2c"
      "\x45\x4b\x9d\xf0\x4b\x97\x61\x79\x61\x1f\x1b\xe4\xde\xac\x0d\xd4\xc7\x9a"
      "\x12\x2f\x3d\x33\xe5\x2b\xcc\xe3\x88\x08\x80\x98\x20\x09\x4c\x31\xaf\x5c"
      "\xca\x2d\x79\xbf\x78\x3b\xb8\x75\x88\xd8\xc2\x1b\xad\x66\x3b\xbd\xe2\x64"
      "\x4c\xab\x2b\x60\x5d\x0c\xa9\x1b\x5c\x24\x17\xab\x7c\x7b\xba\x51\x73\xb0"
      "\xbf\xdd\xfd\x1d\x87\xce\x6d\x25\x7c\x05\x26\xfc\x05\x1a\xda\xf7\x83\xcb"
      "\x44\xe5\xf0\x98\x99\x88\x6b\x26\xca\x74\x6f\x8d\x2b\x39\x2e\x08\x71\xbc"
      "\xa6\xf1\xcb\x40\xc5\xac\x1b\xf5\xca\x80\xb9\x34\x42\x4d\xed\xdf\xb5\x47"
      "\xd8\xf9\xa3\x8a\x25\xaa\x39\x75\x2c\xac\x86\x69\x86\xbb\x0f\xaa\xf0\x7f"
      "\xfe\xec\xd2\x7b\xd7\x36\xfa\x1a\x05\x8e\xe5\xb1\x7a\xdb\xde\x60\x5e\xb5"
      "\xf3\x64\x8b\x4e\xe0\x13\x64\x0d\x01\x8b\x42\xef\x6b",
      625);
  *(uint64_t*)0x20000008 = 0x48;
  *(uint64_t*)0x20000058 = 1;
  *(uint64_t*)0x20000060 = 0;
  *(uint64_t*)0x20000068 = 0;
  *(uint32_t*)0x20000070 = 0;
  syscall(__NR_sendmsg, r[3], 0x20000040ul, 0ul);
  *(uint64_t*)0x20000140 = 0;
  *(uint32_t*)0x20000148 = 0;
  *(uint64_t*)0x20000150 = 0x20000240;
  *(uint64_t*)0x20000240 = 0x20000080;
  *(uint32_t*)0x20000080 = 0x3c;
  *(uint16_t*)0x20000084 = 0x10;
  *(uint16_t*)0x20000086 = 0x581;
  *(uint32_t*)0x20000088 = 0;
  *(uint32_t*)0x2000008c = 0;
  *(uint8_t*)0x20000090 = 0;
  *(uint8_t*)0x20000091 = 0;
  *(uint16_t*)0x20000092 = 0;
  *(uint32_t*)0x20000094 = r[5];
  *(uint32_t*)0x20000098 = 0;
  *(uint32_t*)0x2000009c = 0;
  *(uint16_t*)0x200000a0 = 0x14;
  STORE_BY_BITMASK(uint16_t, , 0x200000a2, 0x12, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200000a3, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200000a3, 1, 7, 1);
  *(uint16_t*)0x200000a4 = 0xb;
  *(uint16_t*)0x200000a6 = 1;
  memcpy((void*)0x200000a8, "ipvlan\000", 7);
  *(uint16_t*)0x200000b0 = 4;
  STORE_BY_BITMASK(uint16_t, , 0x200000b2, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200000b3, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200000b3, 1, 7, 1);
  *(uint16_t*)0x200000b4 = 8;
  *(uint16_t*)0x200000b6 = 5;
  *(uint32_t*)0x200000b8 = r[2];
  *(uint64_t*)0x20000248 = 0x3c;
  *(uint64_t*)0x20000158 = 1;
  *(uint64_t*)0x20000160 = 0;
  *(uint64_t*)0x20000168 = 0;
  *(uint32_t*)0x20000170 = 0;
  syscall(__NR_sendmsg, r[0], 0x20000140ul, 0ul);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0);
  do_sandbox_none();
  return 0;
}