// https://syzkaller.appspot.com/bug?id=00fadf9a6326e13098672b601d57f644cae380e9
// 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 setup_binderfs()
{
  if (mkdir("/dev/binderfs", 0777)) {
  }
  if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
  }
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  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)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  setup_binderfs();
  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);
}

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 < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x200002c0, "/dev/net/tun\000", 13);
  res = syscall(__NR_openat, 0xffffffffffffff9cul, 0x200002c0ul, 0ul, 0ul);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000200, "rose0\000\000\000\000\000\000\000\000\000\000\000",
         16);
  *(uint16_t*)0x20000210 = 0x112;
  syscall(__NR_ioctl, r[0], 0x400454ca, 0x20000200ul);
  res = syscall(__NR_socket, 0xaul, 2ul, 0x88);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000900,
         "security\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000",
         32);
  *(uint32_t*)0x20000920 = 0xe;
  *(uint32_t*)0x20000924 = 4;
  *(uint32_t*)0x20000928 = 0x518;
  *(uint32_t*)0x2000092c = -1;
  *(uint32_t*)0x20000930 = 0x240;
  *(uint32_t*)0x20000934 = 0x358;
  *(uint32_t*)0x20000938 = 0;
  *(uint32_t*)0x2000093c = -1;
  *(uint32_t*)0x20000940 = -1;
  *(uint32_t*)0x20000944 = 0x448;
  *(uint32_t*)0x20000948 = 0x448;
  *(uint32_t*)0x2000094c = 0x448;
  *(uint32_t*)0x20000950 = -1;
  *(uint32_t*)0x20000954 = 4;
  *(uint64_t*)0x20000958 = 0;
  memset((void*)0x20000960, 0, 136);
  *(uint32_t*)0x200009e8 = 0;
  *(uint16_t*)0x200009ec = 0x1f8;
  *(uint16_t*)0x200009ee = 0x240;
  *(uint32_t*)0x200009f0 = 0;
  *(uint64_t*)0x200009f8 = 0;
  *(uint64_t*)0x20000a00 = 0;
  *(uint16_t*)0x20000a08 = 0x150;
  memcpy((void*)0x20000a0a,
         "hashlimit\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000a27 = 2;
  memcpy(
      (void*)0x20000a28,
      "veth1_to_"
      "bridge\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000",
      255);
  *(uint64_t*)0x20000b28 = 0;
  *(uint64_t*)0x20000b30 = 0xfff;
  *(uint32_t*)0x20000b38 = 0;
  *(uint32_t*)0x20000b3c = 0;
  *(uint32_t*)0x20000b40 = 0;
  *(uint32_t*)0x20000b44 = 9;
  *(uint32_t*)0x20000b48 = 0x803;
  *(uint8_t*)0x20000b4c = 0;
  *(uint8_t*)0x20000b4d = 0;
  *(uint64_t*)0x20000b50 = 0;
  *(uint16_t*)0x20000b58 = 0x48;
  memcpy((void*)0x20000b5a,
         "LED\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000b77 = 0;
  memcpy((void*)0x20000b78,
         "syz0\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000",
         27);
  *(uint8_t*)0x20000b93 = 0;
  *(uint32_t*)0x20000b94 = 0;
  *(uint64_t*)0x20000b98 = 0;
  memset((void*)0x20000ba0, 0, 136);
  *(uint32_t*)0x20000c28 = 0;
  *(uint16_t*)0x20000c2c = 0xf0;
  *(uint16_t*)0x20000c2e = 0x118;
  *(uint32_t*)0x20000c30 = 0;
  *(uint64_t*)0x20000c38 = 0;
  *(uint64_t*)0x20000c40 = 0;
  *(uint16_t*)0x20000c48 = 0x48;
  memcpy((void*)0x20000c4a,
         "hbh\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000c67 = 0;
  *(uint32_t*)0x20000c68 = 0;
  *(uint8_t*)0x20000c6c = 0;
  *(uint8_t*)0x20000c6d = 0;
  *(uint16_t*)0x20000c6e = 0;
  *(uint16_t*)0x20000c70 = 0;
  *(uint16_t*)0x20000c72 = 0;
  *(uint16_t*)0x20000c74 = 0;
  *(uint16_t*)0x20000c76 = 0;
  *(uint16_t*)0x20000c78 = 0;
  *(uint16_t*)0x20000c7a = 0;
  *(uint16_t*)0x20000c7c = 0;
  *(uint16_t*)0x20000c7e = 0;
  *(uint16_t*)0x20000c80 = 0;
  *(uint16_t*)0x20000c82 = 0;
  *(uint16_t*)0x20000c84 = 0;
  *(uint16_t*)0x20000c86 = 0;
  *(uint16_t*)0x20000c88 = 0;
  *(uint16_t*)0x20000c8a = 0;
  *(uint16_t*)0x20000c8c = 0;
  *(uint8_t*)0x20000c8e = 0;
  *(uint16_t*)0x20000c90 = 0x28;
  memcpy((void*)0x20000c92,
         "NFQUEUE\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000caf = 2;
  *(uint16_t*)0x20000cb0 = 0;
  *(uint16_t*)0x20000cb2 = 0xf;
  *(uint16_t*)0x20000cb4 = 0;
  *(uint8_t*)0x20000cb8 = 0xfc;
  *(uint8_t*)0x20000cb9 = 0;
  memset((void*)0x20000cba, 0, 13);
  *(uint8_t*)0x20000cc7 = 0;
  *(uint8_t*)0x20000cc8 = 0xfe;
  *(uint8_t*)0x20000cc9 = 0x80;
  memset((void*)0x20000cca, 0, 13);
  *(uint8_t*)0x20000cd7 = 0;
  *(uint32_t*)0x20000cd8 = htobe32(0);
  *(uint32_t*)0x20000cdc = htobe32(0);
  *(uint32_t*)0x20000ce0 = htobe32(0);
  *(uint32_t*)0x20000ce4 = htobe32(0);
  *(uint32_t*)0x20000ce8 = htobe32(0);
  *(uint32_t*)0x20000cec = htobe32(0);
  *(uint32_t*)0x20000cf0 = htobe32(0);
  *(uint32_t*)0x20000cf4 = htobe32(0);
  memcpy((void*)0x20000cf8, "veth1_vlan\000\000\000\000\000\000", 16);
  memcpy((void*)0x20000d08, "geneve1\000\000\000\000\000\000\000\000\000", 16);
  *(uint8_t*)0x20000d18 = 0;
  *(uint8_t*)0x20000d28 = 0;
  *(uint16_t*)0x20000d38 = 0;
  *(uint8_t*)0x20000d3a = 0;
  *(uint8_t*)0x20000d3b = 0;
  *(uint8_t*)0x20000d3c = 0;
  *(uint32_t*)0x20000d40 = 0;
  *(uint16_t*)0x20000d44 = 0xa8;
  *(uint16_t*)0x20000d46 = 0xf0;
  *(uint32_t*)0x20000d48 = 0;
  *(uint64_t*)0x20000d50 = 0;
  *(uint64_t*)0x20000d58 = 0;
  *(uint16_t*)0x20000d60 = 0x48;
  memcpy((void*)0x20000d62,
         "TEE\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000d7f = 1;
  *(uint32_t*)0x20000d80 = htobe32(0xe0000001);
  memcpy((void*)0x20000d90, "bond0\000\000\000\000\000\000\000\000\000\000\000",
         16);
  *(uint64_t*)0x20000da0 = 0;
  memset((void*)0x20000da8, 0, 136);
  *(uint32_t*)0x20000e30 = 0;
  *(uint16_t*)0x20000e34 = 0xa8;
  *(uint16_t*)0x20000e36 = 0xd0;
  *(uint32_t*)0x20000e38 = 0;
  *(uint64_t*)0x20000e40 = 0;
  *(uint64_t*)0x20000e48 = 0;
  *(uint16_t*)0x20000e50 = 0x28;
  memset((void*)0x20000e52, 0, 29);
  *(uint8_t*)0x20000e6f = 0;
  *(uint32_t*)0x20000e70 = 0xfffffffe;
  syscall(__NR_setsockopt, r[1], 0x29, 0x40, 0x20000900ul, 0x578ul);
  res = syscall(__NR_socket, 0x10ul, 3ul, 0xc);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x200011c0 = 0;
  *(uint32_t*)0x200011c8 = 0;
  *(uint64_t*)0x200011d0 = 0x20001100;
  *(uint64_t*)0x20001100 = 0x20001080;
  *(uint32_t*)0x20001080 = 0x30;
  *(uint8_t*)0x20001084 = 0;
  *(uint8_t*)0x20001085 = 0xb;
  *(uint16_t*)0x20001086 = 0x801;
  *(uint32_t*)0x20001088 = 0;
  *(uint32_t*)0x2000108c = 0;
  *(uint8_t*)0x20001090 = 3;
  *(uint8_t*)0x20001091 = 0;
  *(uint16_t*)0x20001092 = htobe16(0);
  *(uint16_t*)0x20001094 = 0xc;
  *(uint16_t*)0x20001096 = 1;
  memcpy((void*)0x20001098, "-*!$.!-\000", 8);
  *(uint16_t*)0x200010a0 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x200010a2, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200010a3, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200010a3, 0, 7, 1);
  *(uint32_t*)0x200010a4 = htobe32(0);
  *(uint16_t*)0x200010a8 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x200010aa, 3, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200010ab, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200010ab, 0, 7, 1);
  *(uint32_t*)0x200010ac = htobe32(0);
  *(uint64_t*)0x20001108 = 0x30;
  *(uint64_t*)0x200011d8 = 1;
  *(uint64_t*)0x200011e0 = 0;
  *(uint64_t*)0x200011e8 = 0;
  *(uint32_t*)0x200011f0 = 0;
  syscall(__NR_sendmsg, r[2], 0x200011c0ul, 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);
  do_sandbox_none();
  return 0;
}