// https://syzkaller.appspot.com/bug?id=180598f76646ec1ff99e945d171e3ed4ad9b95c9
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.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 <unistd.h>

#include <linux/capability.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_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);
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0x0};

void loop(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0ul);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0ul);
  if (res != -1)
    r[1] = res;
  res = syscall(__NR_socket, 0x10ul, 0x803ul, 0);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x20000780 = 0;
  *(uint32_t*)0x20000788 = 6;
  *(uint64_t*)0x20000790 = 0x20000180;
  *(uint64_t*)0x20000180 = 0;
  *(uint64_t*)0x20000188 = 0;
  *(uint64_t*)0x20000798 = 1;
  *(uint64_t*)0x200007a0 = 0;
  *(uint64_t*)0x200007a8 = 0;
  *(uint32_t*)0x200007b0 = 0;
  syscall(__NR_sendmsg, r[2], 0x20000780ul, 0ul);
  *(uint32_t*)0x20000200 = 0x14;
  res = syscall(__NR_getsockname, r[2], 0x20000100ul, 0x20000200ul);
  if (res != -1)
    r[3] = *(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\x00\x00\x00\x40"
                            "\x07\xa2\xa3\x00\x05\x00\x00\x00",
         20);
  *(uint32_t*)0x200003d4 = r[3];
  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\x00\x00\x00\x00\x00",
         32);
  *(uint64_t*)0x20000148 = 0x38;
  *(uint64_t*)0x20000258 = 1;
  *(uint64_t*)0x20000260 = 0;
  *(uint64_t*)0x20000268 = 0;
  *(uint32_t*)0x20000270 = 0;
  syscall(__NR_sendmsg, r[1], 0x20000240ul, 0ul);
  *(uint64_t*)0x200001c0 = 0;
  *(uint32_t*)0x200001c8 = 0;
  *(uint64_t*)0x200001d0 = 0x20000180;
  *(uint64_t*)0x20000180 = 0x20000400;
  *(uint32_t*)0x20000400 = 0xf0;
  *(uint16_t*)0x20000404 = 0x2c;
  *(uint16_t*)0x20000406 = 0xd27;
  *(uint32_t*)0x20000408 = 0;
  *(uint32_t*)0x2000040c = 0;
  *(uint8_t*)0x20000410 = 0;
  *(uint8_t*)0x20000411 = 0;
  *(uint16_t*)0x20000412 = 0;
  *(uint32_t*)0x20000414 = r[3];
  *(uint16_t*)0x20000418 = 0;
  *(uint16_t*)0x2000041a = 1;
  *(uint16_t*)0x2000041c = 0;
  *(uint16_t*)0x2000041e = 0;
  *(uint16_t*)0x20000420 = 0xf;
  *(uint16_t*)0x20000422 = 0;
  *(uint16_t*)0x20000424 = 0xa;
  *(uint16_t*)0x20000426 = 1;
  memcpy((void*)0x20000428, "basic\000", 6);
  *(uint16_t*)0x20000430 = 0xc0;
  *(uint16_t*)0x20000432 = 2;
  *(uint16_t*)0x20000434 = 0x60;
  STORE_BY_BITMASK(uint16_t, , 0x20000436, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000437, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000437, 1, 7, 1);
  *(uint16_t*)0x20000438 = 8;
  *(uint16_t*)0x2000043a = 1;
  *(uint16_t*)0x2000043c = 0x1e;
  *(uint16_t*)0x2000043e = 0;
  *(uint16_t*)0x20000440 = 8;
  *(uint16_t*)0x20000442 = 1;
  *(uint16_t*)0x20000444 = 4;
  *(uint16_t*)0x20000446 = 0;
  *(uint16_t*)0x20000448 = 8;
  *(uint16_t*)0x2000044a = 1;
  *(uint16_t*)0x2000044c = 3;
  *(uint16_t*)0x2000044e = 0;
  *(uint16_t*)0x20000450 = 0x2c;
  STORE_BY_BITMASK(uint16_t, , 0x20000452, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000453, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000453, 1, 7, 1);
  *(uint16_t*)0x20000454 = 0x14;
  STORE_BY_BITMASK(uint16_t, , 0x20000456, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000457, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000457, 0, 7, 1);
  *(uint16_t*)0x20000458 = 0x6722;
  *(uint16_t*)0x2000045a = 7;
  *(uint16_t*)0x2000045c = 0x401;
  *(uint16_t*)0x2000045e = 0;
  STORE_BY_BITMASK(uint32_t, , 0x20000460, 1, 0, 29);
  STORE_BY_BITMASK(uint32_t, , 0x20000460, 1, 29, 1);
  STORE_BY_BITMASK(uint32_t, , 0x20000460, 1, 30, 1);
  STORE_BY_BITMASK(uint32_t, , 0x20000460, 1, 31, 1);
  STORE_BY_BITMASK(uint32_t, , 0x20000464, 0, 0, 29);
  STORE_BY_BITMASK(uint32_t, , 0x20000464, 1, 29, 1);
  STORE_BY_BITMASK(uint32_t, , 0x20000464, 0, 30, 1);
  STORE_BY_BITMASK(uint32_t, , 0x20000464, 1, 31, 1);
  *(uint16_t*)0x20000468 = 0x14;
  STORE_BY_BITMASK(uint16_t, , 0x2000046a, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000046b, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000046b, 0, 7, 1);
  *(uint16_t*)0x2000046c = 0;
  *(uint16_t*)0x2000046e = 2;
  *(uint16_t*)0x20000470 = 0x8000;
  *(uint16_t*)0x20000472 = 0;
  *(uint32_t*)0x20000474 = 9;
  STORE_BY_BITMASK(uint16_t, , 0x20000478, 0, 0, 12);
  STORE_BY_BITMASK(uint8_t, , 0x20000479, 2, 4, 4);
  *(uint16_t*)0x2000047c = 8;
  *(uint16_t*)0x2000047e = 1;
  *(uint16_t*)0x20000480 = 0x400;
  *(uint16_t*)0x20000482 = 0;
  *(uint16_t*)0x20000484 = 8;
  *(uint16_t*)0x20000486 = 1;
  *(uint16_t*)0x20000488 = 0x576a;
  *(uint16_t*)0x2000048a = 0;
  *(uint16_t*)0x2000048c = 8;
  *(uint16_t*)0x2000048e = 1;
  *(uint16_t*)0x20000490 = 2;
  *(uint16_t*)0x20000492 = 0;
  *(uint16_t*)0x20000494 = 0x5c;
  *(uint16_t*)0x20000496 = 3;
  *(uint16_t*)0x20000498 = 0x58;
  STORE_BY_BITMASK(uint16_t, , 0x2000049a, 0x13, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000049b, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000049b, 0, 7, 1);
  *(uint16_t*)0x2000049c = 0xb;
  *(uint16_t*)0x2000049e = 1;
  memcpy((void*)0x200004a0, "mirred\000", 7);
  *(uint16_t*)0x200004a8 = 0x44;
  STORE_BY_BITMASK(uint16_t, , 0x200004aa, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200004ab, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200004ab, 1, 7, 1);
  *(uint16_t*)0x200004ac = 0x20;
  *(uint16_t*)0x200004ae = 2;
  *(uint32_t*)0x200004b0 = 7;
  *(uint32_t*)0x200004b4 = 0x20;
  *(uint32_t*)0x200004b8 = 5;
  *(uint32_t*)0x200004bc = 4;
  *(uint32_t*)0x200004c0 = 1;
  *(uint32_t*)0x200004c4 = 2;
  *(uint32_t*)0x200004c8 = 0;
  *(uint16_t*)0x200004cc = 0x20;
  *(uint16_t*)0x200004ce = 2;
  *(uint32_t*)0x200004d0 = 2;
  *(uint32_t*)0x200004d4 = 0xffff;
  *(uint32_t*)0x200004d8 = 0x10000000;
  *(uint32_t*)0x200004dc = 0x101;
  *(uint32_t*)0x200004e0 = 0x615;
  *(uint32_t*)0x200004e4 = 2;
  *(uint32_t*)0x200004e8 = r[3];
  *(uint16_t*)0x200004ec = 4;
  *(uint16_t*)0x200004ee = 6;
  *(uint64_t*)0x20000188 = 0xf0;
  *(uint64_t*)0x200001d8 = 1;
  *(uint64_t*)0x200001e0 = 0;
  *(uint64_t*)0x200001e8 = 0;
  *(uint32_t*)0x200001f0 = 0;
  syscall(__NR_sendmsg, r[0], 0x200001c0ul, 0ul);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0);
  do_sandbox_none();
  return 0;
}