// https://syzkaller.appspot.com/bug?id=80ffd087a886df22d21a44af2c6809a5d3ff2d9b
// 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>

#ifndef __NR_getsockname
#define __NR_getsockname 204
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_sendmsg
#define __NR_sendmsg 211
#endif
#ifndef __NR_socket
#define __NR_socket 198
#endif

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 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 = 128 << 20;
  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);
}

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

void loop(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/0x803ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  *(uint64_t*)0x200004c0 = 0;
  *(uint32_t*)0x200004c8 = 0;
  *(uint64_t*)0x200004d0 = 0x20000480;
  *(uint64_t*)0x20000480 = 0;
  *(uint64_t*)0x20000488 = 0x92;
  *(uint64_t*)0x200004d8 = 1;
  *(uint64_t*)0x200004e0 = 0;
  *(uint64_t*)0x200004e8 = 0;
  *(uint32_t*)0x200004f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200004c0ul, /*f=*/0ul);
  *(uint32_t*)0x20000000 = 0xa;
  res = syscall(__NR_getsockname, /*fd=*/r[1], /*addr=*/0x20000100ul,
                /*addrlen=*/0x20000000ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x20000104;
  *(uint64_t*)0x200007c0 = 0;
  *(uint32_t*)0x200007c8 = 0;
  *(uint64_t*)0x200007d0 = 0x20000180;
  *(uint64_t*)0x20000180 = 0x20000580;
  *(uint32_t*)0x20000580 = 0xdc;
  *(uint16_t*)0x20000584 = 0x24;
  *(uint16_t*)0x20000586 = 0xe0b;
  *(uint32_t*)0x20000588 = 0;
  *(uint32_t*)0x2000058c = 0;
  *(uint8_t*)0x20000590 = 0;
  *(uint8_t*)0x20000591 = 0;
  *(uint16_t*)0x20000592 = 0;
  *(uint32_t*)0x20000594 = r[2];
  *(uint16_t*)0x20000598 = 0;
  *(uint16_t*)0x2000059a = 0;
  *(uint16_t*)0x2000059c = -1;
  *(uint16_t*)0x2000059e = -1;
  *(uint16_t*)0x200005a0 = 0;
  *(uint16_t*)0x200005a2 = 0;
  *(uint16_t*)0x200005a4 = 0xa;
  *(uint16_t*)0x200005a6 = 1;
  memcpy((void*)0x200005a8, "netem\000", 6);
  *(uint16_t*)0x200005b0 = 0xac;
  *(uint16_t*)0x200005b2 = 2;
  *(uint32_t*)0x200005b4 = 0;
  *(uint32_t*)0x200005b8 = 8;
  *(uint32_t*)0x200005bc = 0;
  *(uint32_t*)0x200005c0 = 0;
  *(uint32_t*)0x200005c4 = 0;
  *(uint32_t*)0x200005c8 = 0;
  *(uint16_t*)0x200005cc = 0xc;
  *(uint16_t*)0x200005ce = 0xa;
  *(uint64_t*)0x200005d0 = 0xffffffff;
  *(uint16_t*)0x200005d8 = 0xc;
  *(uint16_t*)0x200005da = 8;
  *(uint64_t*)0x200005dc = 0x654534bf5327d02e;
  *(uint16_t*)0x200005e4 = 0x14;
  *(uint16_t*)0x200005e6 = 6;
  *(uint32_t*)0x200005e8 = 0xe49a;
  *(uint32_t*)0x200005ec = 0;
  *(uint32_t*)0x200005f0 = 2;
  *(uint32_t*)0x200005f4 = 0;
  *(uint16_t*)0x200005f8 = 0x41;
  *(uint16_t*)0x200005fa = 2;
  memcpy((void*)0x200005fc,
         "\x83\xa3\x45\x0b\xf7\x4b\xc0\x40\x64\x2d\xfa\x5e\x6f\x37\xee\x6c\x96"
         "\xef\xd7\xb1\xfc\x04\x08\xf3\x1d\xee\xe1\x92\xac\xc7\xc3\x8f\xc8\xd4"
         "\xbd\x50\x3e\xa1\x8e\xc4\xb8\xd3\xd7\x49\xff\x73\x4b\x0d\x10\xb3\xa5"
         "\x6f\x0b\xee\x67\x9c\xdf\xe4\x34\x3e\x34",
         61);
  *(uint16_t*)0x2000063c = 0xc;
  *(uint16_t*)0x2000063e = 0xb;
  *(uint64_t*)0x20000640 = 3;
  *(uint16_t*)0x20000648 = 0x14;
  *(uint16_t*)0x2000064a = 6;
  *(uint32_t*)0x2000064c = 0xff;
  *(uint32_t*)0x20000650 = 5;
  *(uint32_t*)0x20000654 = 5;
  *(uint32_t*)0x20000658 = 3;
  *(uint64_t*)0x20000188 = 0xdc;
  *(uint64_t*)0x200007d8 = 1;
  *(uint64_t*)0x200007e0 = 0;
  *(uint64_t*)0x200007e8 = 0;
  *(uint32_t*)0x200007f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200007c0ul, /*f=*/0ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  do_sandbox_none();
  return 0;
}