// https://syzkaller.appspot.com/bug?id=524be83fa28f8e505866554a99eebc187fda36bc
// 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_bpf
#define __NR_bpf 321
#endif

#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_gadgetfs();
static void setup_binderfs();
static void setup_fusectl();
static void sandbox_common_mount_tmpfs(void)
{
  write_file("/proc/sys/fs/mount-max", "100000");
  if (mkdir("./syz-tmp", 0777))
    exit(1);
  if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot", 0777))
    exit(1);
  if (mkdir("./syz-tmp/newroot/dev", 0700))
    exit(1);
  unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/proc", 0700))
    exit(1);
  if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/selinux", 0700))
    exit(1);
  const char* selinux_path = "./syz-tmp/newroot/selinux";
  if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) {
    if (errno != ENOENT)
      exit(1);
    if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) &&
        errno != ENOENT)
      exit(1);
  }
  if (mkdir("./syz-tmp/newroot/sys", 0700))
    exit(1);
  if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL))
    exit(1);
  if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/proc/sys/fs/binfmt_misc",
            "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags,
            NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/newroot/syz-inputs", 0700))
    exit(1);
  if (mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL,
            bind_mount_flags | MS_RDONLY, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/pivot", 0777))
    exit(1);
  if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
    if (chdir("./syz-tmp"))
      exit(1);
  } else {
    if (chdir("/"))
      exit(1);
    if (umount2("./pivot", MNT_DETACH))
      exit(1);
  }
  if (chroot("./newroot"))
    exit(1);
  if (chdir("/"))
    exit(1);
  setup_gadgetfs();
  setup_binderfs();
  setup_fusectl();
}

static void setup_gadgetfs()
{
  if (mkdir("/dev/gadgetfs", 0777)) {
  }
  if (mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL)) {
  }
}

static void setup_fusectl()
{
  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);
  if (getppid() == 1)
    exit(1);
  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);
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  sandbox_common_mount_tmpfs();
  loop();
  exit(1);
}

static const char* setup_usb()
{
  if (chmod("/dev/raw-gadget", 0666))
    return "failed to chmod /dev/raw-gadget";
  return NULL;
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void loop(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  *(uint32_t*)0x2000000002c0 = 0x1b;
  *(uint32_t*)0x2000000002c4 = 0;
  *(uint32_t*)0x2000000002c8 = 0;
  *(uint32_t*)0x2000000002cc = 0x8000;
  *(uint32_t*)0x2000000002d0 = 0;
  *(uint32_t*)0x2000000002d4 = -1;
  *(uint32_t*)0x2000000002d8 = 0;
  memset((void*)0x2000000002dc, 0, 16);
  *(uint32_t*)0x2000000002ec = 0;
  *(uint32_t*)0x2000000002f0 = -1;
  *(uint32_t*)0x2000000002f4 = 0;
  *(uint32_t*)0x2000000002f8 = 0;
  *(uint32_t*)0x2000000002fc = 0;
  *(uint64_t*)0x200000000300 = 0;
  *(uint32_t*)0x200000000308 = 0;
  *(uint32_t*)0x20000000030c = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x2000000002c0ul, /*size=*/0x48ul);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x200000000380 = 0x1f;
  *(uint32_t*)0x200000000384 = 0xd;
  *(uint64_t*)0x200000000388 = 0x200000000100;
  *(uint8_t*)0x200000000100 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x200000000101, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000101, 0, 4, 4);
  *(uint16_t*)0x200000000102 = 0;
  *(uint32_t*)0x200000000104 = 0xfffffffc;
  *(uint8_t*)0x200000000108 = 0;
  *(uint8_t*)0x200000000109 = 0;
  *(uint16_t*)0x20000000010a = 0;
  *(uint32_t*)0x20000000010c = 7;
  *(uint8_t*)0x200000000110 = 0x85;
  *(uint8_t*)0x200000000111 = 0;
  *(uint16_t*)0x200000000112 = 0;
  *(uint32_t*)0x200000000114 = 0x11;
  *(uint8_t*)0x200000000118 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x200000000119, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000119, 1, 4, 4);
  *(uint16_t*)0x20000000011a = 0;
  *(uint32_t*)0x20000000011c = r[0];
  *(uint8_t*)0x200000000120 = 0;
  *(uint8_t*)0x200000000121 = 0;
  *(uint16_t*)0x200000000122 = 0;
  *(uint32_t*)0x200000000124 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000128, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000128, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000128, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000129, 8, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000129, 0, 4, 4);
  *(uint16_t*)0x20000000012a = 0;
  *(uint32_t*)0x20000000012c = 0x20000002;
  STORE_BY_BITMASK(uint8_t, , 0x200000000130, 3, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000130, 3, 3, 2);
  STORE_BY_BITMASK(uint8_t, , 0x200000000130, 3, 5, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000131, 0xa, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000131, 8, 4, 4);
  *(uint16_t*)0x200000000132 = 0xfff8;
  *(uint32_t*)0x200000000134 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000138, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000138, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000138, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000139, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000139, 0xa, 4, 4);
  *(uint16_t*)0x20000000013a = 0;
  *(uint32_t*)0x20000000013c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000140, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000140, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000140, 0, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000141, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000141, 0, 4, 4);
  *(uint16_t*)0x200000000142 = 0;
  *(uint32_t*)0x200000000144 = 0xfffffff8;
  STORE_BY_BITMASK(uint8_t, , 0x200000000148, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000148, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000148, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000149, 3, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000149, 0, 4, 4);
  *(uint16_t*)0x20000000014a = 0;
  *(uint32_t*)0x20000000014c = 8;
  STORE_BY_BITMASK(uint8_t, , 0x200000000150, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000150, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000150, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000151, 4, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000151, 0, 4, 4);
  *(uint16_t*)0x200000000152 = 0;
  *(uint32_t*)0x200000000154 = 1;
  *(uint8_t*)0x200000000158 = 0x85;
  *(uint8_t*)0x200000000159 = 0;
  *(uint16_t*)0x20000000015a = 0;
  *(uint32_t*)0x20000000015c = 0xa6;
  *(uint8_t*)0x200000000160 = 0x95;
  *(uint8_t*)0x200000000161 = 0;
  *(uint16_t*)0x200000000162 = 0;
  *(uint32_t*)0x200000000164 = 0;
  *(uint64_t*)0x200000000390 = 0x2000000000c0;
  memcpy((void*)0x2000000000c0, "GPL\000", 4);
  *(uint32_t*)0x200000000398 = 0;
  *(uint32_t*)0x20000000039c = 0;
  *(uint64_t*)0x2000000003a0 = 0;
  *(uint32_t*)0x2000000003a8 = 0;
  *(uint32_t*)0x2000000003ac = 0x34;
  memset((void*)0x2000000003b0, 0, 16);
  *(uint32_t*)0x2000000003c0 = 0;
  *(uint32_t*)0x2000000003c4 = 0;
  *(uint32_t*)0x2000000003c8 = -1;
  *(uint32_t*)0x2000000003cc = 8;
  *(uint64_t*)0x2000000003d0 = 0;
  *(uint32_t*)0x2000000003d8 = 0;
  *(uint32_t*)0x2000000003dc = 0x10;
  *(uint64_t*)0x2000000003e0 = 0;
  *(uint32_t*)0x2000000003e8 = 0;
  *(uint32_t*)0x2000000003ec = 0;
  *(uint32_t*)0x2000000003f0 = 0;
  *(uint32_t*)0x2000000003f4 = 0;
  *(uint64_t*)0x2000000003f8 = 0;
  *(uint64_t*)0x200000000400 = 0;
  *(uint32_t*)0x200000000408 = 0x10;
  *(uint32_t*)0x20000000040c = 0xfff;
  *(uint32_t*)0x200000000410 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000380ul, /*size=*/0x94ul);
  if (res != -1)
    r[1] = res;
  *(uint32_t*)0x200000000500 = r[1];
  *(uint32_t*)0x200000000504 = 0;
  *(uint32_t*)0x200000000508 = 0;
  *(uint32_t*)0x20000000050c = 0;
  *(uint64_t*)0x200000000510 = 0;
  *(uint64_t*)0x200000000518 = 0;
  *(uint32_t*)0x200000000520 = 0;
  *(uint32_t*)0x200000000524 = 0;
  *(uint32_t*)0x200000000528 = 0;
  *(uint32_t*)0x20000000052c = 0;
  *(uint64_t*)0x200000000530 = 0;
  *(uint64_t*)0x200000000538 = 0;
  *(uint32_t*)0x200000000540 = 0;
  *(uint32_t*)0x200000000544 = 0;
  *(uint32_t*)0x200000000548 = 0;
  syscall(__NR_bpf, /*cmd=*/0xaul, /*arg=*/0x200000000500ul, /*size=*/0x48ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  if ((reason = setup_usb()))
    printf("the reproducer may not work as expected: USB injection setup "
           "failed: %s\n",
           reason);
  do_sandbox_none();
  return 0;
}