// https://syzkaller.appspot.com/bug?id=7460667e2e38fd3c09ade09fea7c1dc0757b757d
// 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>

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 long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    unsigned long nb = a1;
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(nb % 10);
      nb /= 10;
    }
    return open(buf, a2 & ~O_CREAT, 0);
  }
}

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);
}

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

void loop(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$uinput arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 75 69 6e 70 75 74 00} (length 0xc)
  //    }
  //    flags: uinput_open_flags = 0x802 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_uinput
  memcpy((void*)0x200000000000, "/dev/uinput\000", 12);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000000ul, /*flags=O_RDWR_NONBLOCK*/ 0x802,
                /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$UI_DEV_SETUP arguments: [
  //    fd: fd_uinput (resource)
  //    cmd: const = 0x405c5503 (4 bytes)
  //    arg: ptr[in, uinput_setup] {
  //      uinput_setup {
  //        id: input_id {
  //          bustype: int16 = 0x0 (2 bytes)
  //          vendor: int16 = 0x4 (2 bytes)
  //          product: int16 = 0x0 (2 bytes)
  //          version: int16 = 0x9 (2 bytes)
  //        }
  //        name: buffer: {73 79 7a 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00} (length 0x50)
  //        ff_effects_max: int32 = 0x3c (4 bytes)
  //      }
  //    }
  //  ]
  *(uint16_t*)0x200000000280 = 0;
  *(uint16_t*)0x200000000282 = 4;
  *(uint16_t*)0x200000000284 = 0;
  *(uint16_t*)0x200000000286 = 9;
  memcpy((void*)0x200000000288,
         "syz1\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",
         80);
  *(uint32_t*)0x2000000002d8 = 0x3c;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x405c5503,
          /*arg=*/0x200000000280ul);
  //  ioctl$UI_SET_FFBIT arguments: [
  //    fd: fd_uinput (resource)
  //    cmd: const = 0x4004556b (4 bytes)
  //    arg: intptr = 0x51 (8 bytes)
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x4004556b, /*arg=*/0x51ul);
  //  ioctl$UI_DEV_CREATE arguments: [
  //    fd: fd_uinput (resource)
  //    cmd: const = 0x5501 (4 bytes)
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x5501, 0);
  //  syz_open_dev$evdev arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 69 6e 70 75 74 2f 65 76 65 6e 74 23 00}
  //      (length 0x12)
  //    }
  //    id: intptr = 0x72 (8 bytes)
  //    flags: open_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_evdev
  memcpy((void*)0x200000000100, "/dev/input/event#\000", 18);
  res = -1;
  res = syz_open_dev(/*dev=*/0x200000000100, /*id=*/0x72, /*flags=*/0);
  if (res != -1)
    r[1] = res;
  //  ioctl$EVIOCSFF arguments: [
  //    fd: fd_evdev (resource)
  //    cmd: const = 0x40304580 (4 bytes)
  //    arg: ptr[in, ff_effect] {
  //      ff_effect {
  //        type: ff_effect_type = 0x50 (2 bytes)
  //        id: int16 = 0xffff (2 bytes)
  //        dir: int16 = 0xd (2 bytes)
  //        trigger: ff_trigger {
  //          button: int16 = 0x2 (2 bytes)
  //          interv: int16 = 0xdac (2 bytes)
  //        }
  //        replay: ff_replay {
  //          len: int16 = 0x8000 (2 bytes)
  //          delay: int16 = 0x7 (2 bytes)
  //        }
  //        pad = 0x0 (2 bytes)
  //        u: union ff_effect_u {
  //          cond: array[ff_condition_effect] {
  //            ff_condition_effect {
  //              rsatur: int16 = 0xeeb (2 bytes)
  //              lsatur: int16 = 0x405 (2 bytes)
  //              rcoeff: int16 = 0x5 (2 bytes)
  //              lcoeff: int16 = 0x610b (2 bytes)
  //              dead: int16 = 0x8 (2 bytes)
  //              center: int16 = 0x2cf2 (2 bytes)
  //            }
  //            ff_condition_effect {
  //              rsatur: int16 = 0x2 (2 bytes)
  //              lsatur: int16 = 0x2 (2 bytes)
  //              rcoeff: int16 = 0x5 (2 bytes)
  //              lcoeff: int16 = 0xfff9 (2 bytes)
  //              dead: int16 = 0x6 (2 bytes)
  //              center: int16 = 0x3b7e (2 bytes)
  //            }
  //          }
  //        }
  //      }
  //    }
  //  ]
  *(uint16_t*)0x200000000500 = 0x50;
  *(uint16_t*)0x200000000502 = -1;
  *(uint16_t*)0x200000000504 = 0xd;
  *(uint16_t*)0x200000000506 = 2;
  *(uint16_t*)0x200000000508 = 0xdac;
  *(uint16_t*)0x20000000050a = 0x8000;
  *(uint16_t*)0x20000000050c = 7;
  *(uint16_t*)0x200000000510 = 0xeeb;
  *(uint16_t*)0x200000000512 = 0x405;
  *(uint16_t*)0x200000000514 = 5;
  *(uint16_t*)0x200000000516 = 0x610b;
  *(uint16_t*)0x200000000518 = 8;
  *(uint16_t*)0x20000000051a = 0x2cf2;
  *(uint16_t*)0x20000000051c = 2;
  *(uint16_t*)0x20000000051e = 2;
  *(uint16_t*)0x200000000520 = 5;
  *(uint16_t*)0x200000000522 = 0xfff9;
  *(uint16_t*)0x200000000524 = 6;
  *(uint16_t*)0x200000000526 = 0x3b7e;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x40304580,
          /*arg=*/0x200000000500ul);
}
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;
  do_sandbox_none();
  return 0;
}