// https://syzkaller.appspot.com/bug?id=91321d64651784af4a63f05a545a7737bde6913e
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.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;
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void loop(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 7; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

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

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  openat$dm_control arguments: [
    //    fd: const = 0xffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2f 64 65 76 2f 6d 61 70 70 65 72 2f 63 6f 6e 74 72 6f 6c
    //      00} (length 0x14)
    //    }
    //    flags: open_flags = 0x2 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_dm_ctl
    memcpy((void*)0x2000000001c0, "/dev/mapper/control\000", 20);
    res = syscall(__NR_openat, /*fd=*/0xffffff9cul, /*file=*/0x2000000001c0ul,
                  /*flags=O_RDWR*/ 2, /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  ioctl$DM_DEV_CREATE arguments: [
    //    fd: fd_dm_ctl (resource)
    //    cmd: const = 0xc138fd03 (4 bytes)
    //    arg: ptr[inout, dm_ioctl_t[dm_id_create, void, const[0, int32],
    //    const[0, int32]]] {
    //      dm_ioctl_t[dm_id_create, void, const[0, int32], const[0, int32]] {
    //        version_major: const = 0x4 (4 bytes)
    //        version_minor: const = 0x0 (4 bytes)
    //        version_patch: const = 0x0 (4 bytes)
    //        data_size: bytesize = 0x138 (4 bytes)
    //        data_start: offsetof = 0x138 (4 bytes)
    //        target_count: const = 0x0 (4 bytes)
    //        open_count: const = 0x0 (4 bytes)
    //        flags: dm_ioctl_flags = 0x0 (4 bytes)
    //        event_nr: const = 0x0 (4 bytes)
    //        padding: const = 0x0 (4 bytes)
    //        id: dm_id_create {
    //          dev: dm_dev_number (resource)
    //          name: dm_dev_name {
    //            prefix: buffer: {73 79 7a} (length 0x3)
    //            proc: proc = 0x0 (1 bytes)
    //            slot: buffer: {31 00} (length 0x2)
    //            pad = 0x0 (122 bytes)
    //          }
    //          uuid: union dm_dev_uuid_opt {
    //            none: const = 0x0 (1 bytes)
    //          }
    //        }
    //        data: buffer: {} (length 0x0)
    //      }
    //    }
    //  ]
    *(uint32_t*)0x200000000200 = 4;
    *(uint32_t*)0x200000000204 = 0;
    *(uint32_t*)0x200000000208 = 0;
    *(uint32_t*)0x20000000020c = 0x138;
    *(uint32_t*)0x200000000210 = 0x138;
    *(uint32_t*)0x200000000214 = 0;
    *(uint32_t*)0x200000000218 = 0;
    *(uint32_t*)0x20000000021c = 0;
    *(uint32_t*)0x200000000220 = 0;
    *(uint32_t*)0x200000000224 = 0;
    memcpy((void*)0x200000000230, "syz", 3);
    *(uint8_t*)0x200000000233 = 0x61;
    memcpy((void*)0x200000000234, "1\000", 2);
    *(uint8_t*)0x2000000002b0 = 0;
    res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd03,
                  /*arg=*/0x200000000200ul);
    if (res != -1)
      r[1] = *(uint64_t*)0x200000000228;
    break;
  case 2:
    //  ioctl$DM_TABLE_LOAD arguments: [
    //    fd: fd_dm_ctl (resource)
    //    cmd: const = 0xc138fd09 (4 bytes)
    //    arg: ptr[inout, dm_ioctl_t[dm_id_lookup, array[dm_target, 1],
    //    len[data, int32], const[0, int32]]] {
    //      dm_ioctl_t[dm_id_lookup, array[dm_target, 1], len[data, int32],
    //      const[0, int32]] {
    //        version_major: const = 0x4 (4 bytes)
    //        version_minor: const = 0x0 (4 bytes)
    //        version_patch: const = 0x0 (4 bytes)
    //        data_size: bytesize = 0x1d8 (4 bytes)
    //        data_start: offsetof = 0x138 (4 bytes)
    //        target_count: len = 0x1 (4 bytes)
    //        open_count: const = 0x0 (4 bytes)
    //        flags: dm_ioctl_flags = 0x0 (4 bytes)
    //        event_nr: const = 0x0 (4 bytes)
    //        padding: const = 0x0 (4 bytes)
    //        id: union dm_id_lookup {
    //          by_name: dm_id_by_name {
    //            dev: dm_dev_number (resource)
    //            name: dm_dev_name {
    //              prefix: buffer: {73 79 7a} (length 0x3)
    //              proc: proc = 0x0 (1 bytes)
    //              slot: buffer: {31 00} (length 0x2)
    //              pad = 0x0 (122 bytes)
    //            }
    //            pad = 0x0 (136 bytes)
    //          }
    //        }
    //        data: array[dm_target] {
    //          union dm_target {
    //            crypt: dm_target_spec_t[dm_target_crypt, dm_crypt_params] {
    //              sector_start: const = 0x0 (8 bytes)
    //              length: dm_lengths = 0x2000 (8 bytes)
    //              status: const = 0x0 (4 bytes)
    //              next: bytesize = 0xa0 (4 bytes)
    //              target_type: buffer: {63 72 79 70 74 00 00 00 00 00 00 00 00
    //              00 00 00} (length 0x10) params: dm_crypt_params {
    //                cipher: buffer: {61 65 73 2d 78 74 73 2d 70 6c 61 69 6e 36
    //                34} (length 0xf) sp0: const = 0x20 (1 bytes) key: union
    //                dm_crypt_key {
    //                  fixed: buffer: {30 31 32 33 34 35 36 37 38 39 61 62 63
    //                  64 65 66 30 31 32 33 34 35 36 37 38 39 61 62 63 64 65 66
    //                  30 31 32 33 34 35 36 37 38 39 61 62 63 64 65 66 30 31 32
    //                  33 34 35 36 37 38 39 61 62 63 64 65 66} (length 0x40)
    //                }
    //                sp1: const = 0x20 (1 bytes)
    //                iv_off: buffer: {30} (length 0x1)
    //                sp2: const = 0x20 (1 bytes)
    //                dev: dm_dev_off {
    //                  dev: union dm_dev {
    //                    ram: dm_dev_proc_t["/dev/ram", 2] {
    //                      prefix: buffer: {2f 64 65 76 2f 72 61 6d} (length
    //                      0x8) id: proc = 0x1 (1 bytes)
    //                    }
    //                  }
    //                  sp: const = 0x20 (1 bytes)
    //                  off: buffer: {30} (length 0x1)
    //                }
    //                opts: buffer: {20 31 20 69 6e 74 65 67 72 69 74 79 3a 38
    //                3a 6e 6f 6e 65} (length 0x13)
    //              }
    //              z: const = 0x0 (1 bytes)
    //            }
    //          }
    //        }
    //      }
    //    }
    //  ]
    *(uint32_t*)0x200000000840 = 4;
    *(uint32_t*)0x200000000844 = 0;
    *(uint32_t*)0x200000000848 = 0;
    *(uint32_t*)0x20000000084c = 0x1d8;
    *(uint32_t*)0x200000000850 = 0x138;
    *(uint32_t*)0x200000000854 = 1;
    *(uint32_t*)0x200000000858 = 0;
    *(uint32_t*)0x20000000085c = 0;
    *(uint32_t*)0x200000000860 = 0;
    *(uint32_t*)0x200000000864 = 0;
    memcpy((void*)0x200000000870, "syz", 3);
    *(uint8_t*)0x200000000873 = 0x61;
    memcpy((void*)0x200000000874, "1\000", 2);
    *(uint64_t*)0x200000000978 = 0;
    *(uint64_t*)0x200000000980 = 0x2000;
    *(uint32_t*)0x200000000988 = 0;
    *(uint32_t*)0x20000000098c = 0xa0;
    memcpy((void*)0x200000000990,
           "crypt\000\000\000\000\000\000\000\000\000\000\000", 16);
    memcpy((void*)0x2000000009a0, "aes-xts-plain64", 15);
    *(uint8_t*)0x2000000009af = 0x20;
    memcpy((void*)0x2000000009b0,
           "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
           64);
    *(uint8_t*)0x2000000009f0 = 0x20;
    memset((void*)0x2000000009f1, 48, 1);
    *(uint8_t*)0x2000000009f2 = 0x20;
    memcpy((void*)0x2000000009f3, "/dev/ram", 8);
    *(uint8_t*)0x2000000009fb = 0x31;
    *(uint8_t*)0x2000000009fc = 0x20;
    memset((void*)0x2000000009fd, 48, 1);
    memcpy((void*)0x2000000009fe, " 1 integrity:8:none", 19);
    *(uint8_t*)0x200000000a11 = 0;
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd09,
            /*arg=*/0x200000000840ul);
    break;
  case 3:
    //  ioctl$DM_DEV_SUSPEND arguments: [
    //    fd: fd_dm_ctl (resource)
    //    cmd: const = 0xc138fd06 (4 bytes)
    //    arg: ptr[inout, dm_ioctl_t[dm_id_lookup, void, const[0, int32],
    //    const[0, int32]]] {
    //      dm_ioctl_t[dm_id_lookup, void, const[0, int32], const[0, int32]] {
    //        version_major: const = 0x4 (4 bytes)
    //        version_minor: const = 0x0 (4 bytes)
    //        version_patch: const = 0x0 (4 bytes)
    //        data_size: bytesize = 0x138 (4 bytes)
    //        data_start: offsetof = 0x138 (4 bytes)
    //        target_count: const = 0x0 (4 bytes)
    //        open_count: const = 0x0 (4 bytes)
    //        flags: dm_ioctl_flags = 0x0 (4 bytes)
    //        event_nr: const = 0x0 (4 bytes)
    //        padding: const = 0x0 (4 bytes)
    //        id: union dm_id_lookup {
    //          by_name: dm_id_by_name {
    //            dev: dm_dev_number (resource)
    //            name: dm_dev_name {
    //              prefix: buffer: {73 79 7a} (length 0x3)
    //              proc: proc = 0x0 (1 bytes)
    //              slot: buffer: {31 00} (length 0x2)
    //              pad = 0x0 (122 bytes)
    //            }
    //            pad = 0x0 (136 bytes)
    //          }
    //        }
    //        data: buffer: {} (length 0x0)
    //      }
    //    }
    //  ]
    *(uint32_t*)0x200000000500 = 4;
    *(uint32_t*)0x200000000504 = 0;
    *(uint32_t*)0x200000000508 = 0;
    *(uint32_t*)0x20000000050c = 0x138;
    *(uint32_t*)0x200000000510 = 0x138;
    *(uint32_t*)0x200000000514 = 0;
    *(uint32_t*)0x200000000518 = 0;
    *(uint32_t*)0x20000000051c = 0;
    *(uint32_t*)0x200000000520 = 0;
    *(uint32_t*)0x200000000524 = 0;
    memcpy((void*)0x200000000530, "syz", 3);
    *(uint8_t*)0x200000000533 = 0x61;
    memcpy((void*)0x200000000534, "1\000", 2);
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc138fd06,
            /*arg=*/0x200000000500ul);
    break;
  case 4:
    //  mknodat$dm arguments: [
    //    dirfd: const = 0xffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 64 6d 30 00} (length 0x6)
    //    }
    //    mode: const = 0x6180 (8 bytes)
    //    dev: dm_dev_number (resource)
    //  ]
    memcpy((void*)0x200000000640, "./dm0\000", 6);
    syscall(__NR_mknodat, /*dirfd=*/0xffffff9cul, /*file=*/0x200000000640ul,
            /*mode=*/0x6180ul, /*dev=*/r[1]);
    break;
  case 5:
    //  openat$dm_dev arguments: [
    //    fd: const = 0xffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 64 6d 30 00} (length 0x6)
    //    }
    //    flags: dm_open_flags = 0x2 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_dm
    memcpy((void*)0x200000000680, "./dm0\000", 6);
    res = syscall(__NR_openat, /*fd=*/0xffffff9cul, /*file=*/0x200000000680ul,
                  /*flags=O_RDWR*/ 2, /*mode=*/0);
    if (res != -1)
      r[2] = res;
    break;
  case 6:
    //  pwrite64 arguments: [
    //    fd: fd (resource)
    //    buf: ptr[in, buffer] {
    //      buffer: {01 02 03 04 05 06 07 08} (length 0x8)
    //    }
    //    count: len = 0x8 (8 bytes)
    //    pos: intptr = 0x0 (8 bytes)
    //  ]
    memcpy((void*)0x2000000006c0, "\x01\x02\x03\x04\x05\x06\x07\x08", 8);
    syscall(__NR_pwrite64, /*fd=*/r[2], /*buf=*/0x2000000006c0ul, /*count=*/8ul,
            /*pos=*/0ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*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=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}