// https://syzkaller.appspot.com/bug?id=dbcb39beb96c35c5b1f579ec77a4c121d60d21a0
// 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/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 < 6; 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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  socket$alg arguments: [
    //    domain: const = 0x26 (8 bytes)
    //    type: const = 0x5 (8 bytes)
    //    proto: const = 0x0 (4 bytes)
    //  ]
    //  returns sock_alg
    res = syscall(__NR_socket, /*domain=*/0x26ul, /*type=*/5ul, /*proto=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  bind$alg arguments: [
    //    fd: sock_alg (resource)
    //    addr: ptr[in, sockaddr_alg] {
    //      sockaddr_alg {
    //        family: const = 0x26 (2 bytes)
    //        type: buffer: {73 6b 63 69 70 68 65 72 00 00 00 00 00 00} (length
    //        0xe) feat: af_alg_type = 0x0 (4 bytes) mask: af_alg_type = 0x0 (4
    //        bytes) name: buffer: {65 63 62 28 64 65 73 33 5f 65 64 65 29 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 0x40)
    //      }
    //    }
    //    addrlen: len = 0x58 (8 bytes)
    //  ]
    *(uint16_t*)0x200000000000 = 0x26;
    memcpy((void*)0x200000000002, "skcipher\000\000\000\000\000\000", 14);
    *(uint32_t*)0x200000000010 = 0;
    *(uint32_t*)0x200000000014 = 0;
    memcpy(
        (void*)0x200000000018,
        "ecb(des3_ede)"
        "\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",
        64);
    syscall(__NR_bind, /*fd=*/r[0], /*addr=*/0x200000000000ul,
            /*addrlen=*/0x58ul);
    break;
  case 2:
    //  setsockopt$ALG_SET_KEY arguments: [
    //    fd: sock_alg (resource)
    //    level: const = 0x117 (4 bytes)
    //    opt: const = 0x1 (4 bytes)
    //    key: ptr[in, buffer] {
    //      buffer: {ad 56 b6 c5 82 0f ae 9d 6d cd 32 92 ea 54 c7 be ef 91 5d 56
    //      4c 90 c2 00} (length 0x18)
    //    }
    //    keylen: len = 0x18 (8 bytes)
    //  ]
    memcpy((void*)0x200000c18000,
           "\xad\x56\xb6\xc5\x82\x0f\xae\x9d\x6d\xcd\x32\x92\xea\x54\xc7\xbe"
           "\xef\x91\x5d\x56\x4c\x90\xc2\x00",
           24);
    syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0x117, /*opt=*/1,
            /*key=*/0x200000c18000ul, /*keylen=*/0x18ul);
    break;
  case 3:
    //  accept4 arguments: [
    //    fd: sock (resource)
    //    peer: nil
    //    peerlen: nil
    //    flags: accept_flags = 0x0 (8 bytes)
    //  ]
    //  returns sock
    res = syscall(__NR_accept4, /*fd=*/r[0], /*peer=*/0ul, /*peerlen=*/0ul,
                  /*flags=*/0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    //  sendmmsg$alg arguments: [
    //    fd: sock_algconn (resource)
    //    mmsg: ptr[in, array[msghdr_alg]] {
    //      array[msghdr_alg] {
    //        msghdr_alg {
    //          addr: const = 0x20000000 (8 bytes)
    //          addrlen: const = 0x0 (4 bytes)
    //          pad = 0x0 (4 bytes)
    //          vec: ptr[in, array[iovec[in, array[int8]]]] {
    //            array[iovec[in, array[int8]]] {
    //              iovec[in, array[int8]] {
    //                addr: ptr[in, buffer] {
    //                  buffer: {f7 8d 9c a3 8f ff 48 f3 be 52 16 34 48 41 2b
    //                  a8} (length 0x10)
    //                }
    //                len: len = 0xfffffe1a (8 bytes)
    //              }
    //            }
    //          }
    //          vlen: len = 0x1 (8 bytes)
    //          ctrl: ptr[in, array[cmsghdr_alg]] {
    //            array[cmsghdr_alg] {
    //              union cmsghdr_alg {
    //                op: cmsghdr_alg_op {
    //                  len: len = 0x18 (8 bytes)
    //                  level: const = 0x117 (4 bytes)
    //                  type: const = 0x3 (4 bytes)
    //                  op: alg_op_op = 0x0 (4 bytes)
    //                  pad = 0x0 (4 bytes)
    //                }
    //              }
    //            }
    //          }
    //          ctrllen: bytesize = 0x18 (8 bytes)
    //          f: send_flags = 0x0 (4 bytes)
    //          pad = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    vlen: len = 0x4924924924924b9 (8 bytes)
    //    f: send_flags = 0x0 (8 bytes)
    //  ]
    *(uint64_t*)0x200000000400 = 0x20000000;
    *(uint32_t*)0x200000000408 = 0;
    *(uint64_t*)0x200000000410 = 0x2000000002c0;
    *(uint64_t*)0x2000000002c0 = 0x200000000080;
    memcpy((void*)0x200000000080,
           "\xf7\x8d\x9c\xa3\x8f\xff\x48\xf3\xbe\x52\x16\x34\x48\x41\x2b\xa8",
           16);
    *(uint64_t*)0x2000000002c8 = 0xfffffe1a;
    *(uint64_t*)0x200000000418 = 1;
    *(uint64_t*)0x200000000420 = 0x200000000380;
    *(uint64_t*)0x200000000380 = 0x18;
    *(uint32_t*)0x200000000388 = 0x117;
    *(uint32_t*)0x20000000038c = 3;
    *(uint32_t*)0x200000000390 = 0;
    *(uint64_t*)0x200000000428 = 0x18;
    *(uint32_t*)0x200000000430 = 0;
    syscall(__NR_sendmmsg, /*fd=*/r[1], /*mmsg=*/0x200000000400ul,
            /*vlen=*/0x4924924924924b9ul, /*f=*/0ul);
    break;
  case 5:
    //  recvmsg$can_raw arguments: [
    //    fd: sock_can_raw (resource)
    //    msg: ptr[inout, recv_msghdr] {
    //      recv_msghdr {
    //        msg_name: nil
    //        msg_namelen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        msg_iov: ptr[in, array[iovec[out, array[int8]]]] {
    //          array[iovec[out, array[int8]]] {
    //            iovec[out, array[int8]] {
    //              addr: ptr[out, buffer] {
    //                buffer: (DirOut)
    //              }
    //              len: len = 0x1000 (8 bytes)
    //            }
    //          }
    //        }
    //        msg_iovlen: len = 0x1 (8 bytes)
    //        msg_control: nil
    //        msg_controllen: bytesize = 0x0 (8 bytes)
    //        msg_flags: const = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: recv_flags = 0x40000003 (8 bytes)
    //  ]
    *(uint64_t*)0x200000000600 = 0;
    *(uint32_t*)0x200000000608 = 0;
    *(uint64_t*)0x200000000610 = 0x200000000540;
    *(uint64_t*)0x200000000540 = 0x200000000780;
    *(uint64_t*)0x200000000548 = 0x1000;
    *(uint64_t*)0x200000000618 = 1;
    *(uint64_t*)0x200000000620 = 0;
    *(uint64_t*)0x200000000628 = 0;
    *(uint32_t*)0x200000000630 = 0;
    syscall(__NR_recvmsg, /*fd=*/r[1], /*msg=*/0x200000000600ul,
            /*f=MSG_PEEK|MSG_OOB|MSG_CMSG_CLOEXEC*/ 0x40000003ul, 0);
    break;
  }
}
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;
  loop();
  return 0;
}