// https://syzkaller.appspot.com/bug?id=b2c26e9e60a70de5dc7d929fd1e991ccbdefa9bc
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif
#ifndef __NR_io_uring_enter
#define __NR_io_uring_enter 426
#endif
#ifndef __NR_io_uring_setup
#define __NR_io_uring_setup 425
#endif

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 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;
}

#define SIZEOF_IO_URING_SQE 64
#define SIZEOF_IO_URING_CQE 16
#define SQ_HEAD_OFFSET 0
#define SQ_TAIL_OFFSET 64
#define SQ_RING_MASK_OFFSET 256
#define SQ_RING_ENTRIES_OFFSET 264
#define SQ_FLAGS_OFFSET 276
#define SQ_DROPPED_OFFSET 272
#define CQ_HEAD_OFFSET 128
#define CQ_TAIL_OFFSET 192
#define CQ_RING_MASK_OFFSET 260
#define CQ_RING_ENTRIES_OFFSET 268
#define CQ_RING_OVERFLOW_OFFSET 284
#define CQ_FLAGS_OFFSET 280
#define CQ_CQES_OFFSET 320

struct io_sqring_offsets {
  uint32_t head;
  uint32_t tail;
  uint32_t ring_mask;
  uint32_t ring_entries;
  uint32_t flags;
  uint32_t dropped;
  uint32_t array;
  uint32_t resv1;
  uint64_t resv2;
};

struct io_cqring_offsets {
  uint32_t head;
  uint32_t tail;
  uint32_t ring_mask;
  uint32_t ring_entries;
  uint32_t overflow;
  uint32_t cqes;
  uint64_t resv[2];
};

struct io_uring_params {
  uint32_t sq_entries;
  uint32_t cq_entries;
  uint32_t flags;
  uint32_t sq_thread_cpu;
  uint32_t sq_thread_idle;
  uint32_t features;
  uint32_t resv[4];
  struct io_sqring_offsets sq_off;
  struct io_cqring_offsets cq_off;
};

#define IORING_OFF_SQ_RING 0
#define IORING_OFF_SQES 0x10000000ULL
#define IORING_SETUP_SQE128 (1U << 10)
#define IORING_SETUP_CQE32 (1U << 11)

static long syz_io_uring_setup(volatile long a0, volatile long a1,
                               volatile long a2, volatile long a3)
{
  uint32_t entries = (uint32_t)a0;
  struct io_uring_params* setup_params = (struct io_uring_params*)a1;
  void** ring_ptr_out = (void**)a2;
  void** sqes_ptr_out = (void**)a3;
  setup_params->flags &= ~(IORING_SETUP_CQE32 | IORING_SETUP_SQE128);
  uint32_t fd_io_uring = syscall(__NR_io_uring_setup, entries, setup_params);
  uint32_t sq_ring_sz =
      setup_params->sq_off.array + setup_params->sq_entries * sizeof(uint32_t);
  uint32_t cq_ring_sz = setup_params->cq_off.cqes +
                        setup_params->cq_entries * SIZEOF_IO_URING_CQE;
  uint32_t ring_sz = sq_ring_sz > cq_ring_sz ? sq_ring_sz : cq_ring_sz;
  *ring_ptr_out =
      mmap(0, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE,
           fd_io_uring, IORING_OFF_SQ_RING);
  uint32_t sqes_sz = setup_params->sq_entries * SIZEOF_IO_URING_SQE;
  *sqes_ptr_out = mmap(0, sqes_sz, PROT_READ | PROT_WRITE,
                       MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQES);
  uint32_t* array =
      (uint32_t*)((uintptr_t)*ring_ptr_out + setup_params->sq_off.array);
  for (uint32_t index = 0; index < entries; index++)
    array[index] = index;
  return fd_io_uring;
}

static long syz_io_uring_submit(volatile long a0, volatile long a1,
                                volatile long a2)
{
  char* ring_ptr = (char*)a0;
  char* sqes_ptr = (char*)a1;
  char* sqe = (char*)a2;
  uint32_t sq_ring_mask = *(uint32_t*)(ring_ptr + SQ_RING_MASK_OFFSET);
  uint32_t* sq_tail_ptr = (uint32_t*)(ring_ptr + SQ_TAIL_OFFSET);
  uint32_t sq_tail = *sq_tail_ptr & sq_ring_mask;
  char* sqe_dest = sqes_ptr + sq_tail * SIZEOF_IO_URING_SQE;
  memcpy(sqe_dest, sqe, SIZEOF_IO_URING_SQE);
  uint32_t sq_tail_next = *sq_tail_ptr + 1;
  __atomic_store_n(sq_tail_ptr, sq_tail_next, __ATOMIC_RELEASE);
  return 0;
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[6] = {0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0x0,
                 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$nl_netfilter arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0xc (4 bytes)
  //  ]
  //  returns sock_nl_netfilter
  syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0xc);
  //  bpf$PROG_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
  //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
  //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
  //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
  //        type: bpf_prog_type = 0x10 (4 bytes)
  //        ninsn: bytesize8 = 0x4 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {b4 00 00 00 00 00 00 00 79 10 48 00 00 00 00
  //              00 61 04 00 00 00 00 00 00 95 00 00 00} (length 0x1c)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {47 50 4c 00} (length 0x4)
  //        }
  //        loglev: int32 = 0x2 (4 bytes)
  //        logsize: len = 0xfd90 (4 bytes)
  //        log: ptr[out, buffer] {
  //          buffer: (DirOut)
  //        }
  //        kern_version: bpf_kern_version = 0x0 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        union bpf_prog_attach_types {
  //          sk_msg: sk_msg_attach_types = 0x0 (4 bytes)
  //        }
  //        btf_fd: fd_btf (resource)
  //        func_info_rec_size: const = 0x8 (4 bytes)
  //        func_info: nil
  //        func_info_cnt: len = 0x0 (4 bytes)
  //        line_info_rec_size: const = 0x10 (4 bytes)
  //        line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: bpf_btf_id (resource)
  //        attach_prog_fd: fd_bpf_prog (resource)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x10 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x48 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x20000000e000 = 0x10;
  *(uint32_t*)0x20000000e004 = 4;
  *(uint64_t*)0x20000000e008 = 0x200000000040;
  memcpy((void*)0x200000000040,
         "\xb4\x00\x00\x00\x00\x00\x00\x00\x79\x10\x48\x00\x00\x00\x00\x00\x61"
         "\x04\x00\x00\x00\x00\x00\x00\x95\x00\x00\x00",
         28);
  *(uint64_t*)0x20000000e010 = 0x200000003ff6;
  memcpy((void*)0x200000003ff6, "GPL\000", 4);
  *(uint32_t*)0x20000000e018 = 2;
  *(uint32_t*)0x20000000e01c = 0xfd90;
  *(uint64_t*)0x20000000e020 = 0x20000000cf3d;
  *(uint32_t*)0x20000000e028 = 0;
  *(uint32_t*)0x20000000e02c = 0;
  memset((void*)0x20000000e030, 0, 16);
  *(uint32_t*)0x20000000e040 = 0;
  *(uint32_t*)0x20000000e044 = 0;
  *(uint32_t*)0x20000000e048 = -1;
  *(uint32_t*)0x20000000e04c = 8;
  *(uint64_t*)0x20000000e050 = 0;
  *(uint32_t*)0x20000000e058 = 0;
  *(uint32_t*)0x20000000e05c = 0x10;
  *(uint64_t*)0x20000000e060 = 0;
  *(uint32_t*)0x20000000e068 = 0;
  *(uint32_t*)0x20000000e06c = 0;
  *(uint32_t*)0x20000000e070 = -1;
  *(uint32_t*)0x20000000e074 = 0;
  *(uint64_t*)0x20000000e078 = 0;
  *(uint64_t*)0x20000000e080 = 0;
  *(uint32_t*)0x20000000e088 = 0x10;
  *(uint32_t*)0x20000000e08c = 0;
  *(uint32_t*)0x20000000e090 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000000e000ul, /*size=*/0x48ul);
  if (res != -1)
    r[0] = res;
  //  close arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_close, /*fd=*/r[0]);
  //  socketpair$unix arguments: [
  //    domain: const = 0x1 (8 bytes)
  //    type: unix_socket_type = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //    fds: ptr[out, unix_pair] {
  //      unix_pair {
  //        fd0: sock_unix (resource)
  //        fd1: sock_unix (resource)
  //      }
  //    }
  //  ]
  res = syscall(__NR_socketpair, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul,
                /*proto=*/0, /*fds=*/0x200000001540ul);
  if (res != -1)
    r[1] = *(uint32_t*)0x200000001544;
  //  bpf$MAP_CREATE arguments: [
  //    cmd: const = 0x0 (8 bytes)
  //    arg: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {0f 00 00 00 04 00 00 00 04 00 00 00 12} (length
  //          0xd)
  //        }
  //      }
  //    }
  //    size: len = 0x48 (8 bytes)
  //  ]
  //  returns fd_bpf_map
  memcpy((void*)0x200000000700,
         "\x0f\x00\x00\x00\x04\x00\x00\x00\x04\x00\x00\x00\x12", 13);
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200000000700ul, /*size=*/0x48ul);
  if (res != -1)
    r[2] = res;
  //  sendmsg$inet arguments: [
  //    fd: sock (resource)
  //    msg: ptr[in, msghdr_inet] {
  //      msghdr_inet {
  //        msg_name: nil
  //        msg_namelen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        msg_iov: ptr[in, array[iovec[in, array[int8]]]] {
  //          array[iovec[in, array[int8]]] {
  //            iovec[in, array[int8]] {
  //              addr: ptr[in, buffer] {
  //                buffer: {7d} (length 0x1)
  //              }
  //              len: len = 0x1 (8 bytes)
  //            }
  //          }
  //        }
  //        msg_iovlen: len = 0x1 (8 bytes)
  //        msg_control: nil
  //        msg_controllen: bytesize = 0x0 (8 bytes)
  //        msg_flags: const = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x804c8d5 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000300 = 0;
  *(uint32_t*)0x200000000308 = 0;
  *(uint64_t*)0x200000000310 = 0x200000000bc0;
  *(uint64_t*)0x200000000bc0 = 0x200000000780;
  memset((void*)0x200000000780, 125, 1);
  *(uint64_t*)0x200000000bc8 = 1;
  *(uint64_t*)0x200000000318 = 1;
  *(uint64_t*)0x200000000320 = 0;
  *(uint64_t*)0x200000000328 = 0;
  *(uint32_t*)0x200000000330 = 0;
  syscall(
      __NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000300ul,
      /*f=MSG_BATCH|MSG_PROBE|MSG_OOB|MSG_NOSIGNAL|MSG_MORE|MSG_EOR|0x8000844*/
      0x804c8d5ul);
  //  bpf$MAP_UPDATE_ELEM_TAIL_CALL arguments: [
  //    cmd: const = 0x2 (8 bytes)
  //    arg: ptr[inout, bpf_map_update_tail_call_arg] {
  //      bpf_map_update_tail_call_arg {
  //        map: tail_call_map_update {
  //          in: tail_call_map_fd (resource)
  //          out: tail_call_map (resource)
  //        }
  //        pad = 0x0 (4 bytes)
  //        key: ptr[in, const[0, const]] {
  //          const = 0x0 (4 bytes)
  //        }
  //        val: ptr[in, fd_bpf_prog] {
  //          fd_bpf_prog (resource)
  //        }
  //        flags: const = 0x0 (8 bytes)
  //      }
  //    }
  //    size: len = 0x20 (8 bytes)
  //  ]
  *(uint32_t*)0x2000000000c0 = r[2];
  *(uint64_t*)0x2000000000c8 = 0x200000000000;
  *(uint32_t*)0x200000000000 = 0;
  *(uint64_t*)0x2000000000d0 = 0x2000000002c0;
  *(uint32_t*)0x2000000002c0 = r[0];
  *(uint64_t*)0x2000000000d8 = 0;
  syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x2000000000c0ul, /*size=*/0x20ul);
  //  syz_io_uring_setup arguments: [
  //    entries: int32 = 0x9e (4 bytes)
  //    params: ptr[inout, io_uring_params] {
  //      io_uring_params {
  //        sq_entries: int32 = 0x0 (4 bytes)
  //        cq_entries: int32 = 0x5867 (4 bytes)
  //        flags: io_uring_setup_flags = 0x800 (4 bytes)
  //        sq_thread_cpu: int32 = 0xfffffffc (4 bytes)
  //        sq_thread_idle: int32 = 0x1bd (4 bytes)
  //        features: int32 = 0x0 (4 bytes)
  //        wq_fd: fd_io_uring (resource)
  //        resv: buffer: {00 00 00 00 00 00 00 00 00 00 00 00} (length 0xc)
  //        sq_off: array[int32] {
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //        }
  //        cq_off: array[int32] {
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    ring_ptr: ptr[out, ring_ptr] {
  //      ring_ptr (resource)
  //    }
  //    sqes_ptr: ptr[out, sqes_ptr] {
  //      sqes_ptr (resource)
  //    }
  //  ]
  //  returns fd_io_uring
  *(uint32_t*)0x200000000644 = 0x5867;
  *(uint32_t*)0x200000000648 = 0x800;
  *(uint32_t*)0x20000000064c = 0xfffffffc;
  *(uint32_t*)0x200000000650 = 0x1bd;
  *(uint32_t*)0x200000000658 = -1;
  memset((void*)0x20000000065c, 0, 12);
  res = -1;
  res = syz_io_uring_setup(/*entries=*/0x9e, /*params=*/0x200000000640,
                           /*ring_ptr=*/0x200000000040,
                           /*sqes_ptr=*/0x2000000001c0);
  if (res != -1) {
    r[3] = res;
    r[4] = *(uint64_t*)0x200000000040;
    r[5] = *(uint64_t*)0x2000000001c0;
  }
  //  syz_io_uring_submit arguments: [
  //    ring_ptr: ring_ptr (resource)
  //    sqes_ptr: sqes_ptr (resource)
  //    sqe: ptr[in, io_uring_sqe_u] {
  //      union io_uring_sqe_u {
  //        IORING_OP_READV: union io_uring_sqe_readv {
  //          pass_iovec: io_uring_sqe[IORING_OP_READV, flags[ioprio_priorities,
  //          int16], fd_or_fixed_fd_index, fileoff[int64], ptr[in,
  //          array[iovec_out]], len[addr, int32], flags[rwf_flags, int32],
  //          sqe_user_data_not_openat, personality_only_misc] {
  //            opcode: const = 0x1 (1 bytes)
  //            flags: iosqe_flags = 0x0 (1 bytes)
  //            ioprio: ioprio_priorities = 0x4007 (2 bytes)
  //            fd: union fd_or_fixed_fd_index {
  //              fd_index: int32 = 0x4 (4 bytes)
  //            }
  //            off: int64 = 0x0 (8 bytes)
  //            addr: ptr[in, array[iovec[out, array[int8]]]] {
  //              array[iovec[out, array[int8]]] {
  //                iovec[out, array[int8]] {
  //                  addr: ptr[out, buffer] {
  //                    buffer: (DirOut)
  //                  }
  //                  len: len = 0xd8 (8 bytes)
  //                }
  //              }
  //            }
  //            len: len = 0x1 (4 bytes)
  //            misc_flags: rwf_flags = 0x0 (4 bytes)
  //            user_data: sqe_user_data_not_openat = 0x0 (8 bytes)
  //            misc: personality_only_misc {
  //              buf_index_unused: const = 0x0 (2 bytes)
  //              ioring_personality_id: ioring_personality_id (resource)
  //              pad_unused: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //              00 00 00 00 00 00} (length 0x14)
  //            }
  //          }
  //        }
  //      }
  //    }
  //  ]
  *(uint8_t*)0x200000000200 = 1;
  *(uint8_t*)0x200000000201 = 0;
  *(uint16_t*)0x200000000202 = 0x4007;
  *(uint32_t*)0x200000000204 = 4;
  *(uint64_t*)0x200000000208 = 0;
  *(uint64_t*)0x200000000210 = 0x200000000100;
  *(uint64_t*)0x200000000100 = 0x200000001800;
  *(uint64_t*)0x200000000108 = 0xd8;
  *(uint32_t*)0x200000000218 = 1;
  *(uint32_t*)0x20000000021c = 0;
  *(uint64_t*)0x200000000220 = 0;
  *(uint16_t*)0x200000000228 = 0;
  *(uint16_t*)0x20000000022a = 0;
  memset((void*)0x20000000022c, 0, 20);
  syz_io_uring_submit(/*ring_ptr=*/r[4], /*sqes_ptr=*/r[5],
                      /*sqe=*/0x200000000200);
  //  io_uring_enter arguments: [
  //    fd: fd_io_uring (resource)
  //    to_submit: int32 = 0x100847c0 (4 bytes)
  //    min_complete: int32 = 0x0 (4 bytes)
  //    flags: io_uring_enter_flags = 0x1 (8 bytes)
  //    sigmask: nil
  //    size: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_io_uring_enter, /*fd=*/r[3], /*to_submit=*/0x100847c0,
          /*min_complete=*/0, /*flags=IORING_ENTER_GETEVENTS*/ 1ul,
          /*sigmask=*/0ul, /*size=*/0ul);
}
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;
}