// https://syzkaller.appspot.com/bug?id=6a55ad261f82f9139ed81cafdc01ff40e0d4494f
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <setjmp.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#ifndef __NR_getsockopt
#define __NR_getsockopt 209
#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
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_mprotect
#define __NR_mprotect 226
#endif
#ifndef __NR_openat
#define __NR_openat 56
#endif
#ifndef __NR_sendmsg
#define __NR_sendmsg 211
#endif
#ifndef __NR_socket
#define __NR_socket 198
#endif

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

#define SIZEOF_IO_URING_SQE 64
#define SIZEOF_IO_URING_CQE 16

#define IORING_SETUP_SQE128 (1U << 10)
#define IORING_SETUP_CQE32 (1U << 11)

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 user_addr;
};

struct io_cqring_offsets {
  uint32_t head;
  uint32_t tail;
  uint32_t ring_mask;
  uint32_t ring_entries;
  uint32_t overflow;
  uint32_t cqes;
  uint32_t flags;
  uint32_t resv1;
  uint64_t user_addr;
};

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;
};

static long io_uring_sqe_size(struct io_uring_params* params)
{
  return SIZEOF_IO_URING_SQE << !!(params->flags & IORING_SETUP_SQE128);
}

static long io_uring_cqe_size(struct io_uring_params* params)
{
  return SIZEOF_IO_URING_CQE << !!(params->flags & IORING_SETUP_CQE32);
}

#define IORING_OFF_SQ_RING 0ULL
#define IORING_OFF_SQES 0x10000000ULL
static long syz_io_uring_setup(volatile long a0, volatile long a1,
                               volatile long a2, volatile long a3,
                               volatile long a4)
{
  uint32_t entries = (uint32_t)a0;
  struct io_uring_params* setup_params = (struct io_uring_params*)a1;
  void** ring_params_ptr_out = (void**)a2;
  void** ring_ptr_out = (void**)a3;
  void** sqes_ptr_out = (void**)a4;
  uint32_t fd_io_uring = syscall(__NR_io_uring_setup, entries, setup_params);
  *ring_params_ptr_out = (void*)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 * io_uring_cqe_size(setup_params);
  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 * io_uring_sqe_size(setup_params);
  *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 < setup_params->sq_entries; index++)
    array[index] = index;
  return fd_io_uring;
}

static long syz_io_uring_submit(volatile long a0, volatile long a1,
                                volatile long a2, volatile long a3)
{
  struct io_uring_params* params = (struct io_uring_params*)a0;
  char* ring_ptr = (char*)a1;
  char* sqes_ptr = (char*)a2;
  char* sqe = (char*)a3;
  uint32_t sq_ring_mask = *(uint32_t*)(ring_ptr + params->sq_off.ring_mask);
  uint32_t* sq_tail_ptr = (uint32_t*)(ring_ptr + params->sq_off.tail);
  uint32_t sq_tail = *sq_tail_ptr & sq_ring_mask;
  uint32_t sqe_size = io_uring_sqe_size(params);
  char* sqe_dest = sqes_ptr + sq_tail * sqe_size;
  memcpy(sqe_dest, sqe, sqe_size);
  uint32_t sq_tail_next = *sq_tail_ptr + 1;
  __atomic_store_n(sq_tail_ptr, sq_tail_next, __ATOMIC_RELEASE);
  return 0;
}

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

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  install_segv_handler();
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$smackfs_relabel_self arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 73 79 73 2f 66 73 2f 73 6d 61 63 6b 66 73 2f 72 65 6c 61
  //      62 65 6c 2d 73 65 6c 66 00} (length 0x1d)
  //    }
  //    flags: const = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_smackfs_labels_list
  NONFAILING(memcpy((void*)0x20000000, "/sys/fs/smackfs/relabel-self\000", 29));
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000000ul,
          /*flags=*/2, /*mode=*/0);
  //  syz_io_uring_setup arguments: [
  //    entries: int32 = 0x34b8 (4 bytes)
  //    params: ptr[inout, io_uring_params] {
  //      io_uring_params {
  //        sq_entries: int32 = 0x0 (4 bytes)
  //        cq_entries: int32 = 0xc3b1 (4 bytes)
  //        flags: io_uring_setup_flags = 0x800 (4 bytes)
  //        sq_thread_cpu: int32 = 0x1 (4 bytes)
  //        sq_thread_idle: int32 = 0x82 (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: io_sqring_offsets {
  //          head: int32 = 0x0 (4 bytes)
  //          tail: int32 = 0x0 (4 bytes)
  //          ring_mask: int32 = 0x0 (4 bytes)
  //          ring_entries: int32 = 0x0 (4 bytes)
  //          flags: int32 = 0x0 (4 bytes)
  //          dropped: int32 = 0x0 (4 bytes)
  //          array: int32 = 0x0 (4 bytes)
  //          resv1: int32 = 0x0 (4 bytes)
  //          user_addr: int64 = 0x0 (8 bytes)
  //        }
  //        cq_off: io_cqring_offsets {
  //          head: int32 = 0x0 (4 bytes)
  //          tail: int32 = 0x0 (4 bytes)
  //          ring_mask: int32 = 0x0 (4 bytes)
  //          ring_entries: int32 = 0x0 (4 bytes)
  //          overflow: int32 = 0x0 (4 bytes)
  //          cqes: int32 = 0x0 (4 bytes)
  //          flags: int32 = 0x0 (4 bytes)
  //          resv1: int32 = 0x0 (4 bytes)
  //          user_addr: int64 = 0x0 (8 bytes)
  //        }
  //      }
  //    }
  //    ring_params_ptr: ptr[out, ring_params_ptr] {
  //      ring_params_ptr (resource)
  //    }
  //    ring_ptr: ptr[out, ring_ptr] {
  //      ring_ptr (resource)
  //    }
  //    sqes_ptr: ptr[out, sqes_ptr] {
  //      sqes_ptr (resource)
  //    }
  //  ]
  //  returns fd_io_uring
  NONFAILING(*(uint32_t*)0x20000544 = 0xc3b1);
  NONFAILING(*(uint32_t*)0x20000548 = 0x800);
  NONFAILING(*(uint32_t*)0x2000054c = 1);
  NONFAILING(*(uint32_t*)0x20000550 = 0x82);
  NONFAILING(*(uint32_t*)0x20000558 = 0);
  NONFAILING(memset((void*)0x2000055c, 0, 12));
  res = -1;
  NONFAILING(res = syz_io_uring_setup(/*entries=*/0x34b8, /*params=*/0x20000540,
                                      /*ring_params_ptr=*/0x20000180,
                                      /*ring_ptr=*/0x20000140,
                                      /*sqes_ptr=*/0x20000100));
  if (res != -1) {
    r[0] = res;
    NONFAILING(r[1] = *(uint64_t*)0x20000180);
    NONFAILING(r[2] = *(uint64_t*)0x20000140);
    NONFAILING(r[3] = *(uint64_t*)0x20000100);
  }
  //  sendmsg$DEVLINK_CMD_RATE_SET arguments: [
  //    fd: sock_nl_generic (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[genl_devlink_family_id,
  //    genlmsghdr_t[DEVLINK_CMD_RATE_SET], devlink_nl_rate_set_policy]]] {
  //      msghdr_netlink[netlink_msg_t[genl_devlink_family_id,
  //      genlmsghdr_t[DEVLINK_CMD_RATE_SET], devlink_nl_rate_set_policy]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_t[genl_devlink_family_id,
  //        genlmsghdr_t[DEVLINK_CMD_RATE_SET], devlink_nl_rate_set_policy]]] {
  //          iovec[in, netlink_msg_t[genl_devlink_family_id,
  //          genlmsghdr_t[DEVLINK_CMD_RATE_SET], devlink_nl_rate_set_policy]] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //              }
  //            }
  //            len: len = 0x14 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  NONFAILING(*(uint64_t*)0x20000040 = 0);
  NONFAILING(*(uint32_t*)0x20000048 = 0);
  NONFAILING(*(uint64_t*)0x20000050 = 0x20000580);
  NONFAILING(*(uint64_t*)0x20000580 = 0x20000340);
  NONFAILING(*(uint64_t*)0x20000588 = 0x14);
  NONFAILING(*(uint64_t*)0x20000058 = 1);
  NONFAILING(*(uint64_t*)0x20000060 = 0);
  NONFAILING(*(uint64_t*)0x20000068 = 0);
  NONFAILING(*(uint32_t*)0x20000070 = 0);
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x20000040ul, /*f=*/0ul);
  //  socket$inet6_sctp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: sctp_socket_type = 0x1 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_STREAM*/ 1ul,
                /*proto=*/0x84);
  if (res != -1)
    r[4] = res;
  //  getsockopt$inet_sctp6_SCTP_SOCKOPT_CONNECTX3 arguments: [
  //    fd: sock_sctp6 (resource)
  //    level: const = 0x84 (4 bytes)
  //    opt: const = 0x6f (4 bytes)
  //    val: ptr[inout, sctp_getaddrs_old] {
  //      sctp_getaddrs_old {
  //        assoc_id: assoc_id (resource)
  //        addr_num: bytesize = 0x10 (4 bytes)
  //        addrs: ptr[in, array[sockaddr_sctp]] {
  //          array[sockaddr_sctp] {
  //            union sockaddr_sctp {
  //              in: sockaddr_in {
  //                family: const = 0x2 (2 bytes)
  //                port: int16be = 0x4e21 (2 bytes)
  //                addr: union ipv4_addr {
  //                  private: int32be = 0xa010100 (4 bytes)
  //                }
  //                pad = 0x0 (8 bytes)
  //              }
  //            }
  //          }
  //        }
  //      }
  //    }
  //    len: nil
  //  ]
  NONFAILING(*(uint32_t*)0x20000280 = 0);
  NONFAILING(*(uint32_t*)0x20000284 = 0x10);
  NONFAILING(*(uint64_t*)0x20000288 = 0x20000000);
  NONFAILING(*(uint16_t*)0x20000000 = 2);
  NONFAILING(*(uint16_t*)0x20000002 = htobe16(0x4e21));
  NONFAILING(*(uint32_t*)0x20000004 = htobe32(0xa010100));
  syscall(__NR_getsockopt, /*fd=*/r[4], /*level=*/0x84, /*opt=*/0x6f,
          /*val=*/0x20000280ul, /*len=*/0ul);
  //  getsockopt$inet_sctp6_SCTP_MAX_BURST arguments: [
  //    fd: sock_sctp6 (resource)
  //    level: const = 0x84 (4 bytes)
  //    opt: const = 0x83 (4 bytes)
  //    val: ptr[out, sctp_max_burst] {
  //      union sctp_max_burst {
  //        assoc_value: sctp_assoc_value {
  //          assoc_id: assoc_id (resource)
  //          assoc_value: int32 = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    len: ptr[inout, len] {
  //      len = 0x8 (4 bytes)
  //    }
  //  ]
  NONFAILING(*(uint32_t*)0x20000080 = 8);
  res = syscall(__NR_getsockopt, /*fd=*/r[4], /*level=*/0x84, /*opt=*/0x83,
                /*val=*/0x20000000ul, /*len=*/0x20000080ul);
  if (res != -1)
    NONFAILING(r[5] = *(uint32_t*)0x20000000);
  //  getsockopt$inet_sctp_SCTP_AUTH_ACTIVE_KEY arguments: [
  //    fd: sock_sctp (resource)
  //    level: const = 0x84 (4 bytes)
  //    opt: const = 0x18 (4 bytes)
  //    val: ptr[inout, sctp_authkeyid] {
  //      sctp_authkeyid {
  //        scact_assoc_id: assoc_id (resource)
  //        scact_keynumber: int16 = 0x3 (2 bytes)
  //        pad = 0x0 (2 bytes)
  //      }
  //    }
  //    len: nil
  //  ]
  NONFAILING(*(uint32_t*)0x20000040 = r[5]);
  NONFAILING(*(uint16_t*)0x20000044 = 3);
  syscall(__NR_getsockopt, /*fd=*/(intptr_t)-1, /*level=*/0x84, /*opt=*/0x18,
          /*val=*/0x20000040ul, /*len=*/0ul);
  //  mprotect arguments: [
  //    addr: VMA[0xf000]
  //    len: len = 0xf000 (8 bytes)
  //    prot: mmap_prot = 0x9 (8 bytes)
  //  ]
  syscall(__NR_mprotect, /*addr=*/0x20000000ul, /*len=*/0xf000ul,
          /*prot=PROT_SEM|PROT_READ*/ 9ul);
  //  syz_io_uring_submit arguments: [
  //    ring_params_ptr: ring_params_ptr (resource)
  //    ring_ptr: ring_ptr (resource)
  //    sqes_ptr: sqes_ptr (resource)
  //    sqe: ptr[in, io_uring_sqe_u] {
  //      union io_uring_sqe_u {
  //        IORING_OP_CLOSE: io_uring_sqe[IORING_OP_CLOSE, const[0, int16], fd,
  //        const[0, int64], const[0, int64], const[0, int32], const[0, int32],
  //        sqe_user_data_not_openat, io_uring_sqe_close_misc] {
  //          opcode: const = 0x13 (1 bytes)
  //          flags: iosqe_flags = 0x48 (1 bytes)
  //          ioprio: const = 0x0 (2 bytes)
  //          fd: fd (resource)
  //          off: const = 0x0 (8 bytes)
  //          addr: const = 0x0 (8 bytes)
  //          len: const = 0x0 (4 bytes)
  //          misc_flags: const = 0x0 (4 bytes)
  //          user_data: sqe_user_data_not_openat = 0x0 (8 bytes)
  //          misc: io_uring_sqe_close_misc {
  //            buf_index_unused: const = 0x0 (2 bytes)
  //            ioring_personality_id_unused: const = 0x0 (2 bytes)
  //            file_index: int32 = 0x0 (4 bytes)
  //            addr3_unused: const = 0x0 (8 bytes)
  //          }
  //          pad = 0x0 (8 bytes)
  //        }
  //      }
  //    }
  //  ]
  NONFAILING(*(uint8_t*)0x20000040 = 0x13);
  NONFAILING(*(uint8_t*)0x20000041 = 0x48);
  NONFAILING(*(uint16_t*)0x20000042 = 0);
  NONFAILING(*(uint32_t*)0x20000044 = r[0]);
  NONFAILING(*(uint64_t*)0x20000048 = 0);
  NONFAILING(*(uint64_t*)0x20000050 = 0);
  NONFAILING(*(uint32_t*)0x20000058 = 0);
  NONFAILING(*(uint32_t*)0x2000005c = 0);
  NONFAILING(*(uint64_t*)0x20000060 = 0);
  NONFAILING(*(uint16_t*)0x20000068 = 0);
  NONFAILING(*(uint16_t*)0x2000006a = 0);
  NONFAILING(*(uint32_t*)0x2000006c = 0);
  NONFAILING(*(uint64_t*)0x20000070 = 0);
  NONFAILING(syz_io_uring_submit(/*ring_params_ptr=*/r[1], /*ring_ptr=*/r[2],
                                 /*sqes_ptr=*/r[3], /*sqe=*/0x20000040));
  //  io_uring_enter arguments: [
  //    fd: fd_io_uring (resource)
  //    to_submit: int32 = 0x1 (4 bytes)
  //    min_complete: int32 = 0x1 (4 bytes)
  //    flags: io_uring_enter_flags = 0x1 (8 bytes)
  //    sigmask: nil
  //    size: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_io_uring_enter, /*fd=*/r[0], /*to_submit=*/1, /*min_complete=*/1,
          /*flags=IORING_ENTER_GETEVENTS*/ 1ul, /*sigmask=*/0ul, /*size=*/0ul);
  //  syz_io_uring_submit arguments: [
  //    ring_params_ptr: ring_params_ptr (resource)
  //    ring_ptr: ring_ptr (resource)
  //    sqes_ptr: sqes_ptr (resource)
  //    sqe: ptr[in, io_uring_sqe_u] {
  //      union io_uring_sqe_u {
  //        IORING_OP_CLOSE: io_uring_sqe[IORING_OP_CLOSE, const[0, int16], fd,
  //        const[0, int64], const[0, int64], const[0, int32], const[0, int32],
  //        sqe_user_data_not_openat, io_uring_sqe_close_misc] {
  //          opcode: const = 0x13 (1 bytes)
  //          flags: iosqe_flags = 0x48 (1 bytes)
  //          ioprio: const = 0x0 (2 bytes)
  //          fd: fd (resource)
  //          off: const = 0x0 (8 bytes)
  //          addr: const = 0x0 (8 bytes)
  //          len: const = 0x0 (4 bytes)
  //          misc_flags: const = 0x0 (4 bytes)
  //          user_data: sqe_user_data_not_openat = 0x0 (8 bytes)
  //          misc: io_uring_sqe_close_misc {
  //            buf_index_unused: const = 0x0 (2 bytes)
  //            ioring_personality_id_unused: const = 0x0 (2 bytes)
  //            file_index: int32 = 0x0 (4 bytes)
  //            addr3_unused: const = 0x0 (8 bytes)
  //          }
  //          pad = 0x0 (8 bytes)
  //        }
  //      }
  //    }
  //  ]
  NONFAILING(*(uint8_t*)0x20000040 = 0x13);
  NONFAILING(*(uint8_t*)0x20000041 = 0x48);
  NONFAILING(*(uint16_t*)0x20000042 = 0);
  NONFAILING(*(uint32_t*)0x20000044 = r[0]);
  NONFAILING(*(uint64_t*)0x20000048 = 0);
  NONFAILING(*(uint64_t*)0x20000050 = 0);
  NONFAILING(*(uint32_t*)0x20000058 = 0);
  NONFAILING(*(uint32_t*)0x2000005c = 0);
  NONFAILING(*(uint64_t*)0x20000060 = 0);
  NONFAILING(*(uint16_t*)0x20000068 = 0);
  NONFAILING(*(uint16_t*)0x2000006a = 0);
  NONFAILING(*(uint32_t*)0x2000006c = 0);
  NONFAILING(*(uint64_t*)0x20000070 = 0);
  NONFAILING(syz_io_uring_submit(/*ring_params_ptr=*/r[1], /*ring_ptr=*/r[2],
                                 /*sqes_ptr=*/r[3], /*sqe=*/0x20000040));
  //  io_uring_enter arguments: [
  //    fd: fd_io_uring (resource)
  //    to_submit: int32 = 0x1 (4 bytes)
  //    min_complete: int32 = 0x1 (4 bytes)
  //    flags: io_uring_enter_flags = 0x1 (8 bytes)
  //    sigmask: nil
  //    size: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_io_uring_enter, /*fd=*/r[0], /*to_submit=*/1, /*min_complete=*/1,
          /*flags=IORING_ENTER_GETEVENTS*/ 1ul, /*sigmask=*/0ul, /*size=*/0ul);
  return 0;
}