// https://syzkaller.appspot.com/bug?id=1c88ec42afc09e2f866e195f4f9811fdfb9965d9
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <signal.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 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);
}

static void setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/sys/kernel/debug/failslab/task-filter", "Y"},
      {"/sys/kernel/debug/fail_page_alloc/task-filter", "Y"},
      {"/sys/kernel/debug/fail_futex/task-filter", "Y"},
      {"/sys/kernel/debug/fail_usercopy/task-filter", "Y"},
      {"/sys/kernel/debug/fail_make_request/task-filter", "Y"},
      {"/sys/kernel/debug/fail_io_timeout/task-filter", "Y"},
      {"/sys/kernel/debug/fail_iommufd/task-filter", "Y"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

uint64_t r[7] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void loop(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 00} (length 0x6)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000040, "./sys\000", 6);
  syscall(
      __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000040ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 00} (length 0x6)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {73 79 73 66 73 00} (length 0x6)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x200000000080, "./sys\000", 6);
  memcpy((void*)0x2000000000c0, "sysfs\000", 6);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000080ul,
          /*type=*/0x2000000000c0ul, /*flags=*/0ul, /*data=*/0ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 2f 63 6c 61 73 73 2f 66 63 6c 6f 6f 70 2f 63
  //      74 6c 2f 61 64 64 5f 6c 6f 63 61 6c 5f 70 6f 72 74 00} (length 0x26)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000100, "./sys/class/fcloop/ctl/add_local_port\000",
         38);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000100ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {77 77 6e 6e 3d 30 78 31 31 31 31 31 31 31 31 31 31 31 31 31
  //      31 31 31 2c 77 77 70 6e 3d 30 78 32 32 32 32 32 32 32 32 32 32 32 32
  //      32 32 32 32 00} (length 0x30)
  //    }
  //    count: len = 0x2f (8 bytes)
  //  ]
  memcpy((void*)0x200000000140,
         "wwnn=0x1111111111111111,wwpn=0x2222222222222222\000", 48);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000140ul, /*count=*/0x2ful);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 2f 63 6c 61 73 73 2f 66 63 6c 6f 6f 70 2f 63
  //      74 6c 2f 61 64 64 5f 74 61 72 67 65 74 5f 70 6f 72 74 00} (length
  //      0x27)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000180, "./sys/class/fcloop/ctl/add_target_port\000",
         39);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000180ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[1] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {77 77 6e 6e 3d 30 78 33 33 33 33 33 33 33 33 33 33 33 33 33
  //      33 33 33 2c 77 77 70 6e 3d 30 78 34 34 34 34 34 34 34 34 34 34 34 34
  //      34 34 34 34 00} (length 0x30)
  //    }
  //    count: len = 0x2f (8 bytes)
  //  ]
  memcpy((void*)0x2000000001c0,
         "wwnn=0x3333333333333333,wwpn=0x4444444444444444\000", 48);
  syscall(__NR_write, /*fd=*/r[1], /*buf=*/0x2000000001c0ul, /*count=*/0x2ful);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 2f 63 6c 61 73 73 2f 66 63 6c 6f 6f 70 2f 63
  //      74 6c 2f 61 64 64 5f 72 65 6d 6f 74 65 5f 70 6f 72 74 00} (length
  //      0x27)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000200, "./sys/class/fcloop/ctl/add_remote_port\000",
         39);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000200ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[2] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {77 77 6e 6e 3d 30 78 33 33 33 33 33 33 33 33 33 33 33 33 33
  //      33 33 33 2c 77 77 70 6e 3d 30 78 34 34 34 34 34 34 34 34 34 34 34 34
  //      34 34 34 34 2c 72 6f 6c 65 73 3d 33 32 2c 6c 70 77 77 6e 6e 3d 30 78
  //      31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 2c 6c 70 77 77 70 6e
  //      3d 30 78 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 00} (length
  //      0x6d)
  //    }
  //    count: len = 0x6c (8 bytes)
  //  ]
  memcpy((void*)0x200000000240,
         "wwnn=0x3333333333333333,wwpn=0x4444444444444444,roles=32,lpwwnn="
         "0x1111111111111111,lpwwpn=0x2222222222222222\000",
         109);
  syscall(__NR_write, /*fd=*/r[2], /*buf=*/0x200000000240ul, /*count=*/0x6cul);
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 00} (length 0x9)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000300, "./config\000", 9);
  syscall(
      __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000300ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 00} (length 0x9)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {63 6f 6e 66 69 67 66 73 00} (length 0x9)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x200000000340, "./config\000", 9);
  memcpy((void*)0x200000000380, "configfs\000", 9);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000340ul,
          /*type=*/0x200000000380ul, /*flags=*/0ul, /*data=*/0ul);
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 6e 76 6d 65 74 2f 73 75 62 73 79
  //      73 74 65 6d 73 2f 74 65 73 74 73 75 62 73 79 73 00} (length 0x25)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x2000000003c0, "./config/nvmet/subsystems/testsubsys\000", 37);
  syscall(
      __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x2000000003c0ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 6e 76 6d 65 74 2f 70 6f 72 74 73
  //      2f 31 00} (length 0x17)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000640, "./config/nvmet/ports/1\000", 23);
  syscall(
      __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000640ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 6e 76 6d 65 74 2f 70 6f 72 74 73
  //      2f 31 2f 61 64 64 72 5f 74 72 74 79 70 65 00} (length 0x23)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000680, "./config/nvmet/ports/1/addr_trtype\000", 35);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000680ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[3] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {66 63 0a} (length 0x3)
  //    }
  //    count: len = 0x3 (8 bytes)
  //  ]
  memcpy((void*)0x2000000006c0, "fc\n", 3);
  syscall(__NR_write, /*fd=*/r[3], /*buf=*/0x2000000006c0ul, /*count=*/3ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 6e 76 6d 65 74 2f 70 6f 72 74 73
  //      2f 31 2f 61 64 64 72 5f 61 64 72 66 61 6d 00} (length 0x23)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000700, "./config/nvmet/ports/1/addr_adrfam\000", 35);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000700ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[4] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {66 63 0a} (length 0x3)
  //    }
  //    count: len = 0x3 (8 bytes)
  //  ]
  memcpy((void*)0x200000000740, "fc\n", 3);
  syscall(__NR_write, /*fd=*/r[4], /*buf=*/0x200000000740ul, /*count=*/3ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 6e 76 6d 65 74 2f 70 6f 72 74 73
  //      2f 31 2f 61 64 64 72 5f 74 72 61 64 64 72 00} (length 0x23)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000780, "./config/nvmet/ports/1/addr_traddr\000", 35);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000780ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[5] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {6e 6e 2d 30 78 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33
  //      33 3a 70 6e 2d 30 78 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34
  //      0a} (length 0x2c)
  //    }
  //    count: len = 0x2c (8 bytes)
  //  ]
  memcpy((void*)0x2000000007c0, "nn-0x3333333333333333:pn-0x4444444444444444\n",
         44);
  syscall(__NR_write, /*fd=*/r[5], /*buf=*/0x2000000007c0ul, /*count=*/0x2cul);
  //  symlinkat arguments: [
  //    old: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 6e 76 6d 65 74 2f 73 75 62 73 79
  //      73 74 65 6d 73 2f 74 65 73 74 73 75 62 73 79 73 00} (length 0x25)
  //    }
  //    newfd: fd_dir (resource)
  //    new: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 6e 76 6d 65 74 2f 70 6f 72 74 73
  //      2f 31 2f 73 75 62 73 79 73 74 65 6d 73 2f 74 65 73 74 73 75 62 73 79
  //      73 00} (length 0x2d)
  //    }
  //  ]
  memcpy((void*)0x200000000800, "./config/nvmet/subsystems/testsubsys\000", 37);
  memcpy((void*)0x200000000840,
         "./config/nvmet/ports/1/subsystems/testsubsys\000", 45);
  syscall(__NR_symlinkat, /*old=*/0x200000000800ul, /*newfd=*/0xffffff9c,
          /*new=*/0x200000000840ul);
  //  openat$nvme_fabrics arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 76 6d 65 2d 66 61 62 72 69 63 73 00}
  //      (length 0x12)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000880, "/dev/nvme-fabrics\000", 18);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000880ul, /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[6] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {74 72 61 6e 73 70 6f 72 74 3d 66 63 2c 74 72 61 64 64 72 3d
  //      6e 6e 2d 30 78 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 3a 70
  //      6e 2d 30 78 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 2c 68 6f
  //      73 74 5f 74 72 61 64 64 72 3d 6e 6e 2d 30 78 31 31 31 31 31 31 31 31
  //      31 31 31 31 31 31 31 31 3a 70 6e 2d 30 78 32 32 32 32 32 32 32 32 32
  //      32 32 32 32 32 32 32 2c 6e 71 6e 3d 74 65 73 74 73 75 62 73 79 73 00}
  //      (length 0x87)
  //    }
  //    count: len = 0x86 (8 bytes)
  //  ]
  memcpy(
      (void*)0x2000000008c0,
      "transport=fc,traddr=nn-0x3333333333333333:pn-0x4444444444444444,host_"
      "traddr=nn-0x1111111111111111:pn-0x2222222222222222,nqn=testsubsys\000",
      135);
  syscall(__NR_write, /*fd=*/r[6], /*buf=*/0x2000000008c0ul, /*count=*/0x86ul);
}
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);
  setup_sysctl();
  const char* reason;
  (void)reason;
  do_sandbox_none();
  return 0;
}