// https://syzkaller.appspot.com/bug?id=23b42017412e73fb730cffe0826ecc55030f8583
// 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/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.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 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;
}

const int kInitNetNsFd = 201;

static long syz_init_net_socket(volatile long domain, volatile long type,
                                volatile long proto)
{
  return syscall(__NR_socket, domain, type, proto);
}

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");
}

#define KMEMLEAK_FILE "/sys/kernel/debug/kmemleak"

static const char* setup_leak()
{
  if (!write_file(KMEMLEAK_FILE, "scan=off")) {
    if (errno == EBUSY)
      return "KMEMLEAK disabled: increase CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE"
             " or unset CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF";
    return "failed to write(kmemleak, \"scan=off\")";
  }
  if (!write_file(KMEMLEAK_FILE, "scan"))
    return "failed to write(kmemleak, \"scan\")";
  sleep(5);
  if (!write_file(KMEMLEAK_FILE, "scan"))
    return "failed to write(kmemleak, \"scan\")";
  if (!write_file(KMEMLEAK_FILE, "clear"))
    return "failed to write(kmemleak, \"clear\")";
  return NULL;
}

static void check_leaks(void)
{
  int fd = open(KMEMLEAK_FILE, O_RDWR);
  if (fd == -1)
    exit(1);
  uint64_t start = current_time_ms();
  if (write(fd, "scan", 4) != 4)
    exit(1);
  sleep(1);
  while (current_time_ms() - start < 4 * 1000)
    sleep(1);
  if (write(fd, "scan", 4) != 4)
    exit(1);
  static char buf[128 << 10];
  ssize_t n = read(fd, buf, sizeof(buf) - 1);
  if (n < 0)
    exit(1);
  int nleaks = 0;
  if (n != 0) {
    sleep(1);
    if (write(fd, "scan", 4) != 4)
      exit(1);
    if (lseek(fd, 0, SEEK_SET) < 0)
      exit(1);
    n = read(fd, buf, sizeof(buf) - 1);
    if (n < 0)
      exit(1);
    buf[n] = 0;
    char* pos = buf;
    char* end = buf + n;
    while (pos < end) {
      char* next = strstr(pos + 1, "unreferenced object");
      if (!next)
        next = end;
      char prev = *next;
      *next = 0;
      fprintf(stderr, "BUG: memory leak\n%s\n", pos);
      *next = prev;
      pos = next;
      nleaks++;
    }
  }
  if (write(fd, "clear", 5) != 5)
    exit(1);
  close(fd);
  if (nleaks)
    exit(1);
}

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;
    }
    check_leaks();
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$inet arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: socket_type = 0x4000000000000001 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock_in
  syscall(__NR_socket, /*domain=*/2ul,
          /*type=SOCK_STREAM|0x4000000000000000*/ 0x4000000000000001ul,
          /*proto=*/0);
  //  socket$inet_sctp arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: sctp_socket_type = 0x1 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp
  syscall(__NR_socket, /*domain=*/2ul, /*type=SOCK_STREAM*/ 1ul,
          /*proto=*/0x84);
  //  socket$inet6_sctp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: sctp_socket_type = 0x5 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp6
  syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_SEQPACKET*/ 5ul,
          /*proto=*/0x84);
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  //  openat$nci arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 76 69 72 74 75 61 6c 5f 6e 63 69 00} (length
  //      0x11)
  //    }
  //    flags: const = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_nci
  memcpy((void*)0x200000000080, "/dev/virtual_nci\000", 17);
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000080ul,
          /*flags=*/2, /*mode=*/0);
  //  syz_init_net_socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (8 bytes)
  //  ]
  //  returns sock_nl_generic_init
  res = -1;
  res = syz_init_net_socket(/*domain=*/0x10, /*type=*/3, /*proto=*/0x10);
  if (res != -1)
    r[0] = res;
  //  syz_init_net_socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (8 bytes)
  //  ]
  //  returns sock_nl_generic_init
  syz_init_net_socket(/*domain=*/0x10, /*type=*/3, /*proto=*/0x10);
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  //  socketpair$unix arguments: [
  //    domain: const = 0x1 (8 bytes)
  //    type: unix_socket_type = 0x2 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //    fds: ptr[out, unix_pair] {
  //      unix_pair {
  //        fd0: sock_unix (resource)
  //        fd1: sock_unix (resource)
  //      }
  //    }
  //  ]
  res = syscall(__NR_socketpair, /*domain=*/1ul, /*type=SOCK_DGRAM*/ 2ul,
                /*proto=*/0, /*fds=*/0x200000000040ul);
  if (res != -1) {
    r[1] = *(uint32_t*)0x200000000040;
    r[2] = *(uint32_t*)0x200000000044;
  }
  //  sendmsg$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: nil
  //        msg_iovlen: len = 0x0 (8 bytes)
  //        msg_control: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {28 01 00 00 00 00 00 00 01 00 00 00 01}
  //              (length 0xd)
  //            }
  //          }
  //        }
  //        msg_controllen: bytesize = 0x128 (8 bytes)
  //        msg_flags: const = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000001b00 = 0;
  *(uint32_t*)0x200000001b08 = 0;
  *(uint64_t*)0x200000001b10 = 0;
  *(uint64_t*)0x200000001b18 = 0;
  *(uint64_t*)0x200000001b20 = 0x200000001d80;
  memcpy((void*)0x200000001d80,
         "\x28\x01\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x01", 13);
  *(uint64_t*)0x200000001b28 = 0x128;
  *(uint32_t*)0x200000001b30 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x200000001b00ul, /*f=*/0ul);
  //  recvmsg$unix arguments: [
  //    fd: sock_unix (resource)
  //    msg: ptr[inout, recv_msghdr_un] {
  //      recv_msghdr_un {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: nil
  //        vlen: len = 0x0 (8 bytes)
  //        ctrl: ptr[out, array[cmsghdr_un]] {
  //          array[cmsghdr_un] {
  //            union cmsghdr_un {
  //              cred: cmsghdr_t[SOL_SOCKET, SCM_CREDENTIALS, cmsg_un_cred] {
  //                unaligned: cmsghdr_unaligned[SOL_SOCKET, SCM_CREDENTIALS,
  //                cmsg_un_cred] {
  //                  cmsg_len: len = 0x1c (8 bytes)
  //                  cmsg_level: const = 0x1 (4 bytes)
  //                  cmsg_type: const = 0x2 (4 bytes)
  //                  data: cmsg_un_cred {
  //                    pid: pid (resource)
  //                    uid: uid (resource)
  //                    gid: gid (resource)
  //                  }
  //                }
  //                pad = 0x0 (4 bytes)
  //              }
  //            }
  //            union cmsghdr_un {
  //              cred: cmsghdr_t[SOL_SOCKET, SCM_CREDENTIALS, cmsg_un_cred] {
  //                unaligned: cmsghdr_unaligned[SOL_SOCKET, SCM_CREDENTIALS,
  //                cmsg_un_cred] {
  //                  cmsg_len: len = 0x1c (8 bytes)
  //                  cmsg_level: const = 0x1 (4 bytes)
  //                  cmsg_type: const = 0x2 (4 bytes)
  //                  data: cmsg_un_cred {
  //                    pid: pid (resource)
  //                    uid: uid (resource)
  //                    gid: gid (resource)
  //                  }
  //                }
  //                pad = 0x0 (4 bytes)
  //              }
  //            }
  //            union cmsghdr_un {
  //              cred: cmsghdr_t[SOL_SOCKET, SCM_CREDENTIALS, cmsg_un_cred] {
  //                unaligned: cmsghdr_unaligned[SOL_SOCKET, SCM_CREDENTIALS,
  //                cmsg_un_cred] {
  //                  cmsg_len: len = 0x1c (8 bytes)
  //                  cmsg_level: const = 0x1 (4 bytes)
  //                  cmsg_type: const = 0x2 (4 bytes)
  //                  data: cmsg_un_cred {
  //                    pid: pid (resource)
  //                    uid: uid (resource)
  //                    gid: gid (resource)
  //                  }
  //                }
  //                pad = 0x0 (4 bytes)
  //              }
  //            }
  //            union cmsghdr_un {
  //              rights: cmsghdr_t[SOL_SOCKET, SCM_RIGHTS, array[fd]] {
  //                unaligned: cmsghdr_unaligned[SOL_SOCKET, SCM_RIGHTS,
  //                array[fd]] {
  //                  cmsg_len: len = 0x18 (8 bytes)
  //                  cmsg_level: const = 0x1 (4 bytes)
  //                  cmsg_type: const = 0x1 (4 bytes)
  //                  data: array[fd] {
  //                    fd (resource)
  //                    fd (resource)
  //                  }
  //                }
  //              }
  //            }
  //          }
  //        }
  //        ctrllen: bytesize = 0x78 (8 bytes)
  //        f: const = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: recv_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000000 = 0;
  *(uint32_t*)0x200000000008 = 0;
  *(uint64_t*)0x200000000010 = 0;
  *(uint64_t*)0x200000000018 = 0;
  *(uint64_t*)0x200000000020 = 0x200000000f40;
  *(uint64_t*)0x200000000028 = 0x78;
  *(uint32_t*)0x200000000030 = 0;
  res = syscall(__NR_recvmsg, /*fd=*/r[1], /*msg=*/0x200000000000ul, /*f=*/0ul,
                0);
  if (res != -1)
    r[3] = *(uint32_t*)0x200000000fb4;
  //  sendmsg$NFC_CMD_DEV_UP arguments: [
  //    fd: sock_nl_generic_init (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[genl_nfc_family_id,
  //    genlmsghdr_t[NFC_CMD_DEV_UP], nfc_genl_policy_dev_index]]] {
  //      msghdr_netlink[netlink_msg_t[genl_nfc_family_id,
  //      genlmsghdr_t[NFC_CMD_DEV_UP], nfc_genl_policy_dev_index]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_t[genl_nfc_family_id,
  //        genlmsghdr_t[NFC_CMD_DEV_UP], nfc_genl_policy_dev_index]]] {
  //          iovec[in, netlink_msg_t[genl_nfc_family_id,
  //          genlmsghdr_t[NFC_CMD_DEV_UP], nfc_genl_policy_dev_index]] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {1c 00 00 00} (length 0x4)
  //                }
  //                union ANYUNION {
  //                  ANYRES16: ANYRES16 (resource)
  //                }
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {01 00 28 bd 70 00 07 00 00 00 02 00 00
  //                  00 08 00 01} (length 0x11)
  //                }
  //              }
  //            }
  //            len: len = 0x1c (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x40089 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x8004 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000180 = 0;
  *(uint32_t*)0x200000000188 = 0;
  *(uint64_t*)0x200000000190 = 0x200000000280;
  *(uint64_t*)0x200000000280 = 0x200000000140;
  memcpy((void*)0x200000000140, "\x1c\x00\x00\x00", 4);
  *(uint16_t*)0x200000000144 = r[3];
  memcpy((void*)0x200000000146,
         "\x01\x00\x28\xbd\x70\x00\x07\x00\x00\x00\x02\x00\x00\x00\x08\x00\x01",
         17);
  *(uint64_t*)0x200000000288 = 0x1c;
  *(uint64_t*)0x200000000198 = 1;
  *(uint64_t*)0x2000000001a0 = 0;
  *(uint64_t*)0x2000000001a8 = 0;
  *(uint32_t*)0x2000000001b0 = 0x40089;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000180ul,
          /*f=MSG_MORE|MSG_DONTROUTE*/ 0x8004ul);
}
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;
  if ((reason = setup_leak()))
    printf("the reproducer may not work as expected: leak checking setup "
           "failed: %s\n",
           reason);
  loop();
  return 0;
}