// https://syzkaller.appspot.com/bug?id=121015dd8a362b292ca89d5f5ffbc9cfe184e684
// 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/mount.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;
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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 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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(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 64 65 76 00} (length 0x6)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000040, "./dev\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);
  //  rename arguments: [
  //    old: ptr[in, buffer] {
  //      buffer: {2e 2f 64 65 76 2f 6d 64 30 00} (length 0xa)
  //    }
  //    new: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 00} (length 0x6)
  //    }
  //  ]
  memcpy((void*)0x200000000100, "./dev/md0\000", 10);
  memcpy((void*)0x200000000140, "./sys\000", 6);
  syscall(__NR_rename, /*old=*/0x200000000100ul, /*new=*/0x200000000140ul);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 64 65 76 00} (length 0x6)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {64 65 76 74 6d 70 66 73 00} (length 0x9)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x200000000080, "./dev\000", 6);
  memcpy((void*)0x2000000000c0, "devtmpfs\000", 9);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000080ul,
          /*type=*/0x2000000000c0ul, /*flags=*/0ul, /*data=*/0ul);
  //  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*)0x200000000000, "./sys\000", 6);
  syscall(
      __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000000ul,
      /*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*)0x200000000040, "./sys\000", 6);
  memcpy((void*)0x200000000080, "sysfs\000", 6);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000040ul,
          /*type=*/0x200000000080ul, /*flags=*/0ul, /*data=*/0ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 73 79 73 2f 6d 6f 64 75 6c 65 2f 6d 64 5f 6d 6f 64 2f
  //      70 61 72 61 6d 65 74 65 72 73 2f 6e 65 77 5f 61 72 72 61 79 00}
  //      (length 0x29)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000180, "./sys/module/md_mod/parameters/new_array\000",
         41);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000180ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {6d 64 30} (length 0x3)
  //    }
  //    count: len = 0x3 (8 bytes)
  //  ]
  memcpy((void*)0x200000000200, "md0", 3);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000200ul, /*count=*/3ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 64 65 76 2f 6d 64 30 00} (length 0xa)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000240, "./dev/md0\000", 10);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000240ul,
                /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[1] = res;
  //  openat$vnet arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 76 68 6f 73 74 2d 6e 65 74 00} (length 0xf)
  //    }
  //    flags: const = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns vhost_net
  memcpy((void*)0x200000000480, "/dev/vhost-net\000", 15);
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000480ul,
          /*flags=*/2, /*mode=*/0);
  //  ioctl arguments: [
  //    fd: fd (resource)
  //    cmd: int32 = 0x40480923 (4 bytes)
  //    arg: ptr[in, buffer] {
  //      buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0a 00 00 00
  //      00 04 00 00 02 00 00 00 02 00 22 00 00 00 00 00 01 00 00 00 00 00 00
  //      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 01
  //      00 00 00 00 01} (length 0x47)
  //    }
  //  ]
  memcpy(
      (void*)0x200000000300,
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0a\x00"
      "\x00\x00\x00\x04\x00\x00\x02\x00\x00\x00\x02\x00\x22\x00\x00\x00\x00\x00"
      "\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x01\x00\x00\x00\x00\x01",
      71);
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x40480923,
          /*arg=*/0x200000000300ul);
  //  ioctl$SNDCTL_DSP_GETOSPACE arguments: [
  //    fd: fd_dsp (resource)
  //    cmd: const = 0x8010500c (4 bytes)
  //    arg: ptr[out, buffer] {
  //      buffer: (DirOut)
  //    }
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8010500c,
          /*arg=*/0x2000000001c0ul);
  //  ioctl arguments: [
  //    fd: fd (resource)
  //    cmd: int32 = 0x40140921 (4 bytes)
  //    arg: ptr[in, buffer] {
  //      buffer: {00 00 00 00 01} (length 0x5)
  //    }
  //  ]
  memcpy((void*)0x200000000400, "\x00\x00\x00\x00\x01", 5);
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x40140921,
          /*arg=*/0x200000000400ul);
  //  accept$alg arguments: [
  //    fd: sock_alg (resource)
  //    peer: const = 0x0 (8 bytes)
  //    peerlen: const = 0x0 (8 bytes)
  //  ]
  //  returns sock_algconn
  syscall(__NR_accept, /*fd=*/(intptr_t)-1, /*peer=*/0ul, /*peerlen=*/0ul);
  //  sendmsg$IPSET_CMD_CREATE arguments: [
  //    fd: sock_nl_netfilter (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_netfilter_t[NFNL_SUBSYS_IPSET,
  //    IPSET_CMD_CREATE, ip_set_create_policy]]] {
  //      msghdr_netlink[netlink_msg_netfilter_t[NFNL_SUBSYS_IPSET,
  //      IPSET_CMD_CREATE, ip_set_create_policy]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_netfilter_t[NFNL_SUBSYS_IPSET,
  //        IPSET_CMD_CREATE, ip_set_create_policy]]] {
  //          iovec[in, netlink_msg_netfilter_t[NFNL_SUBSYS_IPSET,
  //          IPSET_CMD_CREATE, ip_set_create_policy]] {
  //            addr: ptr[in, netlink_msg_netfilter_tt[NFNL_SUBSYS_IPSET,
  //            IPSET_CMD_CREATE, array[ip_set_create_policy]]] {
  //              netlink_msg_netfilter_tt[NFNL_SUBSYS_IPSET, IPSET_CMD_CREATE,
  //              array[ip_set_create_policy]] {
  //                len: len = 0x5c (4 bytes)
  //                type: const = 0x2 (1 bytes)
  //                subsys: const = 0x6 (1 bytes)
  //                flags: netlink_netfilter_msg_flags = 0x3 (2 bytes)
  //                seq: const = 0x0 (4 bytes)
  //                pid: const = 0x0 (4 bytes)
  //                hdr: nfgenmsg {
  //                  nfgen_family: nfproto = 0x0 (1 bytes)
  //                  version: const = 0x0 (1 bytes)
  //                  res_id: int16be = 0x0 (2 bytes)
  //                }
  //                attrs: array[ip_set_create_policy] {
  //                  union ip_set_create_policy {
  //                    IPSET_ATTR_PROTOCOL: nlattr_t[const[IPSET_ATTR_PROTOCOL,
  //                    int16], const[IPSET_PROTOCOL, int8]] {
  //                      nla_len: offsetof = 0x5 (2 bytes)
  //                      nla_type: const = 0x1 (2 bytes)
  //                      payload: const = 0x7 (1 bytes)
  //                      size: buffer: {} (length 0x0)
  //                      pad = 0x0 (3 bytes)
  //                    }
  //                  }
  //                  union ip_set_create_policy {
  //                    IPSET_ATTR_SETNAME: nlattr_t[const[IPSET_ATTR_SETNAME,
  //                    int16], string[ipset_name]] {
  //                      nla_len: offsetof = 0x9 (2 bytes)
  //                      nla_type: const = 0x2 (2 bytes)
  //                      payload: buffer: {73 79 7a 30 00} (length 0x5)
  //                      size: buffer: {} (length 0x0)
  //                      pad = 0x0 (3 bytes)
  //                    }
  //                  }
  //                  union ip_set_create_policy {
  //                    IPSET_ATTR_DATA: nlattr_tt[const[IPSET_ATTR_DATA,
  //                    int16:14], 0, 1, array[ip_set_type_create_policy]] {
  //                      nla_len: offsetof = 0xc (2 bytes)
  //                      nla_type: const = 0x7 (1 bytes)
  //                      NLA_F_NET_BYTEORDER: const = 0x0 (0 bytes)
  //                      NLA_F_NESTED: const = 0x1 (1 bytes)
  //                      payload: array[ip_set_type_create_policy] {
  //                        union ip_set_type_create_policy {
  //                          IPSET_ATTR_BUCKETSIZE:
  //                          nlattr_t[const[IPSET_ATTR_BUCKETSIZE, int16],
  //                          int8] {
  //                            nla_len: offsetof = 0x5 (2 bytes)
  //                            nla_type: const = 0x15 (2 bytes)
  //                            payload: int8 = 0x6 (1 bytes)
  //                            size: buffer: {} (length 0x0)
  //                            pad = 0x0 (3 bytes)
  //                          }
  //                        }
  //                      }
  //                      size: buffer: {} (length 0x0)
  //                    }
  //                  }
  //                  union ip_set_create_policy {
  //                    IPSET_ATTR_TYPENAME: nlattr_t[const[IPSET_ATTR_TYPENAME,
  //                    int16], string[ipset_type]] {
  //                      nla_len: offsetof = 0x16 (2 bytes)
  //                      nla_type: const = 0x3 (2 bytes)
  //                      payload: buffer: {68 61 73 68 3a 6e 65 74 2c 70 6f 72
  //                      74 2c 6e 65 74 00} (length 0x12) size: buffer: {}
  //                      (length 0x0)
  //                    }
  //                  }
  //                  union ip_set_create_policy {
  //                    IPSET_ATTR_FAMILY: nlattr_t[const[IPSET_ATTR_FAMILY,
  //                    int16], flags[nfproto, int8]] {
  //                      nla_len: offsetof = 0x5 (2 bytes)
  //                      nla_type: const = 0x5 (2 bytes)
  //                      payload: nfproto = 0xa (1 bytes)
  //                      size: buffer: {} (length 0x0)
  //                      pad = 0x0 (3 bytes)
  //                    }
  //                  }
  //                  union ip_set_create_policy {
  //                    IPSET_ATTR_REVISION: nlattr_t[const[IPSET_ATTR_REVISION,
  //                    int16], int8[0:3]] {
  //                      nla_len: offsetof = 0x5 (2 bytes)
  //                      nla_type: const = 0x4 (2 bytes)
  //                      payload: int8 = 0x0 (1 bytes)
  //                      size: buffer: {} (length 0x0)
  //                      pad = 0x0 (3 bytes)
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x5c (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x8004 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000100 = 0;
  *(uint32_t*)0x200000000108 = 0;
  *(uint64_t*)0x200000000110 = 0x2000000000c0;
  *(uint64_t*)0x2000000000c0 = 0x200000000280;
  *(uint32_t*)0x200000000280 = 0x5c;
  *(uint8_t*)0x200000000284 = 2;
  *(uint8_t*)0x200000000285 = 6;
  *(uint16_t*)0x200000000286 = 3;
  *(uint32_t*)0x200000000288 = 0;
  *(uint32_t*)0x20000000028c = 0;
  *(uint8_t*)0x200000000290 = 0;
  *(uint8_t*)0x200000000291 = 0;
  *(uint16_t*)0x200000000292 = htobe16(0);
  *(uint16_t*)0x200000000294 = 5;
  *(uint16_t*)0x200000000296 = 1;
  *(uint8_t*)0x200000000298 = 7;
  *(uint16_t*)0x20000000029c = 9;
  *(uint16_t*)0x20000000029e = 2;
  memcpy((void*)0x2000000002a0, "syz0\000", 5);
  *(uint16_t*)0x2000000002a8 = 0xc;
  STORE_BY_BITMASK(uint16_t, , 0x2000000002aa, 7, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000000002ab, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000000002ab, 1, 7, 1);
  *(uint16_t*)0x2000000002ac = 5;
  *(uint16_t*)0x2000000002ae = 0x15;
  *(uint8_t*)0x2000000002b0 = 6;
  *(uint16_t*)0x2000000002b4 = 0x16;
  *(uint16_t*)0x2000000002b6 = 3;
  memcpy((void*)0x2000000002b8, "hash:net,port,net\000", 18);
  *(uint16_t*)0x2000000002cc = 5;
  *(uint16_t*)0x2000000002ce = 5;
  *(uint8_t*)0x2000000002d0 = 0xa;
  *(uint16_t*)0x2000000002d4 = 5;
  *(uint16_t*)0x2000000002d6 = 4;
  *(uint8_t*)0x2000000002d8 = 0;
  *(uint64_t*)0x2000000000c8 = 0x5c;
  *(uint64_t*)0x200000000118 = 1;
  *(uint64_t*)0x200000000120 = 0;
  *(uint64_t*)0x200000000128 = 0;
  *(uint32_t*)0x200000000130 = 0x8004;
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x200000000100ul,
          /*f=*/0ul);
  //  socket$kcm arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: kcm_socket_type = 0xa (8 bytes)
  //    proto: const = 0x2 (4 bytes)
  //  ]
  //  returns sock_kcm
  syscall(__NR_socket, /*domain=*/2ul, /*type=SOCK_DGRAM|0x8*/ 0xaul,
          /*proto=*/2);
  //  ioctl arguments: [
  //    fd: fd (resource)
  //    cmd: int32 = 0x400c0930 (4 bytes)
  //    arg: nil
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x400c0930, /*arg=*/0ul);
}
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);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}