// https://syzkaller.appspot.com/bug?id=1d8018c1ec95a792a1b5ac0a6811864fc8d23107
// 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>

#ifndef __NR_bpf
#define __NR_bpf 321
#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;
}

const int kInitNetNsFd = 201;

static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    unsigned long nb = a1;
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(nb % 10);
      nb /= 10;
    }
    return open(buf, a2 & ~O_CREAT, 0);
  }
}

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");
}

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

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  prctl$PR_SCHED_CORE arguments: [
  //    option: const = 0x3e (8 bytes)
  //    cmd: intptr = 0x1 (8 bytes)
  //    pid: pid (resource)
  //    type: pid_type = 0x1 (8 bytes)
  //    uaddr: nil
  //  ]
  syscall(__NR_prctl, /*option=*/0x3eul, /*cmd=*/1ul, /*pid=*/0,
          /*type=PIDTYPE_TGID*/ 1ul, /*uaddr=*/0ul);
  //  prlimit64 arguments: [
  //    pid: pid (resource)
  //    res: rlimit_type = 0xe (8 bytes)
  //    new: nil
  //    old: nil
  //  ]
  syscall(__NR_prlimit64, /*pid=*/0, /*res=RLIMIT_RTPRIO*/ 0xeul, /*new=*/0ul,
          /*old=*/0ul);
  //  sched_setscheduler arguments: [
  //    pid: pid (resource)
  //    policy: sched_policy = 0x1 (8 bytes)
  //    prio: nil
  //  ]
  syscall(__NR_sched_setscheduler, /*pid=*/0, /*policy=SCHED_FIFO*/ 1ul,
          /*prio=*/0ul);
  //  openat$sequencer arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: nil
  //    flags: open_flags = 0x80200 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_seq
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0ul,
          /*flags=O_TRUNC|O_CLOEXEC*/ 0x80200, /*mode=*/0);
  //  syz_open_dev$sndmidi arguments: [
  //    dev: nil
  //    id: intptr = 0x2 (8 bytes)
  //    flags: open_flags = 0x141102 (8 bytes)
  //  ]
  //  returns fd_midi
  res = -1;
  res = syz_open_dev(/*dev=*/0, /*id=*/2,
                     /*flags=O_SYNC|O_NOCTTY|O_NOATIME|O_RDWR*/ 0x141102);
  if (res != -1)
    r[0] = res;
  //  writev arguments: [
  //    fd: fd (resource)
  //    vec: nil
  //    vlen: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_writev, /*fd=*/r[0], /*vec=*/0ul, /*vlen=*/0ul);
  //  socket$inet6_sctp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: sctp_socket_type = 0x5 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_SEQPACKET*/ 5ul,
                /*proto=*/0x84);
  if (res != -1)
    r[1] = res;
  //  setsockopt$inet_sctp6_SCTP_SOCKOPT_BINDX_ADD arguments: [
  //    fd: sock_sctp6 (resource)
  //    level: const = 0x84 (4 bytes)
  //    opt: const = 0x64 (4 bytes)
  //    val: nil
  //    len: bytesize = 0x0 (8 bytes)
  //  ]
  syscall(__NR_setsockopt, /*fd=*/r[1], /*level=*/0x84, /*opt=*/0x64,
          /*val=*/0ul, /*len=*/0ul);
  //  syz_open_dev$usbmon arguments: [
  //    dev: nil
  //    id: intptr = 0x80000001 (8 bytes)
  //    flags: open_flags = 0x28100 (8 bytes)
  //  ]
  //  returns fd_usbmon
  syz_open_dev(/*dev=*/0, /*id=*/0x80000001,
               /*flags=O_NOFOLLOW|O_NOCTTY|O_LARGEFILE*/ 0x28100);
  //  sendmsg$NL80211_CMD_SET_TX_BITRATE_MASK arguments: [
  //    fd: sock_nl_generic (resource)
  //    msg: nil
  //    f: send_flags = 0xd0 (8 bytes)
  //  ]
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0ul,
          /*f=MSG_PROBE|MSG_EOR|MSG_DONTWAIT*/ 0xd0ul);
  //  bpf$BPF_BTF_LOAD arguments: [
  //    cmd: const = 0x12 (8 bytes)
  //    arg: nil
  //    size: len = 0x0 (8 bytes)
  //  ]
  //  returns fd_btf
  syscall(__NR_bpf, /*cmd=*/0x12ul, /*arg=*/0ul, /*size=*/0ul);
  //  socket arguments: [
  //    domain: socket_domain = 0x2 (8 bytes)
  //    type: socket_type = 0x80805 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  res = syscall(__NR_socket, /*domain=AF_INET*/ 2ul,
                /*type=SOCK_CLOEXEC|SOCK_NONBLOCK|SOCK_SEQPACKET*/ 0x80805ul,
                /*proto=*/0);
  if (res != -1)
    r[2] = res;
  //  setsockopt$inet_sctp_SCTP_EVENTS arguments: [
  //    fd: sock_sctp (resource)
  //    level: const = 0x84 (4 bytes)
  //    opt: const = 0xb (4 bytes)
  //    val: nil
  //    len: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_setsockopt, /*fd=*/r[2], /*level=*/0x84, /*opt=*/0xb,
          /*val=*/0ul, /*len=*/0ul);
  //  sendmmsg$inet_sctp arguments: [
  //    fd: sock_sctp (resource)
  //    mmsg: nil
  //    vlen: len = 0x0 (8 bytes)
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  syscall(__NR_sendmmsg, /*fd=*/r[2], /*mmsg=*/0ul, /*vlen=*/0ul, /*f=*/0ul);
  //  ioctl$SIOCGSTAMP arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8906 (4 bytes)
  //    arg: nil
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x8906, /*arg=*/0ul);
  //  recvmmsg$unix arguments: [
  //    fd: sock_unix (resource)
  //    mmsg: nil
  //    vlen: len = 0x0 (8 bytes)
  //    f: recv_flags = 0x20 (8 bytes)
  //    timeout: nil
  //  ]
  syscall(__NR_recvmmsg, /*fd=*/r[2], /*mmsg=*/0ul, /*vlen=*/0ul,
          /*f=MSG_TRUNC*/ 0x20ul, /*timeout=*/0ul);
  //  syz_init_net_socket$x25 arguments: [
  //    domain: const = 0x9 (8 bytes)
  //    type: const = 0x5 (8 bytes)
  //    proto: const = 0x0 (8 bytes)
  //  ]
  //  returns sock_x25
  res = -1;
  res = syz_init_net_socket(/*domain=*/9, /*type=*/5, /*proto=*/0);
  if (res != -1)
    r[3] = res;
  //  ioctl arguments: [
  //    fd: fd (resource)
  //    cmd: int32 = 0x890b (4 bytes)
  //    arg: ptr[in, buffer] {
  //      buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //      6c 61 70 62 30} (length 0x19)
  //    }
  //  ]
  memcpy((void*)0x2000000032c0,
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000lapb0",
         25);
  syscall(__NR_ioctl, /*fd=*/r[3], /*cmd=*/0x890b, /*arg=*/0x2000000032c0ul);
  //  bind$x25 arguments: [
  //    fd: sock_x25 (resource)
  //    addr: ptr[in, sockaddr_x25] {
  //      sockaddr_x25 {
  //        sx25_family: const = 0x9 (2 bytes)
  //        sx25_addr: union x25_address {
  //          null: buffer: {20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 00}
  //          (length 0x10)
  //        }
  //      }
  //    }
  //    addrlen: len = 0x12 (8 bytes)
  //  ]
  *(uint16_t*)0x200000003300 = 9;
  memcpy((void*)0x200000003302, "               \000", 16);
  syscall(__NR_bind, /*fd=*/r[3], /*addr=*/0x200000003300ul,
          /*addrlen=*/0x12ul);
  //  connect$x25 arguments: [
  //    fd: sock_x25 (resource)
  //    addr: ptr[in, sockaddr_x25] {
  //      sockaddr_x25 {
  //        sx25_family: const = 0x9 (2 bytes)
  //        sx25_addr: union x25_address {
  //          remote: x25_address_remote {
  //            prefix: buffer: {cc cc cc cc cc cc cc cc cc cc cc cc cc cc}
  //            (length 0xe) id: proc = 0x0 (1 bytes) z: const = 0x0 (1 bytes)
  //          }
  //        }
  //      }
  //    }
  //    addrlen: len = 0x12 (8 bytes)
  //  ]
  *(uint16_t*)0x200000003340 = 9;
  memset((void*)0x200000003342, 204, 14);
  *(uint8_t*)0x200000003350 = 0x20;
  *(uint8_t*)0x200000003351 = 0;
  syscall(__NR_connect, /*fd=*/r[3], /*addr=*/0x200000003340ul,
          /*addrlen=*/0x12ul);
  //  ioctl$sock_inet_SIOCSIFFLAGS arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8914 (4 bytes)
  //    arg: nil
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x8914, /*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;
}