// https://syzkaller.appspot.com/bug?id=58b5ea4e55add977fceeb33a731034744e5bec47
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.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>

#include <linux/futex.h>

#ifndef __NR_bind
#define __NR_bind 200
#endif
#ifndef __NR_bpf
#define __NR_bpf 280
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_sendmsg
#define __NR_sendmsg 211
#endif
#ifndef __NR_setns
#define __NR_setns 268
#endif
#ifndef __NR_write
#define __NR_write 64
#endif

static unsigned long long procid;

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 void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

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");
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 8; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (call == 6)
        break;
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(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;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  syz_init_net_socket$llc arguments: [
    //    domain: const = 0x1a (8 bytes)
    //    type: llc_socket_type = 0x2 (8 bytes)
    //    proto: const = 0x0 (8 bytes)
    //  ]
    //  returns sock_llc
    res = -1;
    res = syz_init_net_socket(/*domain=*/0x1a, /*type=SOCK_DGRAM*/ 2,
                              /*proto=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  bind$llc arguments: [
    //    fd: sock_llc (resource)
    //    addr: ptr[in, sockaddr_llc] {
    //      sockaddr_llc {
    //        sllc_family: const = 0x1a (2 bytes)
    //        sllc_arphrd: dev_type_arphdr = 0x0 (2 bytes)
    //        sllc_test: int8 = 0x0 (1 bytes)
    //        sllc_xid: int8 = 0x0 (1 bytes)
    //        sllc_ua: int8 = 0x0 (1 bytes)
    //        sllc_sap: int8 = 0x42 (1 bytes)
    //        sll_addr: union mac_addr {
    //          empty: buffer: {00 00 00 00 00 00} (length 0x6)
    //        }
    //        pad = 0x0 (2 bytes)
    //      }
    //    }
    //    addrlen: len = 0x10 (8 bytes)
    //  ]
    *(uint16_t*)0x20000000 = 0x1a;
    *(uint16_t*)0x20000002 = 0;
    *(uint8_t*)0x20000004 = 0;
    *(uint8_t*)0x20000005 = 0;
    *(uint8_t*)0x20000006 = 0;
    *(uint8_t*)0x20000007 = 0x42;
    memset((void*)0x20000008, 0, 6);
    syscall(__NR_bind, /*fd=*/r[0], /*addr=*/0x20000000ul, /*addrlen=*/0x10ul);
    break;
  case 2:
    //  bpf$PROG_LOAD_XDP arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: ptr[in, bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
    //    const[BPF_XDP, int32], const[0, int32], const[0, int32]]] {
    //      bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32], const[BPF_XDP, int32],
    //      const[0, int32], const[0, int32]] {
    //        type: const = 0x6 (4 bytes)
    //        ninsn: bytesize8 = 0x3 (4 bytes)
    //        insns: ptr[inout, array[ANYUNION]] {
    //          array[ANYUNION] {
    //            union ANYUNION {
    //              ANYBLOB: buffer: {18 00 00 00 02 00 00 00 00 00 00 00 00 00
    //              00 00 95} (length 0x11)
    //            }
    //          }
    //        }
    //        license: nil
    //        loglev: int32 = 0x0 (4 bytes)
    //        logsize: len = 0x0 (4 bytes)
    //        log: nil
    //        kern_version: bpf_kern_version = 0x0 (4 bytes)
    //        flags: bpf_prog_load_flags = 0x7f (4 bytes)
    //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00} (length 0x10) prog_ifindex: ifindex (resource)
    //        expected_attach_type: const = 0x25 (4 bytes)
    //        btf_fd: fd_btf (resource)
    //        func_info_rec_size: const = 0x8 (4 bytes)
    //        func_info: nil
    //        func_info_cnt: len = 0x0 (4 bytes)
    //        line_info_rec_size: const = 0x10 (4 bytes)
    //        line_info: nil
    //        line_info_cnt: len = 0x0 (4 bytes)
    //        attach_btf_id: const = 0x0 (4 bytes)
    //        attach_prog_fd: const = 0x0 (4 bytes)
    //        core_relo_cnt: len = 0xa (4 bytes)
    //        fd_array: nil
    //        core_relos: nil
    //        core_relo_rec_size: const = 0x10 (4 bytes)
    //        log_true_size: int32 = 0x1 (4 bytes)
    //        prog_token_fd: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
    //        const[BPF_XDP, int32], const[0, int32], const[0,
    //        int32]]_prog_token_fd_wrapper {
    //          void: buffer: {} (length 0x0)
    //        }
    //        pad: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
    //        const[BPF_XDP, int32], const[0, int32], const[0,
    //        int32]]_pad_wrapper {
    //          value: const = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    size: len = 0x94 (8 bytes)
    //  ]
    //  returns fd_bpf_prog_xdp
    *(uint32_t*)0x20000140 = 6;
    *(uint32_t*)0x20000144 = 3;
    *(uint64_t*)0x20000148 = 0x20000680;
    memcpy(
        (void*)0x20000680,
        "\x18\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x95",
        17);
    *(uint64_t*)0x20000150 = 0;
    *(uint32_t*)0x20000158 = 0;
    *(uint32_t*)0x2000015c = 0;
    *(uint64_t*)0x20000160 = 0;
    *(uint32_t*)0x20000168 = 0;
    *(uint32_t*)0x2000016c = 0x7f;
    memset((void*)0x20000170, 0, 16);
    *(uint32_t*)0x20000180 = 0;
    *(uint32_t*)0x20000184 = 0x25;
    *(uint32_t*)0x20000188 = -1;
    *(uint32_t*)0x2000018c = 8;
    *(uint64_t*)0x20000190 = 0;
    *(uint32_t*)0x20000198 = 0;
    *(uint32_t*)0x2000019c = 0x10;
    *(uint64_t*)0x200001a0 = 0;
    *(uint32_t*)0x200001a8 = 0;
    *(uint32_t*)0x200001ac = 0;
    *(uint32_t*)0x200001b0 = 0;
    *(uint32_t*)0x200001b4 = 0xa;
    *(uint64_t*)0x200001b8 = 0;
    *(uint64_t*)0x200001c0 = 0;
    *(uint32_t*)0x200001c8 = 0x10;
    *(uint32_t*)0x200001cc = 1;
    *(uint32_t*)0x200001d0 = 0;
    syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000140ul, /*size=*/0x94ul);
    break;
  case 3:
    //  setns arguments: [
    //    fd: fd_namespace (resource)
    //    type: ns_type = 0x0 (8 bytes)
    //  ]
    syscall(__NR_setns, /*fd=*/0xc9, /*type=*/0ul);
    break;
  case 4:
    //  write$cgroup_subtree arguments: [
    //    fd: fd_cgroup_subtree (resource)
    //    buf: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //        union ANYUNION {
    //          ANYBLOB: buffer: {8f ed cb 79 10 0a 6c 52 d9 22 ba 2a 05 dd 42}
    //          (length 0xf)
    //        }
    //      }
    //    }
    //    len: bytesize = 0xfdef (8 bytes)
    //  ]
    memcpy((void*)0x20000000,
           "\x8f\xed\xcb\x79\x10\x0a\x6c\x52\xd9\x22\xba\x2a\x05\xdd\x42", 15);
    syscall(__NR_write, /*fd=*/(intptr_t)-1, /*buf=*/0x20000000ul,
            /*len=*/0xfdeful);
    break;
  case 5:
    //  bpf$PROG_LOAD_XDP arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: ptr[in, bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
    //    const[BPF_XDP, int32], const[0, int32], const[0, int32]]] {
    //      bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32], const[BPF_XDP, int32],
    //      const[0, int32], const[0, int32]] {
    //        type: const = 0x6 (4 bytes)
    //        ninsn: bytesize8 = 0x3 (4 bytes)
    //        insns: ptr[inout, array[ANYUNION]] {
    //          array[ANYUNION] {
    //          }
    //        }
    //        license: ptr[in, buffer] {
    //          buffer: {73 79 7a 6b 61 6c 6c 65 72 00} (length 0xa)
    //        }
    //        loglev: int32 = 0x0 (4 bytes)
    //        logsize: len = 0x0 (4 bytes)
    //        log: nil
    //        kern_version: bpf_kern_version = 0x0 (4 bytes)
    //        flags: bpf_prog_load_flags = 0x45 (4 bytes)
    //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00} (length 0x10) prog_ifindex: ifindex (resource)
    //        expected_attach_type: const = 0x25 (4 bytes)
    //        btf_fd: fd_btf (resource)
    //        func_info_rec_size: const = 0x8 (4 bytes)
    //        func_info: nil
    //        func_info_cnt: len = 0x0 (4 bytes)
    //        line_info_rec_size: const = 0x10 (4 bytes)
    //        line_info: nil
    //        line_info_cnt: len = 0x0 (4 bytes)
    //        attach_btf_id: const = 0x0 (4 bytes)
    //        attach_prog_fd: const = 0x0 (4 bytes)
    //        core_relo_cnt: len = 0x0 (4 bytes)
    //        fd_array: nil
    //        core_relos: nil
    //        core_relo_rec_size: const = 0x10 (4 bytes)
    //        log_true_size: int32 = 0x0 (4 bytes)
    //        prog_token_fd: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
    //        const[BPF_XDP, int32], const[0, int32], const[0,
    //        int32]]_prog_token_fd_wrapper {
    //          void: buffer: {} (length 0x0)
    //        }
    //        pad: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
    //        const[BPF_XDP, int32], const[0, int32], const[0,
    //        int32]]_pad_wrapper {
    //          value: const = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    size: len = 0x94 (8 bytes)
    //  ]
    //  returns fd_bpf_prog_xdp
    *(uint32_t*)0x20000800 = 6;
    *(uint32_t*)0x20000804 = 3;
    *(uint64_t*)0x20000808 = 0x20000680;
    *(uint64_t*)0x20000810 = 0x200002c0;
    memcpy((void*)0x200002c0, "syzkaller\000", 10);
    *(uint32_t*)0x20000818 = 0;
    *(uint32_t*)0x2000081c = 0;
    *(uint64_t*)0x20000820 = 0;
    *(uint32_t*)0x20000828 = 0;
    *(uint32_t*)0x2000082c = 0x45;
    memset((void*)0x20000830, 0, 16);
    *(uint32_t*)0x20000840 = 0;
    *(uint32_t*)0x20000844 = 0x25;
    *(uint32_t*)0x20000848 = -1;
    *(uint32_t*)0x2000084c = 8;
    *(uint64_t*)0x20000850 = 0;
    *(uint32_t*)0x20000858 = 0;
    *(uint32_t*)0x2000085c = 0x10;
    *(uint64_t*)0x20000860 = 0;
    *(uint32_t*)0x20000868 = 0;
    *(uint32_t*)0x2000086c = 0;
    *(uint32_t*)0x20000870 = 0;
    *(uint32_t*)0x20000874 = 0;
    *(uint64_t*)0x20000878 = 0;
    *(uint64_t*)0x20000880 = 0;
    *(uint32_t*)0x20000888 = 0x10;
    *(uint32_t*)0x2000088c = 0;
    *(uint32_t*)0x20000890 = 0;
    res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000800ul, /*size=*/0x94ul);
    if (res != -1)
      r[1] = res;
    break;
  case 6:
    //  bpf$BPF_PROG_TEST_RUN arguments: [
    //    cmd: const = 0xa (8 bytes)
    //    arg: ptr[in, bpf_test_prog_arg] {
    //      bpf_test_prog_arg {
    //        prog: fd_bpf_prog (resource)
    //        retval: const = 0x5 (4 bytes)
    //        insizedata: len = 0xb68 (4 bytes)
    //        outsizedata: len = 0x88ca (4 bytes)
    //        indata: ptr[in, buffer] {
    //          buffer: {25} (length 0x1)
    //        }
    //        outdata: nil
    //        repeat: int32 = 0xd01 (4 bytes)
    //        dur: const = 0x80040000 (4 bytes)
    //        insizectx: len = 0x0 (4 bytes)
    //        outsizectx: len = 0x0 (4 bytes)
    //        inctx: nil
    //        outctx: nil
    //        flags: bpf_prog_test_run_flags = 0x2 (4 bytes)
    //        cpu: const = 0x0 (4 bytes)
    //        batch_size: int32 = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    size: len = 0x48 (8 bytes)
    //  ]
    *(uint32_t*)0x20000600 = r[1];
    *(uint32_t*)0x20000604 = 5;
    *(uint32_t*)0x20000608 = 0xb68;
    *(uint32_t*)0x2000060c = 0x88ca;
    *(uint64_t*)0x20000610 = 0x20000000;
    memset((void*)0x20000000, 37, 1);
    *(uint64_t*)0x20000618 = 0;
    *(uint32_t*)0x20000620 = 0xd01;
    *(uint32_t*)0x20000624 = 0x80040000;
    *(uint32_t*)0x20000628 = 0;
    *(uint32_t*)0x2000062c = 0;
    *(uint64_t*)0x20000630 = 0;
    *(uint64_t*)0x20000638 = 0;
    *(uint32_t*)0x20000640 = 2;
    *(uint32_t*)0x20000644 = 0;
    *(uint32_t*)0x20000648 = 0;
    syscall(__NR_bpf, /*cmd=*/0xaul, /*arg=*/0x20000600ul, /*size=*/0x48ul);
    break;
  case 7:
    //  sendmsg$nl_route arguments: [
    //    fd: sock_nl_route (resource)
    //    msg: ptr[in, msghdr_netlink[netlink_msg_route]] {
    //      msghdr_netlink[netlink_msg_route] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: nil
    //        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)
    //  ]
    *(uint64_t*)0x20000000 = 0;
    *(uint32_t*)0x20000008 = 0;
    *(uint64_t*)0x20000010 = 0;
    *(uint64_t*)0x20000018 = 1;
    *(uint64_t*)0x20000020 = 0;
    *(uint64_t*)0x20000028 = 0;
    *(uint32_t*)0x20000030 = 0;
    syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x20000000ul, /*f=*/0ul);
    break;
  }
}
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;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}