// https://syzkaller.appspot.com/bug?id=32f2c12af079a07cd40954eb45249e8aabc1fbc2
// 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/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_bpf
#define __NR_bpf 321
#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;
}

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);
      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:
    syscall(__NR_socket, /*domain=*/0x26ul, /*type=*/5ul, /*proto=*/0);
    break;
  case 1:
    syscall(__NR_sendmsg, /*fd=*/-1, /*msg=*/0ul, /*f=*/0ul);
    break;
  case 2:
    res = syscall(__NR_socket, /*domain=*/0xaul, /*type=*/3ul, /*proto=*/2);
    if (res != -1)
      r[0] = res;
    break;
  case 3:
    memcpy((void*)0x20000b00,
           "raw\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
           "\000\000\000\000\000\000\000\000\000\000\000\000\000",
           32);
    *(uint32_t*)0x20000b20 = 8;
    *(uint32_t*)0x20000b24 = 3;
    *(uint32_t*)0x20000b28 = 0x428;
    *(uint32_t*)0x20000b2c = 0xd0;
    *(uint32_t*)0x20000b30 = -1;
    *(uint32_t*)0x20000b34 = -1;
    *(uint32_t*)0x20000b38 = 0;
    *(uint32_t*)0x20000b3c = -1;
    *(uint32_t*)0x20000b40 = 0x358;
    *(uint32_t*)0x20000b44 = -1;
    *(uint32_t*)0x20000b48 = -1;
    *(uint32_t*)0x20000b4c = 0x358;
    *(uint32_t*)0x20000b50 = -1;
    *(uint32_t*)0x20000b54 = 3;
    *(uint64_t*)0x20000b58 = 0;
    *(uint8_t*)0x20000b60 = 0xfc;
    *(uint8_t*)0x20000b61 = 0;
    memset((void*)0x20000b62, 0, 13);
    *(uint8_t*)0x20000b6f = 0;
    *(uint8_t*)0x20000b70 = -1;
    *(uint8_t*)0x20000b71 = 2;
    memset((void*)0x20000b72, 0, 13);
    *(uint8_t*)0x20000b7f = 1;
    *(uint32_t*)0x20000b80 = htobe32(0);
    *(uint32_t*)0x20000b84 = htobe32(0);
    *(uint32_t*)0x20000b88 = htobe32(0);
    *(uint32_t*)0x20000b8c = htobe32(0);
    *(uint32_t*)0x20000b90 = htobe32(0);
    *(uint32_t*)0x20000b94 = htobe32(0);
    *(uint32_t*)0x20000b98 = htobe32(0);
    *(uint32_t*)0x20000b9c = htobe32(0);
    memcpy((void*)0x20000ba0, "veth0_macvtap\000\000\000", 16);
    memcpy((void*)0x20000bb0, "dvmrp1\000\000\000\000\000\000\000\000\000\000",
           16);
    *(uint8_t*)0x20000bc0 = 0;
    *(uint8_t*)0x20000bd0 = 0;
    *(uint16_t*)0x20000be0 = 0;
    *(uint8_t*)0x20000be2 = 0;
    *(uint8_t*)0x20000be3 = 0;
    *(uint8_t*)0x20000be4 = 0;
    *(uint32_t*)0x20000be8 = 0;
    *(uint16_t*)0x20000bec = 0xa8;
    *(uint16_t*)0x20000bee = 0xd0;
    *(uint32_t*)0x20000bf0 = 0;
    *(uint64_t*)0x20000bf8 = 0;
    *(uint64_t*)0x20000c00 = 0;
    *(uint16_t*)0x20000c08 = 0x28;
    memcpy((void*)0x20000c0a,
           "NFQUEUE\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
           "\000\000\000\000\000\000\000",
           29);
    *(uint8_t*)0x20000c27 = 0;
    *(uint16_t*)0x20000c28 = 0;
    *(uint8_t*)0x20000c30 = 0xfe;
    *(uint8_t*)0x20000c31 = 0x80;
    memset((void*)0x20000c32, 0, 13);
    *(uint8_t*)0x20000c3f = 0xbb;
    memset((void*)0x20000c40, 0, 10);
    memset((void*)0x20000c4a, 255, 2);
    *(uint8_t*)0x20000c4c = 0xac;
    *(uint8_t*)0x20000c4d = 0x14;
    *(uint8_t*)0x20000c4e = 0x14;
    *(uint8_t*)0x20000c4f = 0;
    *(uint32_t*)0x20000c50 = htobe32(0);
    *(uint32_t*)0x20000c54 = htobe32(0);
    *(uint32_t*)0x20000c58 = htobe32(0);
    *(uint32_t*)0x20000c5c = htobe32(0);
    *(uint32_t*)0x20000c60 = htobe32(0);
    *(uint32_t*)0x20000c64 = htobe32(0);
    *(uint32_t*)0x20000c68 = htobe32(0);
    *(uint32_t*)0x20000c6c = htobe32(0);
    memcpy((void*)0x20000c70,
           "wg1\000\000\000\000\000\000\000\000\000\000\000\000\000", 16);
    memcpy((void*)0x20000c80,
           "gre0\000\000\000\000\000\000\000\000\000\000\000\000", 16);
    *(uint8_t*)0x20000c90 = 0;
    *(uint8_t*)0x20000ca0 = 0;
    *(uint16_t*)0x20000cb0 = 0;
    *(uint8_t*)0x20000cb2 = 0;
    *(uint8_t*)0x20000cb3 = 0;
    *(uint8_t*)0x20000cb4 = 0;
    *(uint32_t*)0x20000cb8 = 0;
    *(uint16_t*)0x20000cbc = 0x258;
    *(uint16_t*)0x20000cbe = 0x288;
    *(uint32_t*)0x20000cc0 = 0;
    *(uint64_t*)0x20000cc8 = 0;
    *(uint64_t*)0x20000cd0 = 0;
    *(uint16_t*)0x20000cd8 = 0x58;
    memcpy((void*)0x20000cda,
           "hashlimit\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
           "\000\000\000\000\000\000",
           29);
    *(uint8_t*)0x20000cf7 = 1;
    memcpy((void*)0x20000cf8, "pim6reg\000\000\000\000\000\000\000\000\000",
           16);
    *(uint32_t*)0x20000d08 = 0;
    *(uint32_t*)0x20000d0c = 0;
    *(uint32_t*)0x20000d10 = 5;
    *(uint32_t*)0x20000d14 = 0;
    *(uint32_t*)0x20000d18 = 0;
    *(uint32_t*)0x20000d1c = 7;
    *(uint32_t*)0x20000d20 = 0x3ff;
    *(uint8_t*)0x20000d24 = 0;
    *(uint8_t*)0x20000d25 = 0;
    *(uint64_t*)0x20000d28 = 0;
    *(uint16_t*)0x20000d30 = 0x158;
    memcpy((void*)0x20000d32,
           "hashlimit\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
           "\000\000\000\000\000\000",
           29);
    *(uint8_t*)0x20000d4f = 3;
    memcpy(
        (void*)0x20000d50,
        "wg1\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
        "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000",
        255);
    *(uint64_t*)0x20000e50 = 3;
    *(uint64_t*)0x20000e58 = 0;
    *(uint32_t*)0x20000e60 = 0x41;
    *(uint32_t*)0x20000e64 = 0;
    *(uint32_t*)0x20000e68 = 0;
    *(uint32_t*)0x20000e6c = 0x1000;
    *(uint32_t*)0x20000e70 = 6;
    *(uint32_t*)0x20000e74 = 3;
    *(uint8_t*)0x20000e78 = 0;
    *(uint8_t*)0x20000e79 = 0;
    *(uint64_t*)0x20000e80 = 0;
    *(uint16_t*)0x20000e88 = 0x30;
    memcpy((void*)0x20000e8a,
           "CONNMARK\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
           "\000\000\000\000\000\000\000",
           29);
    *(uint8_t*)0x20000ea7 = 1;
    *(uint32_t*)0x20000ea8 = 0;
    *(uint32_t*)0x20000eac = 0;
    *(uint32_t*)0x20000eb0 = 0;
    *(uint8_t*)0x20000eb4 = 0;
    memset((void*)0x20000eb8, 0, 136);
    *(uint32_t*)0x20000f40 = 0;
    *(uint16_t*)0x20000f44 = 0xa8;
    *(uint16_t*)0x20000f46 = 0xd0;
    *(uint32_t*)0x20000f48 = 0;
    *(uint64_t*)0x20000f50 = 0;
    *(uint64_t*)0x20000f58 = 0;
    *(uint16_t*)0x20000f60 = 0x28;
    memset((void*)0x20000f62, 0, 29);
    *(uint8_t*)0x20000f7f = 7;
    *(uint32_t*)0x20000f80 = 0xfffffffe;
    syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0x29, /*opt=*/0x40,
            /*val=*/0x20000b00ul, /*len=*/0x488ul);
    break;
  case 4:
    memcpy((void*)0x20000000,
           "\x8f\xed\xcb\x79\x07\x00\x98\x75\xf3\x75\x38\xe4\x86\xdd\x63\x17"
           "\xce\x62\x03\xc2\x3c\x00\xfe\x80\x00\x00\x00\x00\x00\x00\x87\x5a"
           "\x65\x96\x9f\xf5\x7b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
           "\x00\x00\xac\x14\x14\xaa\x2c",
           55);
    syscall(__NR_write, /*fd=*/-1, /*buf=*/0x20000000ul, /*len=*/0xfdeful);
    break;
  case 5:
    *(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 = 0;
    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 = 0;
    *(uint64_t*)0x200001b8 = 0;
    *(uint64_t*)0x200001c0 = 0;
    *(uint32_t*)0x200001c8 = 0x10;
    *(uint32_t*)0x200001cc = 0;
    *(uint32_t*)0x200001d0 = 0;
    syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000140ul, /*size=*/0x90ul);
    break;
  case 6:
    *(uint32_t*)0x20000440 = 6;
    *(uint32_t*)0x20000444 = 3;
    *(uint64_t*)0x20000448 = 0x20000680;
    *(uint64_t*)0x20000450 = 0x200002c0;
    memcpy((void*)0x200002c0, "GPL\000", 4);
    *(uint32_t*)0x20000458 = 0;
    *(uint32_t*)0x2000045c = 0;
    *(uint64_t*)0x20000460 = 0;
    *(uint32_t*)0x20000468 = 0;
    *(uint32_t*)0x2000046c = 0;
    memset((void*)0x20000470, 0, 16);
    *(uint32_t*)0x20000480 = 0;
    *(uint32_t*)0x20000484 = 0x25;
    *(uint32_t*)0x20000488 = -1;
    *(uint32_t*)0x2000048c = 8;
    *(uint64_t*)0x20000490 = 0;
    *(uint32_t*)0x20000498 = 0;
    *(uint32_t*)0x2000049c = 0x10;
    *(uint64_t*)0x200004a0 = 0;
    *(uint32_t*)0x200004a8 = 0;
    *(uint32_t*)0x200004ac = 0;
    *(uint32_t*)0x200004b0 = 0;
    *(uint32_t*)0x200004b4 = 0;
    *(uint64_t*)0x200004b8 = 0;
    *(uint64_t*)0x200004c0 = 0;
    *(uint32_t*)0x200004c8 = 0x10;
    *(uint32_t*)0x200004cc = 0;
    *(uint32_t*)0x200004d0 = 0;
    res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000440ul, /*size=*/0x94ul);
    if (res != -1)
      r[1] = res;
    break;
  case 7:
    *(uint32_t*)0x20000600 = r[1];
    *(uint32_t*)0x20000604 = 5;
    *(uint32_t*)0x20000608 = 0xb68;
    *(uint32_t*)0x2000060c = 0;
    *(uint64_t*)0x20000610 = 0x20000000;
    memset((void*)0x20000000, 37, 1);
    *(uint64_t*)0x20000618 = 0;
    *(uint32_t*)0x20000620 = 0xd01;
    *(uint32_t*)0x20000624 = 0;
    *(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;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}