// https://syzkaller.appspot.com/bug?id=8bdc6beb892738993341bad2994c4123b527a58d
// 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;
}

#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))))

struct csum_inet {
  uint32_t acc;
};

static void csum_inet_init(struct csum_inet* csum)
{
  csum->acc = 0;
}

static void csum_inet_update(struct csum_inet* csum, const uint8_t* data,
                             size_t length)
{
  if (length == 0)
    return;
  size_t i = 0;
  for (; i < length - 1; i += 2)
    csum->acc += *(uint16_t*)&data[i];
  if (length & 1)
    csum->acc += le16toh((uint16_t)data[length - 1]);
  while (csum->acc > 0xffff)
    csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16);
}

static uint16_t csum_inet_digest(struct csum_inet* csum)
{
  return ~csum->acc;
}

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");
}

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

static void setup_leak()
{
  if (!write_file(KMEMLEAK_FILE, "scan"))
    exit(1);
  sleep(5);
  if (!write_file(KMEMLEAK_FILE, "scan"))
    exit(1);
  if (!write_file(KMEMLEAK_FILE, "clear"))
    exit(1);
}

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 (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    check_leaks();
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x20000140, "/dev/net/tun\000", 13);
  res =
      syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000140ul, 0x40841ul, 0ul);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x200000c0, "syzkaller1\000\000\000\000\000\000", 16);
  *(uint16_t*)0x200000d0 = 0x8c32;
  syscall(__NR_ioctl, r[0], 0x400454ca, 0x200000c0ul);
  res = syscall(__NR_socket, 2ul, 0xaul, 2);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000180, "syzkaller1\000\000\000\000\000\000", 16);
  *(uint8_t*)0x20000190 = 1;
  *(uint8_t*)0x20000191 = 0x80;
  *(uint8_t*)0x20000192 = 0xc2;
  *(uint8_t*)0x20000193 = 0;
  *(uint8_t*)0x20000194 = 0;
  *(uint8_t*)0x20000195 = 0;
  syscall(__NR_ioctl, r[1], 0x8914, 0x20000180ul);
  memset((void*)0x20000240, 255, 6);
  memcpy((void*)0x20000246, "\xe2\xd6\xc3\x3a\xed\x62", 6);
  *(uint16_t*)0x2000024c = htobe16(0x86dd);
  STORE_BY_BITMASK(uint8_t, , 0x2000024e, 0xa, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x2000024e, 6, 4, 4);
  memcpy((void*)0x2000024f, "\xa9\xf4\xdd", 3);
  *(uint16_t*)0x20000252 = htobe16(0x288);
  *(uint8_t*)0x20000254 = 0x3a;
  *(uint8_t*)0x20000255 = 1;
  *(uint8_t*)0x20000256 = 0xfe;
  *(uint8_t*)0x20000257 = 0x88;
  memset((void*)0x20000258, 0, 12);
  *(uint8_t*)0x20000264 = 0;
  *(uint8_t*)0x20000265 = 1;
  *(uint8_t*)0x20000266 = 0xfc;
  *(uint8_t*)0x20000267 = 2;
  memset((void*)0x20000268, 0, 13);
  *(uint8_t*)0x20000275 = 1;
  *(uint8_t*)0x20000276 = 0x6c;
  *(uint8_t*)0x20000277 = 4;
  *(uint8_t*)0x20000278 = 0;
  *(uint8_t*)0x20000279 = 0x3f;
  *(uint32_t*)0x2000027a = 0;
  *(uint8_t*)0x2000027e = -1;
  *(uint8_t*)0x2000027f = 1;
  memset((void*)0x20000280, 0, 13);
  *(uint8_t*)0x2000028d = 1;
  *(uint8_t*)0x2000028e = 0xfc;
  *(uint8_t*)0x2000028f = 1;
  memset((void*)0x20000290, 0, 13);
  *(uint8_t*)0x2000029d = 5;
  *(uint8_t*)0x2000029e = 4;
  *(uint8_t*)0x2000029f = 0;
  *(uint16_t*)0x200002a0 = htobe16(0);
  *(uint32_t*)0x200002a2 = htobe32(0);
  STORE_BY_BITMASK(uint8_t, , 0x200002a6, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200002a6, 6, 4, 4);
  memcpy((void*)0x200002a7, "\x7c\xd5\xa4", 3);
  *(uint16_t*)0x200002aa = htobe16(8);
  *(uint8_t*)0x200002ac = 0x59;
  *(uint8_t*)0x200002ad = -1;
  *(uint8_t*)0x200002ae = 0xfc;
  *(uint8_t*)0x200002af = 1;
  memset((void*)0x200002b0, 0, 13);
  *(uint8_t*)0x200002bd = 0;
  memset((void*)0x200002be, 0, 10);
  memset((void*)0x200002c8, 255, 2);
  *(uint32_t*)0x200002ca = htobe32(0x7f000001);
  *(uint8_t*)0x200002ce = 0x2b;
  *(uint8_t*)0x200002cf = 0x14;
  *(uint8_t*)0x200002d0 = 4;
  *(uint8_t*)0x200002d1 = 0xa;
  *(uint8_t*)0x200002d2 = -1;
  *(uint8_t*)0x200002d3 = 0x38;
  *(uint16_t*)0x200002d4 = 0x7fff;
  memcpy((void*)0x200002d6,
         " \001\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16);
  memset((void*)0x200002e6, 0, 10);
  memset((void*)0x200002f0, 255, 2);
  *(uint8_t*)0x200002f2 = 0xac;
  *(uint8_t*)0x200002f3 = 0x14;
  *(uint8_t*)0x200002f4 = 0x14;
  *(uint8_t*)0x200002f5 = 0x18;
  *(uint8_t*)0x200002f6 = 0xfe;
  *(uint8_t*)0x200002f7 = 0x88;
  memset((void*)0x200002f8, 0, 12);
  *(uint8_t*)0x20000304 = 1;
  *(uint8_t*)0x20000305 = 1;
  *(uint8_t*)0x20000306 = -1;
  *(uint8_t*)0x20000307 = 1;
  memset((void*)0x20000308, 0, 13);
  *(uint8_t*)0x20000315 = 1;
  memcpy((void*)0x20000316,
         " \001\000\000\000\000\000\000\000\000\000\000\000\000\000\001", 16);
  memcpy((void*)0x20000326,
         " \001\000\000\000\000\000\000\000\000\000\000\000\000\000\001", 16);
  *(uint64_t*)0x20000336 = htobe64(0);
  *(uint64_t*)0x2000033e = htobe64(1);
  *(uint8_t*)0x20000346 = -1;
  *(uint8_t*)0x20000347 = 1;
  memset((void*)0x20000348, 0, 13);
  *(uint8_t*)0x20000355 = 1;
  *(uint8_t*)0x20000356 = 0xfe;
  *(uint8_t*)0x20000357 = 0x80;
  memset((void*)0x20000358, 0, 13);
  *(uint8_t*)0x20000365 = 0x18;
  *(uint8_t*)0x20000366 = 0xfe;
  *(uint8_t*)0x20000367 = 0x80;
  memset((void*)0x20000368, 0, 13);
  *(uint8_t*)0x20000375 = 0x2d;
  *(uint8_t*)0x20000376 = 8;
  *(uint8_t*)0x20000377 = 6;
  memset((void*)0x20000378, 0, 6);
  *(uint8_t*)0x2000037e = 0xc1;
  *(uint8_t*)0x2000037f = 0;
  *(uint8_t*)0x20000380 = 0xc2;
  *(uint8_t*)0x20000381 = 4;
  *(uint32_t*)0x20000382 = htobe32(6);
  *(uint8_t*)0x20000386 = 7;
  *(uint8_t*)0x20000387 = 0x28;
  *(uint32_t*)0x20000388 = htobe32(1);
  *(uint8_t*)0x2000038c = 8;
  *(uint8_t*)0x2000038d = 7;
  *(uint16_t*)0x2000038e = 4;
  *(uint64_t*)0x20000390 = 2;
  *(uint64_t*)0x20000398 = -1;
  *(uint64_t*)0x200003a0 = 0x1d89;
  *(uint64_t*)0x200003a8 = 0;
  *(uint8_t*)0x200003b6 = 0x32;
  *(uint8_t*)0x200003b7 = 6;
  *(uint8_t*)0x200003b8 = 0;
  *(uint8_t*)0x200003b9 = 5;
  *(uint32_t*)0x200003ba = 0;
  *(uint8_t*)0x200003be = -1;
  *(uint8_t*)0x200003bf = 1;
  memset((void*)0x200003c0, 0, 13);
  *(uint8_t*)0x200003cd = 1;
  *(uint8_t*)0x200003ce = -1;
  *(uint8_t*)0x200003cf = 1;
  memset((void*)0x200003d0, 0, 13);
  *(uint8_t*)0x200003dd = 1;
  *(uint8_t*)0x200003de = 0xfe;
  *(uint8_t*)0x200003df = 0x80;
  memset((void*)0x200003e0, 0, 13);
  *(uint8_t*)0x200003ed = 0xbb;
  *(uint8_t*)0x200003ee = 0x29;
  *(uint8_t*)0x200003ef = 3;
  memset((void*)0x200003f0, 0, 6);
  *(uint8_t*)0x200003f6 = 0xc2;
  *(uint8_t*)0x200003f7 = 4;
  *(uint32_t*)0x200003f8 = htobe32(9);
  *(uint8_t*)0x200003fc = 0xc9;
  *(uint8_t*)0x200003fd = 0x10;
  *(uint8_t*)0x200003fe = 0xfe;
  *(uint8_t*)0x200003ff = 0x80;
  memset((void*)0x20000400, 0, 13);
  *(uint8_t*)0x2000040d = 0x42;
  *(uint8_t*)0x2000040e = 0x3b;
  *(uint8_t*)0x2000040f = 0xa;
  *(uint8_t*)0x20000410 = 1;
  *(uint8_t*)0x20000411 = 0;
  *(uint32_t*)0x20000412 = 0;
  *(uint8_t*)0x20000416 = 0xfe;
  *(uint8_t*)0x20000417 = 0x80;
  memset((void*)0x20000418, 0, 13);
  *(uint8_t*)0x20000425 = 0xbb;
  *(uint8_t*)0x20000426 = 0xfc;
  *(uint8_t*)0x20000427 = 2;
  memset((void*)0x20000428, 0, 13);
  *(uint8_t*)0x20000435 = 0;
  *(uint8_t*)0x20000436 = -1;
  *(uint8_t*)0x20000437 = 2;
  memset((void*)0x20000438, 0, 13);
  *(uint8_t*)0x20000445 = 1;
  *(uint8_t*)0x20000446 = 0xfe;
  *(uint8_t*)0x20000447 = 0x80;
  memset((void*)0x20000448, 0, 13);
  *(uint8_t*)0x20000455 = 0x25;
  *(uint8_t*)0x20000456 = 0xfc;
  *(uint8_t*)0x20000457 = 1;
  memset((void*)0x20000458, 0, 13);
  *(uint8_t*)0x20000465 = 1;
  *(uint8_t*)0x20000466 = 1;
  *(uint8_t*)0x20000467 = 0;
  memset((void*)0x20000468, 0, 6);
  *(uint8_t*)0x2000046e = 5;
  *(uint8_t*)0x2000046f = 0;
  *(uint8_t*)0x20000470 = 4;
  *(uint8_t*)0x20000471 = 1;
  *(uint8_t*)0x20000472 = 0x5c;
  *(uint8_t*)0x20000476 = 0x32;
  *(uint8_t*)0x20000477 = 2;
  memset((void*)0x20000478, 0, 6);
  *(uint8_t*)0x2000047e = 5;
  *(uint8_t*)0x2000047f = 2;
  *(uint16_t*)0x20000480 = htobe16(1);
  *(uint8_t*)0x20000482 = 0x80;
  *(uint8_t*)0x20000483 = 0;
  *(uint8_t*)0x20000484 = 0x1f;
  *(uint8_t*)0x20000485 = 0;
  *(uint8_t*)0x20000486 = 0;
  *(uint8_t*)0x20000487 = 1;
  *(uint8_t*)0x20000488 = 0;
  *(uint8_t*)0x20000489 = 0xc2;
  *(uint8_t*)0x2000048a = 4;
  *(uint32_t*)0x2000048b = htobe32(0);
  *(uint8_t*)0x2000048f = 0xc2;
  *(uint8_t*)0x20000490 = 4;
  *(uint32_t*)0x20000491 = htobe32(9);
  *(uint8_t*)0x20000496 = -1;
  *(uint8_t*)0x20000497 = 1;
  memset((void*)0x20000498, 0, 6);
  *(uint8_t*)0x2000049e = 1;
  *(uint8_t*)0x2000049f = 1;
  *(uint8_t*)0x200004a0 = 0;
  *(uint8_t*)0x200004a1 = 0;
  *(uint8_t*)0x200004a2 = 1;
  *(uint8_t*)0x200004a3 = 0;
  *(uint8_t*)0x200004a4 = 5;
  *(uint8_t*)0x200004a5 = 2;
  *(uint16_t*)0x200004a6 = htobe16(1);
  *(uint8_t*)0x200004a8 = 9;
  *(uint8_t*)0x200004a9 = 0;
  *(uint8_t*)0x200004aa = 4;
  *(uint8_t*)0x200004ab = 1;
  *(uint8_t*)0x200004ac = 0x81;
  *(uint8_t*)0x200004ae = 0x2c;
  *(uint8_t*)0x200004af = 8;
  *(uint8_t*)0x200004b0 = 4;
  *(uint8_t*)0x200004b1 = 4;
  *(uint8_t*)0x200004b2 = 1;
  *(uint8_t*)0x200004b3 = 0x50;
  *(uint16_t*)0x200004b4 = 2;
  memset((void*)0x200004b6, 0, 10);
  memset((void*)0x200004c0, 255, 2);
  *(uint32_t*)0x200004c2 = htobe32(0x7f000001);
  *(uint8_t*)0x200004c6 = 0xfc;
  *(uint8_t*)0x200004c7 = 2;
  memset((void*)0x200004c8, 0, 13);
  *(uint8_t*)0x200004d5 = 0;
  *(uint8_t*)0x200004d6 = 0xfc;
  *(uint8_t*)0x200004d7 = 1;
  memset((void*)0x200004d8, 0, 13);
  *(uint8_t*)0x200004e5 = 1;
  memcpy((void*)0x200004e6,
         " \001\000\000\000\000\000\000\000\000\000\000\000\000\000\001", 16);
  *(uint8_t*)0x200004f6 = 0x3b;
  *(uint8_t*)0x200004f7 = 0;
  *(uint8_t*)0x200004f8 = 0x81;
  STORE_BY_BITMASK(uint8_t, , 0x200004f9, 1, 0, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200004f9, 0, 1, 2);
  STORE_BY_BITMASK(uint8_t, , 0x200004f9, 0x10, 3, 5);
  *(uint32_t*)0x200004fa = 0x68;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x20000256, 16);
  csum_inet_update(&csum_1, (const uint8_t*)0x20000266, 16);
  uint32_t csum_1_chunk_2 = 0x60020000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 4);
  uint32_t csum_1_chunk_3 = 0x3a000000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x2000029e, 608);
  *(uint16_t*)0x200002a0 = csum_inet_digest(&csum_1);
  syscall(__NR_write, r[0], 0x20000240ul, 0x2beul);
}
int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  setup_leak();
  loop();
  return 0;
}