// https://syzkaller.appspot.com/bug?id=d91e323ce924658204882ab5ac5baf5bfebf932d
// 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.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/loop.h>

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 long syz_open_dev(long a0, long a1, 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 {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

struct fs_image_segment {
  void* data;
  uintptr_t size;
  uintptr_t offset;
};

#define IMAGE_MAX_SEGMENTS 4096
#define IMAGE_MAX_SIZE (129 << 20)

#define SYZ_memfd_create 319

static long syz_read_part_table(unsigned long size, unsigned long nsegs,
                                long segments)
{
  char loopname[64], linkname[64];
  int loopfd, err = 0, res = -1;
  unsigned long i, j;
  struct fs_image_segment* segs = (struct fs_image_segment*)segments;
  if (nsegs > IMAGE_MAX_SEGMENTS)
    nsegs = IMAGE_MAX_SEGMENTS;
  for (i = 0; i < nsegs; i++) {
    if (segs[i].size > IMAGE_MAX_SIZE)
      segs[i].size = IMAGE_MAX_SIZE;
    segs[i].offset %= IMAGE_MAX_SIZE;
    if (segs[i].offset > IMAGE_MAX_SIZE - segs[i].size)
      segs[i].offset = IMAGE_MAX_SIZE - segs[i].size;
    if (size < segs[i].offset + segs[i].offset)
      size = segs[i].offset + segs[i].offset;
  }
  if (size > IMAGE_MAX_SIZE)
    size = IMAGE_MAX_SIZE;
  int memfd = syscall(SYZ_memfd_create, "syz_read_part_table", 0);
  if (memfd == -1) {
    err = errno;
    goto error;
  }
  if (ftruncate(memfd, size)) {
    err = errno;
    goto error_close_memfd;
  }
  for (i = 0; i < nsegs; i++) {
    if (pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset) < 0) {
    }
  }
  snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
  loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    err = errno;
    goto error_close_memfd;
  }
  if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
    if (errno != EBUSY) {
      err = errno;
      goto error_close_loop;
    }
    ioctl(loopfd, LOOP_CLR_FD, 0);
    usleep(1000);
    if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
      err = errno;
      goto error_close_loop;
    }
  }
  struct loop_info64 info;
  if (ioctl(loopfd, LOOP_GET_STATUS64, &info)) {
    err = errno;
    goto error_clear_loop;
  }
  info.lo_flags |= LO_FLAGS_PARTSCAN;
  if (ioctl(loopfd, LOOP_SET_STATUS64, &info)) {
    err = errno;
    goto error_clear_loop;
  }
  res = 0;
  for (i = 1, j = 0; i < 8; i++) {
    snprintf(loopname, sizeof(loopname), "/dev/loop%llup%d", procid, (int)i);
    struct stat statbuf;
    if (stat(loopname, &statbuf) == 0) {
      snprintf(linkname, sizeof(linkname), "./file%d", (int)j++);
      if (symlink(loopname, linkname)) {
      }
    }
  }
error_clear_loop:
  ioctl(loopfd, LOOP_CLR_FD, 0);
error_close_loop:
  close(loopfd);
error_close_memfd:
  close(memfd);
error:
  errno = err;
  return res;
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  int i;
  for (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) {
  }
}

#define SYZ_HAVE_RESET_LOOP 1
static void reset_loop()
{
  char buf[64];
  snprintf(buf, sizeof(buf), "/dev/loop%llu", procid);
  int loopfd = open(buf, O_RDWR);
  if (loopfd != -1) {
    ioctl(loopfd, LOOP_CLR_FD, 0);
    close(loopfd);
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    reset_loop();
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      reset_test();
      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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[2] = {0x0, 0xffffffffffffffff};

void execute_one(void)
{
  long res = 0;
  *(uint32_t*)0x200000c0 = -1;
  *(uint32_t*)0x200000c4 = 3;
  *(uint32_t*)0x200000c8 = 0x7f;
  *(uint32_t*)0x200000cc = 0;
  *(uint32_t*)0x200000d0 = 0;
  *(uint8_t*)0x200000d4 = 0;
  *(uint8_t*)0x200000d5 = 0;
  *(uint8_t*)0x200000d6 = 0;
  *(uint8_t*)0x200000d7 = 0;
  *(uint8_t*)0x200000d8 = 0;
  *(uint8_t*)0x200000d9 = 0;
  *(uint8_t*)0x200000da = 0;
  *(uint8_t*)0x200000db = 0;
  *(uint8_t*)0x200000dc = 0;
  *(uint8_t*)0x200000dd = 0;
  *(uint8_t*)0x200000de = 0;
  *(uint8_t*)0x200000df = 0;
  *(uint8_t*)0x200000e0 = 0;
  *(uint8_t*)0x200000e1 = 0;
  *(uint8_t*)0x200000e2 = 0;
  *(uint8_t*)0x200000e3 = 0;
  *(uint8_t*)0x200000e4 = 0;
  *(uint8_t*)0x200000e5 = 0;
  *(uint8_t*)0x200000e6 = 0;
  *(uint8_t*)0x200000e7 = 0;
  *(uint8_t*)0x200000e8 = 0;
  *(uint8_t*)0x200000e9 = 0;
  *(uint8_t*)0x200000ea = 0;
  *(uint8_t*)0x200000eb = 0;
  *(uint8_t*)0x200000ec = 0;
  *(uint8_t*)0x200000ed = 0;
  *(uint8_t*)0x200000ee = 0;
  *(uint8_t*)0x200000ef = 0;
  *(uint8_t*)0x200000f0 = 0;
  *(uint8_t*)0x200000f1 = 0;
  *(uint8_t*)0x200000f2 = 0;
  *(uint8_t*)0x200000f3 = 0;
  syscall(__NR_ioctl, -1, 0x40345410, 0x200000c0);
  res = syscall(__NR_fcntl, -1, 0x10, 0x20000140);
  if (res != -1)
    r[0] = *(uint32_t*)0x20000144;
  *(uint32_t*)0x20000240 = 2;
  *(uint32_t*)0x20000244 = 7;
  *(uint32_t*)0x20000248 = 0;
  *(uint32_t*)0x2000024c = 0x81;
  memcpy((void*)0x20000250, "\x73\x79\x7a\x30\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\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00",
         44);
  *(uint32_t*)0x2000027c = 6;
  *(uint32_t*)0x20000280 = 5;
  *(uint32_t*)0x20000284 = 0x24;
  *(uint32_t*)0x20000288 = 0xfff;
  *(uint32_t*)0x2000028c = r[0];
  *(uint32_t*)0x20000290 = 9;
  *(uint32_t*)0x20000294 = 0;
  memcpy((void*)0x20000298,
         "\x73\x79\x7a\x30\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\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\x00\x00\x00\x00\x00\x00",
         64);
  *(uint64_t*)0x200002d8 = 0x20000180;
  memcpy((void*)0x20000180, "cgroup", 7);
  memcpy((void*)0x20000187, "/dev/input/mice", 16);
  memcpy((void*)0x20000197, "proc", 5);
  memcpy((void*)0x2000019c, "/dev/snd/controlC#", 19);
  memcpy((void*)0x200001af, "/dev/zero", 10);
  memcpy((void*)0x200001b9, "/dev/zero", 10);
  memcpy((void*)0x200001c3, "eth1", 5);
  memcpy((void*)0x200001c8, "/dev/input/mice", 16);
  memcpy((void*)0x200001d8, "/dev/input/mice", 16);
  *(uint32_t*)0x200002e0 = 0x68;
  *(uint8_t*)0x200002e4 = 0;
  *(uint8_t*)0x200002e5 = 0;
  *(uint8_t*)0x200002e6 = 0;
  *(uint8_t*)0x200002e7 = 0;
  *(uint8_t*)0x200002e8 = 0;
  *(uint8_t*)0x200002e9 = 0;
  *(uint8_t*)0x200002ea = 0;
  *(uint8_t*)0x200002eb = 0;
  *(uint8_t*)0x200002ec = 0;
  *(uint8_t*)0x200002ed = 0;
  *(uint8_t*)0x200002ee = 0;
  *(uint8_t*)0x200002ef = 0;
  *(uint8_t*)0x200002f0 = 0;
  *(uint8_t*)0x200002f1 = 0;
  *(uint8_t*)0x200002f2 = 0;
  *(uint8_t*)0x200002f3 = 0;
  *(uint8_t*)0x200002f4 = 0;
  *(uint8_t*)0x200002f5 = 0;
  *(uint8_t*)0x200002f6 = 0;
  *(uint8_t*)0x200002f7 = 0;
  *(uint8_t*)0x200002f8 = 0;
  *(uint8_t*)0x200002f9 = 0;
  *(uint8_t*)0x200002fa = 0;
  *(uint8_t*)0x200002fb = 0;
  *(uint8_t*)0x200002fc = 0;
  *(uint8_t*)0x200002fd = 0;
  *(uint8_t*)0x200002fe = 0;
  *(uint8_t*)0x200002ff = 0;
  *(uint8_t*)0x20000300 = 0;
  *(uint8_t*)0x20000301 = 0;
  *(uint8_t*)0x20000302 = 0;
  *(uint8_t*)0x20000303 = 0;
  *(uint8_t*)0x20000304 = 0;
  *(uint8_t*)0x20000305 = 0;
  *(uint8_t*)0x20000306 = 0;
  *(uint8_t*)0x20000307 = 0;
  *(uint8_t*)0x20000308 = 0;
  *(uint8_t*)0x20000309 = 0;
  *(uint8_t*)0x2000030a = 0;
  *(uint8_t*)0x2000030b = 0;
  *(uint8_t*)0x2000030c = 0;
  *(uint8_t*)0x2000030d = 0;
  *(uint8_t*)0x2000030e = 0;
  *(uint8_t*)0x2000030f = 0;
  *(uint16_t*)0x20000310 = 0x40;
  *(uint16_t*)0x20000312 = 6;
  *(uint16_t*)0x20000314 = 0x800;
  *(uint16_t*)0x20000316 = 0xfffd;
  syscall(__NR_ioctl, -1, 0xc1105517, 0x20000240);
  memcpy((void*)0x20000200, "/dev/input/mice", 16);
  res = syz_open_dev(0x20000200, 0, 0);
  if (res != -1)
    r[1] = res;
  *(uint64_t*)0x20000100 = 0x20000040;
  memcpy((void*)0x20000040,
         "\x02\x00\xa6\xff\xff\xff\x01\x00\x00\x00\xff\x07\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x55\xaa",
         64);
  *(uint64_t*)0x20000108 = 0x40;
  *(uint64_t*)0x20000110 = 0x1c0;
  syz_read_part_table(0x1000000000000003, 1, 0x20000100);
  *(uint32_t*)0x20001680 = 0xe8;
  syscall(__NR_getsockopt, r[1], 0, 0x10, 0x20001580, 0x20001680);
  *(uint32_t*)0x20000040 = 0xfffeffff;
  *(uint32_t*)0x20000044 = 0xe54;
  *(uint32_t*)0x20000048 = 5;
  *(uint32_t*)0x2000004c = 0x10000;
  syscall(__NR_setsockopt, -1, 0x10f, 0x87, 0x20000040, 0x10);
  memcpy((void*)0x20000080, "./file0", 8);
  syscall(__NR_openat, 0xffffff9c, 0x20000080, 0x8001a0, 0);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}