// https://syzkaller.appspot.com/bug?id=4f6ce6f5223c2c8e75c92ce8cb619b227a8b0277
// 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/socket.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/genetlink.h>
#include <linux/netlink.h>

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;
}

#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))))

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 long syz_genetlink_get_family_id(volatile long name)
{
  char buf[512] = {0};
  struct nlmsghdr* hdr = (struct nlmsghdr*)buf;
  struct genlmsghdr* genlhdr = (struct genlmsghdr*)NLMSG_DATA(hdr);
  struct nlattr* attr = (struct nlattr*)(genlhdr + 1);
  hdr->nlmsg_len =
      sizeof(*hdr) + sizeof(*genlhdr) + sizeof(*attr) + GENL_NAMSIZ;
  hdr->nlmsg_type = GENL_ID_CTRL;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
  genlhdr->cmd = CTRL_CMD_GETFAMILY;
  attr->nla_type = CTRL_ATTR_FAMILY_NAME;
  attr->nla_len = sizeof(*attr) + GENL_NAMSIZ;
  strncpy((char*)(attr + 1), (char*)name, GENL_NAMSIZ);
  struct iovec iov = {hdr, hdr->nlmsg_len};
  struct sockaddr_nl addr = {0};
  addr.nl_family = AF_NETLINK;
  int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (fd == -1) {
    return -1;
  }
  struct msghdr msg = {&addr, sizeof(addr), &iov, 1, NULL, 0, 0};
  if (sendmsg(fd, &msg, 0) == -1) {
    close(fd);
    return -1;
  }
  ssize_t n = recv(fd, buf, sizeof(buf), 0);
  close(fd);
  if (n <= 0) {
    return -1;
  }
  if (hdr->nlmsg_type != GENL_ID_CTRL) {
    return -1;
  }
  for (; (char*)attr < buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID)
      return *(uint16_t*)(attr + 1);
  }
  return -1;
}

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) {
  }
}

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;
  for (iter = 0;; 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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0x10);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000000, "TIPCv2\000", 7);
  res = syz_genetlink_get_family_id(0x20000000);
  if (res != -1)
    r[1] = res;
  *(uint64_t*)0x200000c0 = 0;
  *(uint32_t*)0x200000c8 = 0;
  *(uint64_t*)0x200000d0 = 0x20000080;
  *(uint64_t*)0x20000080 = 0x20000340;
  *(uint32_t*)0x20000340 = 0x120;
  *(uint16_t*)0x20000344 = r[1];
  *(uint16_t*)0x20000346 = 0xb03;
  *(uint32_t*)0x20000348 = 0;
  *(uint32_t*)0x2000034c = 0;
  *(uint8_t*)0x20000350 = 8;
  *(uint8_t*)0x20000351 = 0;
  *(uint16_t*)0x20000352 = 0;
  *(uint16_t*)0x20000354 = 0xa4;
  STORE_BY_BITMASK(uint16_t, , 0x20000356, 4, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000357, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000357, 1, 7, 1);
  *(uint16_t*)0x20000358 = 9;
  *(uint16_t*)0x2000035a = 1;
  memcpy((void*)0x2000035c, "syz1\000", 5);
  *(uint16_t*)0x20000364 = 0x44;
  STORE_BY_BITMASK(uint16_t, , 0x20000366, 7, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000367, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000367, 1, 7, 1);
  *(uint16_t*)0x20000368 = 8;
  *(uint16_t*)0x2000036a = 3;
  *(uint32_t*)0x2000036c = 0xa35;
  *(uint16_t*)0x20000370 = 8;
  *(uint16_t*)0x20000372 = 4;
  *(uint32_t*)0x20000374 = -1;
  *(uint16_t*)0x20000378 = 8;
  *(uint16_t*)0x2000037a = 3;
  *(uint32_t*)0x2000037c = 0x100;
  *(uint16_t*)0x20000380 = 8;
  *(uint16_t*)0x20000382 = 3;
  *(uint32_t*)0x20000384 = 2;
  *(uint16_t*)0x20000388 = 8;
  *(uint16_t*)0x2000038a = 1;
  *(uint32_t*)0x2000038c = 0x17;
  *(uint16_t*)0x20000390 = 8;
  *(uint16_t*)0x20000392 = 2;
  *(uint32_t*)0x20000394 = 0x7ff;
  *(uint16_t*)0x20000398 = 8;
  *(uint16_t*)0x2000039a = 3;
  *(uint32_t*)0x2000039c = 2;
  *(uint16_t*)0x200003a0 = 8;
  *(uint16_t*)0x200003a2 = 1;
  *(uint32_t*)0x200003a4 = 2;
  *(uint16_t*)0x200003a8 = 0x13;
  *(uint16_t*)0x200003aa = 1;
  memcpy((void*)0x200003ac, "broadcast-link\000", 15);
  *(uint16_t*)0x200003bc = 0x3c;
  STORE_BY_BITMASK(uint16_t, , 0x200003be, 7, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200003bf, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200003bf, 1, 7, 1);
  *(uint16_t*)0x200003c0 = 8;
  *(uint16_t*)0x200003c2 = 2;
  *(uint32_t*)0x200003c4 = 8;
  *(uint16_t*)0x200003c8 = 8;
  *(uint16_t*)0x200003ca = 3;
  *(uint32_t*)0x200003cc = 9;
  *(uint16_t*)0x200003d0 = 8;
  *(uint16_t*)0x200003d2 = 2;
  *(uint32_t*)0x200003d4 = 9;
  *(uint16_t*)0x200003d8 = 8;
  *(uint16_t*)0x200003da = 3;
  *(uint32_t*)0x200003dc = 0xcc;
  *(uint16_t*)0x200003e0 = 8;
  *(uint16_t*)0x200003e2 = 2;
  *(uint32_t*)0x200003e4 = 0x7f;
  *(uint16_t*)0x200003e8 = 8;
  *(uint16_t*)0x200003ea = 3;
  *(uint32_t*)0x200003ec = 0x1f;
  *(uint16_t*)0x200003f0 = 8;
  *(uint16_t*)0x200003f2 = 4;
  *(uint32_t*)0x200003f4 = 1;
  *(uint16_t*)0x200003f8 = 0x14;
  STORE_BY_BITMASK(uint16_t, , 0x200003fa, 9, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200003fb, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200003fb, 1, 7, 1);
  *(uint16_t*)0x200003fc = 8;
  *(uint16_t*)0x200003fe = 1;
  *(uint32_t*)0x20000400 = 0x12c8;
  *(uint16_t*)0x20000404 = 8;
  *(uint16_t*)0x20000406 = 1;
  *(uint32_t*)0x20000408 = 9;
  *(uint16_t*)0x2000040c = 0x54;
  STORE_BY_BITMASK(uint16_t, , 0x2000040e, 9, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000040f, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000040f, 1, 7, 1);
  *(uint16_t*)0x20000410 = 8;
  *(uint16_t*)0x20000412 = 1;
  *(uint32_t*)0x20000414 = 5;
  *(uint16_t*)0x20000418 = 8;
  *(uint16_t*)0x2000041a = 1;
  *(uint32_t*)0x2000041c = 0x1ff;
  *(uint16_t*)0x20000420 = 8;
  *(uint16_t*)0x20000422 = 2;
  *(uint32_t*)0x20000424 = 0x80;
  *(uint16_t*)0x20000428 = 8;
  *(uint16_t*)0x2000042a = 1;
  *(uint32_t*)0x2000042c = 6;
  *(uint16_t*)0x20000430 = 8;
  *(uint16_t*)0x20000432 = 1;
  *(uint32_t*)0x20000434 = 0;
  *(uint16_t*)0x20000438 = 8;
  *(uint16_t*)0x2000043a = 2;
  *(uint32_t*)0x2000043c = 0x7ff;
  *(uint16_t*)0x20000440 = 8;
  *(uint16_t*)0x20000442 = 1;
  *(uint32_t*)0x20000444 = 3;
  *(uint16_t*)0x20000448 = 8;
  *(uint16_t*)0x2000044a = 2;
  *(uint32_t*)0x2000044c = 0xb405;
  *(uint16_t*)0x20000450 = 8;
  *(uint16_t*)0x20000452 = 1;
  *(uint32_t*)0x20000454 = 7;
  *(uint16_t*)0x20000458 = 8;
  *(uint16_t*)0x2000045a = 2;
  *(uint32_t*)0x2000045c = 4;
  *(uint64_t*)0x20000088 = 0x120;
  *(uint64_t*)0x200000d8 = 1;
  *(uint64_t*)0x200000e0 = 0;
  *(uint64_t*)0x200000e8 = 0;
  *(uint32_t*)0x200000f0 = 0;
  syscall(__NR_sendmsg, r[0], 0x200000c0ul, 0x20004014ul);
}
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);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}