// https://syzkaller.appspot.com/bug?id=33965bc983eb2f2b7897d86580995f82f74ceadf
// 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;
}

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");
}

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;
    }
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, /*domain=*/2ul, /*type=*/2ul, /*proto=*/0x88);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x200006c0,
         "lo\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16);
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933, /*arg=*/0x200006c0ul);
  if (res != -1)
    r[1] = *(uint32_t*)0x200006d0;
  res = syscall(__NR_socket, /*domain=AF_NETLINK*/ 0x10ul,
                /*type=SOCK_RAW*/ 3ul, /*proto=*/0);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x200007c0 = 0;
  *(uint32_t*)0x200007c8 = 0;
  *(uint64_t*)0x200007d0 = 0x20000780;
  *(uint64_t*)0x20000780 = 0x20000080;
  *(uint32_t*)0x20000080 = 0x48;
  *(uint16_t*)0x20000084 = 0x24;
  *(uint16_t*)0x20000086 = 0xd0b;
  *(uint32_t*)0x20000088 = 0;
  *(uint32_t*)0x2000008c = 0;
  *(uint8_t*)0x20000090 = 0;
  *(uint8_t*)0x20000091 = 0;
  *(uint16_t*)0x20000092 = 0;
  *(uint32_t*)0x20000094 = r[1];
  *(uint16_t*)0x20000098 = 0;
  *(uint16_t*)0x2000009a = 0;
  *(uint16_t*)0x2000009c = -1;
  *(uint16_t*)0x2000009e = -1;
  *(uint16_t*)0x200000a0 = 0;
  *(uint16_t*)0x200000a2 = 0;
  *(uint16_t*)0x200000a4 = 8;
  *(uint16_t*)0x200000a6 = 1;
  memcpy((void*)0x200000a8, "cbs\000", 4);
  *(uint16_t*)0x200000ac = 0x1c;
  *(uint16_t*)0x200000ae = 2;
  *(uint16_t*)0x200000b0 = 0x18;
  *(uint16_t*)0x200000b2 = 1;
  *(uint8_t*)0x200000b4 = 0;
  memset((void*)0x200000b5, 0, 3);
  *(uint32_t*)0x200000b8 = 0;
  *(uint32_t*)0x200000bc = 0;
  *(uint32_t*)0x200000c0 = 0;
  *(uint32_t*)0x200000c4 = 0;
  *(uint64_t*)0x20000788 = 0x48;
  *(uint64_t*)0x200007d8 = 1;
  *(uint64_t*)0x200007e0 = 0x8100000018000000;
  *(uint64_t*)0x200007e8 = 0;
  *(uint32_t*)0x200007f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x200007c0ul, /*f=*/0ul);
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=*/1ul, /*proto=*/0);
  if (res != -1)
    r[3] = res;
  *(uint32_t*)0x20000000 = 0xbf;
  syscall(__NR_setsockopt, /*fd=*/r[3], /*level=*/6,
          /*optname=TCP_WINDOW_CLAMP*/ 0xa, /*optval=*/0x20000000ul,
          /*optlen=*/4ul);
  *(uint16_t*)0x20d84000 = 0xa;
  *(uint16_t*)0x20d84002 = htobe16(2);
  *(uint32_t*)0x20d84004 = htobe32(0);
  *(uint64_t*)0x20d84008 = htobe64(0);
  *(uint64_t*)0x20d84010 = htobe64(1);
  *(uint32_t*)0x20d84018 = 0;
  syscall(__NR_bind, /*fd=*/r[3], /*addr=*/0x20d84000ul, /*addrlen=*/0x1cul);
  *(uint32_t*)0x20000200 = 1;
  syscall(__NR_setsockopt, /*fd=*/r[3], /*level=*/6,
          /*optname=TCP_FASTOPEN_NO_COOKIE*/ 0x22, /*optval=*/0x20000200ul,
          /*optlen=*/4ul);
  memcpy((void*)0x200000c0,
         "\x04\x4a\xac\x2f\x20\x2c\x5f\xed\xa7\x1e\x03\x9a\x57\xa9\x30\x88\xfd"
         "\xcc\xe4\xaf\xe2\x8a\xac\x61\x83\x77\x92\x74\x1a\x19\x06\x70\xcc\xbe"
         "\x1a\x2b\x00\xaa\x77\xa8\x7d\x56\xa3\xf1\x2c\x79\x20\xad\x02\x92\x8a"
         "\x5d\x10\x14\xe5\xb8\x96\xf0\x00\xfc\xf6\x52\x19\x28\x48\x0b\xe9\xaf"
         "\x82\x61\x3a\x5c\x66\x1f\x41\x10\xad\xba\x35\x8a\xfd\x8b\x5b\x4e\xf1"
         "\x70\x20\x51\xe3\x93\xed\xe2\x69\x81\x12\xa1\xf1\xbd\xf1\xd0\xf5\x68"
         "\x54\x6e\xd3\x22\xab\x4c\x53\x54\x5b\xd2\xcd\x6e\x48\x52\x2f\x0c\x15"
         "\x4c\xb3\xc6\x86\x4d\xc3\x0a\xe9\x21\xdb\x10\x0f\x1e\xe9\x7a\x23\x45"
         "\x03\x33\x8f\x8f\xdf\x35\x64\x72\xda\x0c\x7a\xb6\x2f\x27\x4f\x34",
         152);
  *(uint16_t*)0x20b63fe4 = 0xa;
  *(uint16_t*)0x20b63fe6 = htobe16(2);
  *(uint32_t*)0x20b63fe8 = htobe32(0);
  memset((void*)0x20b63fec, 0, 16);
  *(uint32_t*)0x20b63ffc = 0;
  syscall(__NR_sendto, /*fd=*/r[3], /*buf=*/0x200000c0ul,
          /*len=*/0x116d962d5f73552ul,
          /*f=MSG_FASTOPEN|MSG_OOB|MSG_DONTWAIT|MSG_DONTROUTE|MSG_CONFIRM*/
          0x20000845ul, /*addr=*/0x20b63fe4ul, /*addrlen=*/0x1cul);
  syscall(__NR_shutdown, /*fd=*/r[3], /*how=SHUT_WR*/ 1ul);
  *(uint64_t*)0x20000bc0 = 0;
  *(uint32_t*)0x20000bc8 = 0;
  *(uint64_t*)0x20000bd0 = 0x20000400;
  *(uint64_t*)0x20000400 = 0x20000c00;
  *(uint64_t*)0x20000408 = 0xd80;
  *(uint64_t*)0x20000bd8 = 1;
  *(uint64_t*)0x20000be0 = 0;
  *(uint64_t*)0x20000be8 = 0;
  *(uint32_t*)0x20000bf0 = 0;
  *(uint32_t*)0x20000bf8 = 0;
  syscall(__NR_recvmmsg, /*fd=*/r[3], /*mmsg=*/0x20000bc0ul, /*vlen=*/1ul,
          /*f=MSG_WAITALL|MSG_TRUNC|MSG_PEEK*/ 0x122ul, /*timeout=*/0ul);
}
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);
  loop();
  return 0;
}