// https://syzkaller.appspot.com/bug?id=b3bf3714238896727b6268c2809710bedb7f21d3
// 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))))

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 (;;) {
      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_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0xc);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000000 = 0;
  *(uint32_t*)0x20000008 = 0;
  *(uint64_t*)0x20000010 = 0x200004c0;
  *(uint64_t*)0x200004c0 = 0x20000d40;
  *(uint32_t*)0x20000d40 = 0x60;
  *(uint8_t*)0x20000d44 = 2;
  *(uint8_t*)0x20000d45 = 6;
  *(uint16_t*)0x20000d46 = 5;
  *(uint32_t*)0x20000d48 = 0;
  *(uint32_t*)0x20000d4c = 0;
  *(uint8_t*)0x20000d50 = 0;
  *(uint8_t*)0x20000d51 = 0;
  *(uint16_t*)0x20000d52 = htobe16(0);
  *(uint16_t*)0x20000d54 = 0xe;
  *(uint16_t*)0x20000d56 = 3;
  memcpy((void*)0x20000d58, "bitmap:ip\000", 10);
  *(uint16_t*)0x20000d64 = 5;
  *(uint16_t*)0x20000d66 = 4;
  *(uint8_t*)0x20000d68 = 0;
  *(uint16_t*)0x20000d6c = 9;
  *(uint16_t*)0x20000d6e = 2;
  memcpy((void*)0x20000d70, "syz1\000", 5);
  *(uint16_t*)0x20000d78 = 0x18;
  STORE_BY_BITMASK(uint16_t, , 0x20000d7a, 7, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000d7b, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000d7b, 1, 7, 1);
  *(uint16_t*)0x20000d7c = 5;
  *(uint16_t*)0x20000d7e = 3;
  *(uint8_t*)0x20000d80 = 0x1f;
  *(uint16_t*)0x20000d84 = 0xc;
  STORE_BY_BITMASK(uint16_t, , 0x20000d86, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000d87, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000d87, 1, 7, 1);
  *(uint16_t*)0x20000d88 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20000d8a, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000d8b, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000d8b, 0, 7, 1);
  *(uint32_t*)0x20000d8c = htobe32(-1);
  *(uint16_t*)0x20000d90 = 5;
  *(uint16_t*)0x20000d92 = 5;
  *(uint8_t*)0x20000d94 = 2;
  *(uint16_t*)0x20000d98 = 5;
  *(uint16_t*)0x20000d9a = 1;
  *(uint8_t*)0x20000d9c = 6;
  *(uint64_t*)0x200004c8 = 0x60;
  *(uint64_t*)0x20000018 = 1;
  *(uint64_t*)0x20000020 = 0;
  *(uint64_t*)0x20000028 = 0;
  *(uint32_t*)0x20000030 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x20000000ul, /*f=*/0ul);
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0xc);
  if (res != -1)
    r[1] = res;
  *(uint64_t*)0x20000000 = 0;
  *(uint32_t*)0x20000008 = 0;
  *(uint64_t*)0x20000010 = 0x20000240;
  *(uint64_t*)0x20000240 = 0x20000040;
  *(uint32_t*)0x20000040 = 0x40;
  *(uint8_t*)0x20000044 = 9;
  *(uint8_t*)0x20000045 = 6;
  *(uint16_t*)0x20000046 = 0x201;
  *(uint32_t*)0x20000048 = 0;
  *(uint32_t*)0x2000004c = 0;
  *(uint8_t*)0x20000050 = 0;
  *(uint8_t*)0x20000051 = 0;
  *(uint16_t*)0x20000052 = htobe16(0);
  *(uint16_t*)0x20000054 = 9;
  *(uint16_t*)0x20000056 = 2;
  memcpy((void*)0x20000058, "syz1\000", 5);
  *(uint16_t*)0x20000060 = 5;
  *(uint16_t*)0x20000062 = 1;
  *(uint8_t*)0x20000064 = 7;
  *(uint16_t*)0x20000068 = 0x18;
  STORE_BY_BITMASK(uint16_t, , 0x2000006a, 7, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000006b, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000006b, 1, 7, 1);
  *(uint16_t*)0x2000006c = 0xc;
  STORE_BY_BITMASK(uint16_t, , 0x2000006e, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000006f, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000006f, 1, 7, 1);
  *(uint16_t*)0x20000070 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20000072, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000073, 1, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000073, 0, 7, 1);
  *(uint32_t*)0x20000074 = htobe32(0xfffffffe);
  *(uint16_t*)0x20000078 = 5;
  *(uint16_t*)0x2000007a = 3;
  *(uint8_t*)0x2000007c = 3;
  *(uint64_t*)0x20000248 = 0x40;
  *(uint64_t*)0x20000018 = 1;
  *(uint64_t*)0x20000020 = 0;
  *(uint64_t*)0x20000028 = 0;
  *(uint32_t*)0x20000030 = 0x10000047;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x20000000ul,
          /*f=MSG_ZEROCOPY|MSG_PROBE|MSG_DONTWAIT*/ 0x4000050ul);
}
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;
  loop();
  return 0;
}