// https://syzkaller.appspot.com/bug?id=d71f28b21dad3419f79cf010f30167620cb0cfff
// 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>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

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 (;;) {
      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[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  syscall(__NR_perf_event_open, /*attr=*/0ul, /*pid=*/0, /*cpu=*/0ul,
          /*group=*/-1, /*flags=*/0ul);
  memcpy((void*)0x20000180, "memory.events\000", 14);
  syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000180ul,
          /*flags=*/0x26e1ul, /*mode=*/0ul);
  syscall(__NR_socketpair, /*domain=*/1ul, /*type=*/1ul, /*proto=*/0,
          /*fds=*/0ul);
  *(uint64_t*)0x20000040 = 0;
  *(uint64_t*)0x20000048 = 0x20000380;
  *(uint32_t*)0x20000050 = 0;
  *(uint32_t*)0x20000054 = 0xd8;
  *(uint32_t*)0x20000058 = 0;
  *(uint32_t*)0x2000005c = 0x10000;
  syscall(__NR_bpf, /*cmd=*/0x12ul, /*arg=*/0x20000040ul, /*size=*/0x20ul);
  memcpy((void*)0x20000100, "memory.events\000", 14);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000100ul,
                /*flags=*/0x100002ul, /*mode=*/0ul);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000040 = 0;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x4030582a, /*period=*/0x20000040ul);
  syscall(__NR_perf_event_open, /*attr=*/0ul, /*pid=*/0, /*cpu=*/0ul,
          /*group=*/-1, /*flags=PERF_FLAG_FD_CLOEXEC*/ 8ul);
  *(uint32_t*)0x20000fc0 = 0xc;
  *(uint32_t*)0x20000fc4 = 0x1a;
  *(uint64_t*)0x20000fc8 = 0;
  *(uint64_t*)0x20000fd0 = 0x20000000;
  memcpy((void*)0x20000000, "syzkaller\000", 10);
  *(uint32_t*)0x20000fd8 = 0xaa;
  *(uint32_t*)0x20000fdc = 0;
  *(uint64_t*)0x20000fe0 = 0;
  *(uint32_t*)0x20000fe8 = 0x40e00;
  *(uint32_t*)0x20000fec = 0;
  memset((void*)0x20000ff0, 0, 16);
  *(uint32_t*)0x20001000 = 0;
  *(uint32_t*)0x20001004 = 5;
  *(uint32_t*)0x20001008 = -1;
  *(uint32_t*)0x2000100c = 8;
  *(uint64_t*)0x20001010 = 0;
  *(uint32_t*)0x20001018 = 0;
  *(uint32_t*)0x2000101c = 0x10;
  *(uint64_t*)0x20001020 = 0x20000a40;
  *(uint32_t*)0x20000a40 = 1;
  *(uint32_t*)0x20000a44 = 0x10;
  *(uint32_t*)0x20000a48 = 9;
  *(uint32_t*)0x20000a4c = 2;
  *(uint32_t*)0x20001028 = 0x10;
  *(uint32_t*)0x2000102c = 0;
  *(uint32_t*)0x20001030 = -1;
  *(uint32_t*)0x20001034 = 5;
  *(uint64_t*)0x20001038 = 0;
  *(uint64_t*)0x20001040 = 0x20000f40;
  *(uint32_t*)0x20000f40 = 5;
  *(uint32_t*)0x20000f44 = 4;
  *(uint32_t*)0x20000f48 = 9;
  *(uint32_t*)0x20000f4c = 3;
  *(uint32_t*)0x20000f50 = 3;
  *(uint32_t*)0x20000f54 = 4;
  *(uint32_t*)0x20000f58 = 7;
  *(uint32_t*)0x20000f5c = 8;
  *(uint32_t*)0x20000f60 = 3;
  *(uint32_t*)0x20000f64 = 4;
  *(uint32_t*)0x20000f68 = 0xf;
  *(uint32_t*)0x20000f6c = 8;
  *(uint32_t*)0x20000f70 = 1;
  *(uint32_t*)0x20000f74 = 5;
  *(uint32_t*)0x20000f78 = 7;
  *(uint32_t*)0x20000f7c = 6;
  *(uint32_t*)0x20000f80 = 2;
  *(uint32_t*)0x20000f84 = 5;
  *(uint32_t*)0x20000f88 = 3;
  *(uint32_t*)0x20000f8c = 1;
  *(uint32_t*)0x20001048 = 0x10;
  *(uint32_t*)0x2000104c = 5;
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000fc0ul, /*size=*/0x90ul);
}
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;
}