// https://syzkaller.appspot.com/bug?id=bee32f7e81ba30eaf1cab7be0d487780b5550e3a
// 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/mount.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_io_uring_setup
#define __NR_io_uring_setup 425
#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;
    }
  }
}

void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  prctl$PR_SET_MM_MAP arguments: [
  //    option: const = 0x23 (8 bytes)
  //    opt: const = 0xe (8 bytes)
  //    arg: ptr[in, prctl_mm_map] {
  //      prctl_mm_map {
  //        start_code: VMA[0x1000]
  //        end_code: VMA[0x1000]
  //        start_data: VMA[0x4000]
  //        end_data: VMA[0x4000]
  //        start_brk: VMA[0x2000]
  //        brk: VMA[0x3000]
  //        start_stack: VMA[0x1000]
  //        arg_start: VMA[0x3000]
  //        arg_end: VMA[0x2000]
  //        env_start: VMA[0x1000]
  //        env_end: VMA[0x2000]
  //        auxv: nil
  //        auxv_size: bytesize = 0x0 (4 bytes)
  //        exe_fd: fd (resource)
  //      }
  //    }
  //    len: bytesize = 0x68 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000080 = 0x200000ff0000;
  *(uint64_t*)0x200000000088 = 0x200000ffc000;
  *(uint64_t*)0x200000000090 = 0x200000ffc000;
  *(uint64_t*)0x200000000098 = 0x200000ffc000;
  *(uint64_t*)0x2000000000a0 = 0x20000000c000;
  *(uint64_t*)0x2000000000a8 = 0x200000ff8000;
  *(uint64_t*)0x2000000000b0 = 0x200000ff0000;
  *(uint64_t*)0x2000000000b8 = 0x200000ffb000;
  *(uint64_t*)0x2000000000c0 = 0x20000000b000;
  *(uint64_t*)0x2000000000c8 = 0x200000ffa000;
  *(uint64_t*)0x2000000000d0 = 0x200000ffa000;
  *(uint64_t*)0x2000000000d8 = 0;
  *(uint32_t*)0x2000000000e0 = 0;
  *(uint32_t*)0x2000000000e4 = -1;
  syscall(__NR_prctl, /*option=*/0x23ul, /*opt=*/0xeul,
          /*arg=*/0x200000000080ul, /*len=*/0x68ul, 0);
  //  sendmsg$NFT_BATCH arguments: [
  //    fd: sock_nl_netfilter (resource)
  //    msg: ptr[in, msghdr_netlink[nft_batch_msg]] {
  //      msghdr_netlink[nft_batch_msg] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: nil
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000080 = 0;
  *(uint32_t*)0x200000000088 = 0;
  *(uint64_t*)0x200000000090 = 0;
  *(uint64_t*)0x200000000098 = 1;
  *(uint64_t*)0x2000000000a0 = 0;
  *(uint64_t*)0x2000000000a8 = 0;
  *(uint32_t*)0x2000000000b0 = 0;
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x200000000080ul,
          /*f=*/0ul);
  //  io_uring_setup arguments: [
  //    entries: int32 = 0x56ab (4 bytes)
  //    params: ptr[inout, io_uring_params] {
  //      io_uring_params {
  //        sq_entries: int32 = 0x0 (4 bytes)
  //        cq_entries: int32 = 0x36d (4 bytes)
  //        flags: io_uring_setup_flags = 0xc002 (4 bytes)
  //        sq_thread_cpu: int32 = 0xc (4 bytes)
  //        sq_thread_idle: int32 = 0xa0002f5 (4 bytes)
  //        features: int32 = 0x0 (4 bytes)
  //        wq_fd: fd_io_uring (resource)
  //        resv: buffer: {00 00 00 00 00 00 00 00 00 00 00 00} (length 0xc)
  //        sq_off: io_sqring_offsets {
  //          head: int32 = 0x0 (4 bytes)
  //          tail: int32 = 0x0 (4 bytes)
  //          ring_mask: int32 = 0x0 (4 bytes)
  //          ring_entries: int32 = 0x0 (4 bytes)
  //          flags: int32 = 0x0 (4 bytes)
  //          dropped: int32 = 0x0 (4 bytes)
  //          array: int32 = 0x0 (4 bytes)
  //          resv1: int32 = 0x0 (4 bytes)
  //          user_addr: int64 = 0x0 (8 bytes)
  //        }
  //        cq_off: io_cqring_offsets {
  //          head: int32 = 0x0 (4 bytes)
  //          tail: int32 = 0x0 (4 bytes)
  //          ring_mask: int32 = 0x0 (4 bytes)
  //          ring_entries: int32 = 0x0 (4 bytes)
  //          overflow: int32 = 0x0 (4 bytes)
  //          cqes: int32 = 0x0 (4 bytes)
  //          flags: int32 = 0x0 (4 bytes)
  //          resv1: int32 = 0x0 (4 bytes)
  //          user_addr: int64 = 0x0 (8 bytes)
  //        }
  //      }
  //    }
  //  ]
  //  returns fd_io_uring
  *(uint32_t*)0x200000000044 = 0x36d;
  *(uint32_t*)0x200000000048 = 0xc002;
  *(uint32_t*)0x20000000004c = 0xc;
  *(uint32_t*)0x200000000050 = 0xa0002f5;
  *(uint32_t*)0x200000000058 = -1;
  memset((void*)0x20000000005c, 0, 12);
  syscall(__NR_io_uring_setup, /*entries=*/0x56ab, /*params=*/0x200000000040ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}