// https://syzkaller.appspot.com/bug?id=8e030beda49b8e549cfeb17ed369414ed27331e6
// 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 long syz_open_procfs(volatile long a0, volatile long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == -1) {
    snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1);
  } else {
    snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1);
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  return fd;
}

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)) {
  }
  //  mmap arguments: [
  //    addr: VMA[0xe7e000]
  //    len: len = 0xe7e000 (8 bytes)
  //    prot: mmap_prot = 0xfffffffffcffffff (8 bytes)
  //    flags: mmap_flags = 0x20031 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0xbe9f5000 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0xe7e000ul,
          /*prot=PROT_SEM|PROT_WRITE|PROT_READ|PROT_EXEC|0xfffffffffcfffff0*/
          0xfffffffffcfffffful,
          /*flags=MAP_STACK|MAP_FIXED|MAP_ANONYMOUS|MAP_SHARED*/ 0x20031ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0xbe9f5000ul);
  //  mmap arguments: [
  //    addr: VMA[0x200000]
  //    len: len = 0x200000 (8 bytes)
  //    prot: mmap_prot = 0x300000b (8 bytes)
  //    flags: mmap_flags = 0x204031 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0xec776000 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x200000ul,
          /*prot=PROT_GROWSUP|PROT_GROWSDOWN|PROT_SEM|PROT_WRITE|PROT_READ*/
          0x300000bul,
          /*flags=MAP_NORESERVE|MAP_FIXED|MAP_ANONYMOUS|MAP_SHARED|0x200000*/
          0x204031ul, /*fd=*/(intptr_t)-1, /*offset=*/0xec776000ul);
  //  sendmmsg$inet arguments: [
  //    fd: sock (resource)
  //    mmsg: ptr[in, array[mmsghdr_inet]] {
  //      array[mmsghdr_inet] {
  //        mmsghdr_inet {
  //          msg_hdr: msghdr_inet {
  //            msg_name: nil
  //            msg_namelen: len = 0x0 (4 bytes)
  //            pad = 0x0 (4 bytes)
  //            msg_iov: ptr[in, array[iovec[in, array[int8]]]] {
  //              array[iovec[in, array[int8]]] {
  //                iovec[in, array[int8]] {
  //                  addr: ptr[in, buffer] {
  //                    buffer: {ec 49 69 ce 12 ae e5 cb cb 87 44 8d 7b 8d 39 e5
  //                    91 f0 81 7d 13 f2 30 e3 60 36 31 a8 55 80 2b 48 3c}
  //                    (length 0x21)
  //                  }
  //                  len: len = 0x21 (8 bytes)
  //                }
  //              }
  //            }
  //            msg_iovlen: len = 0x1 (8 bytes)
  //            msg_control: nil
  //            msg_controllen: bytesize = 0x0 (8 bytes)
  //            msg_flags: const = 0x0 (4 bytes)
  //            pad = 0x0 (4 bytes)
  //          }
  //          msg_len: const = 0x0 (4 bytes)
  //          pad = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    vlen: len = 0x1 (8 bytes)
  //    f: send_flags = 0x20000800 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000300 = 0;
  *(uint32_t*)0x200000000308 = 0;
  *(uint64_t*)0x200000000310 = 0x200000000280;
  *(uint64_t*)0x200000000280 = 0x2000000001c0;
  memcpy((void*)0x2000000001c0,
         "\xec\x49\x69\xce\x12\xae\xe5\xcb\xcb\x87\x44\x8d\x7b\x8d\x39\xe5\x91"
         "\xf0\x81\x7d\x13\xf2\x30\xe3\x60\x36\x31\xa8\x55\x80\x2b\x48\x3c",
         33);
  *(uint64_t*)0x200000000288 = 0x21;
  *(uint64_t*)0x200000000318 = 1;
  *(uint64_t*)0x200000000320 = 0;
  *(uint64_t*)0x200000000328 = 0;
  *(uint32_t*)0x200000000330 = 0;
  *(uint32_t*)0x200000000338 = 0;
  syscall(__NR_sendmmsg, /*fd=*/(intptr_t)-1, /*mmsg=*/0x200000000300ul,
          /*vlen=*/1ul, /*f=MSG_FASTOPEN|MSG_CONFIRM*/ 0x20000800ul);
  //  syz_open_procfs arguments: [
  //    pid: pid (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {6d 61 70 73 00} (length 0x5)
  //    }
  //  ]
  //  returns fd
  memcpy((void*)0x2000000001c0, "maps\000", 5);
  res = -1;
  res = syz_open_procfs(/*pid=*/0, /*file=*/0x2000000001c0);
  if (res != -1)
    r[0] = res;
  //  ioctl$KVM_SET_USER_MEMORY_REGION arguments: [
  //    fd: fd_kvmvm (resource)
  //    cmd: const = 0xc0686611 (4 bytes)
  //    arg: ptr[in, kvm_userspace_memory_region] {
  //      kvm_userspace_memory_region {
  //        slot: kvm_mem_slots = 0x68 (4 bytes)
  //        flags: kvm_mem_region_flags = 0x0 (4 bytes)
  //        paddr: kvm_guest_addrs = 0x17 (8 bytes)
  //        size: len = 0x2000 (8 bytes)
  //        addr: VMA[0x2000]
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000180 = 0x68;
  *(uint32_t*)0x200000000184 = 0;
  *(uint64_t*)0x200000000188 = 0x17;
  *(uint64_t*)0x200000000190 = 0x2000;
  *(uint64_t*)0x200000000198 = 0x200000ffd000;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xc0686611,
          /*arg=*/0x200000000180ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*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=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}