// https://syzkaller.appspot.com/bug?id=0b210638616bb68109e9642158d4c0072770ae1c
// 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_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_sendmsg
#define __NR_sendmsg 211
#endif
#ifndef __NR_setns
#define __NR_setns 268
#endif
#ifndef __NR_socket
#define __NR_socket 198
#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)) {
  }
  //  setns arguments: [
  //    fd: fd_namespace (resource)
  //    type: ns_type = 0x0 (8 bytes)
  //  ]
  syscall(__NR_setns, /*fd=*/0xc9, /*type=*/0ul);
  //  socket$nl_netfilter arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0xc (4 bytes)
  //  ]
  //  returns sock_nl_netfilter
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0xc);
  if (res != -1)
    r[0] = res;
  //  mmap arguments: [
  //    addr: VMA[0x200000]
  //    len: len = 0x200000 (4 bytes)
  //    prot: mmap_prot = 0x300000b (8 bytes)
  //    flags: mmap_flags = 0x204031 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0xec776000 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x200000,
          /*prot=PROT_GROWSUP|PROT_GROWSDOWN|PROT_SEM|PROT_WRITE|PROT_READ*/
          0x300000bul,
          /*flags=MAP_NORESERVE|MAP_FIXED|MAP_ANONYMOUS|0x200001*/ 0x204031ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0xec776000ul);
  //  sendmsg$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: ptr[in, iovec[in, nft_batch_msg]] {
  //          iovec[in, nft_batch_msg] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {14 00 00 00 10 00 01 00 00 00 00 00 00
  //                  00 00 00 01 00 00 0a 20 00 00 00 00 0a 01 04 00 00 00 00
  //                  00 00 00 00 01 00 00 00 09 00 01 00 73 79 7a 30 00 00 00
  //                  00 48 00 00 00 03 0a 01 04 00 00 00 00 00 00 00 00 01 00
  //                  00 00 09 00 01 00 73 79 7a 30 00 00 00 00 09 00 03 00 73
  //                  79 7a 31 00 00 00 00 14 00 04 80 08 00 01 40 00 00 00 04
  //                  08 00 02 40 00 00 00 64 08 00 07 00 6e 61 74 00 4c 00 00
  //                  00 06 0a 01 04 00 00 00 00 00 00 00 00 01 00 00 00 09 00
  //                  01 00 73 79 7a 30 00 00 00 00 09 00 02 00 73 79 7a 31 00
  //                  00 00 00 20 00 04 80 1c 00 01 80 09 00 01 00 6d 61 73 71
  //                  00 00 00 00 0c 00 02 80 08 00 01 40 00 00 00 63 14 00 00
  //                  00 11 00 01} (length 0xcf)
  //                }
  //              }
  //            }
  //            len: len = 0xdc (8 bytes)
  //          }
  //        }
  //        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*)0x20000240 = 0;
  *(uint32_t*)0x20000248 = 0;
  *(uint64_t*)0x20000250 = 0x20000280;
  *(uint64_t*)0x20000280 = 0x200008c0;
  memcpy(
      (void*)0x200008c0,
      "\x14\x00\x00\x00\x10\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00"
      "\x00\x0a\x20\x00\x00\x00\x00\x0a\x01\x04\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x01\x00\x00\x00\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x48\x00"
      "\x00\x00\x03\x0a\x01\x04\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00"
      "\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x09\x00\x03\x00\x73\x79"
      "\x7a\x31\x00\x00\x00\x00\x14\x00\x04\x80\x08\x00\x01\x40\x00\x00\x00\x04"
      "\x08\x00\x02\x40\x00\x00\x00\x64\x08\x00\x07\x00\x6e\x61\x74\x00\x4c\x00"
      "\x00\x00\x06\x0a\x01\x04\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00"
      "\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x09\x00\x02\x00\x73\x79"
      "\x7a\x31\x00\x00\x00\x00\x20\x00\x04\x80\x1c\x00\x01\x80\x09\x00\x01\x00"
      "\x6d\x61\x73\x71\x00\x00\x00\x00\x0c\x00\x02\x80\x08\x00\x01\x40\x00\x00"
      "\x00\x63\x14\x00\x00\x00\x11\x00\x01",
      207);
  *(uint64_t*)0x20000288 = 0xdc;
  *(uint64_t*)0x20000258 = 1;
  *(uint64_t*)0x20000260 = 0;
  *(uint64_t*)0x20000268 = 0;
  *(uint32_t*)0x20000270 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x20000240ul, /*f=*/0ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*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;
}