// https://syzkaller.appspot.com/bug?id=d4463a2d3563cdc5823b22d4e115144d0af7e88c
// 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 unsigned long long procid;

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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket arguments: [
  //    domain: socket_domain = 0x8000000010 (8 bytes)
  //    type: socket_type = 0x2 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  res = syscall(__NR_socket, /*domain=AF_NETLINK|0x8000000000*/ 0x8000000010ul,
                /*type=SOCK_DGRAM*/ 2ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {fc 00 00 00 1c 00 07 04 ab 5b 25 09 b8 68 03 00 02 ab 08 7a
  //      01 00 00 00 01 48 10 93 21 00 01 c0 f0 03 05 84 05 00 60 10 00 00 00
  //      00 00 03 98 15 fa 2c 53 c2 86 48 00 00 00 b9 d9 56 62 53 7a 00 bc 00
  //      0c 00 f0 ff 7f 00 00 b4 00 60 00 33 d4 40 00 04 05 60 91 6a 00 33 f4
  //      36 31 30 12 da fd 5a 32 e2 73 fc 83 ab 82 d7 10 f7 4c ec 18 44 06 f9
  //      0d 43 5e f8 b2 9d 3e f3 d9 2c 94 17 0e 5b ba 2e 17 73 12 e0 81 be a0
  //      5d 3a 02 1e 8c a0 62 91 4a 46 cc fc 51 0b b7 3c 94 55 cd c8 36 3a e4
  //      f5 df 77 bc 4c fd 62 39 ec 2a 0f 0d 1b ca e5 fa 0f 5f 9d cd d5 1a f5
  //      1a f8 50 29 43 28 3f 4b b1 02 b2 b8 f5 56 67 91 cf 19 02 01 de d8 15
  //      b2 cc d2 43 f3 95 ed 94 e0 ad 91 bd 64 33 80 2e 07 84 f2 01 3c d1 89
  //      00 58 a1 00 00 c8 80 ac 80 1f e4 af 00 00 49 f0 d4 79 6f 00 00 09 05
  //      48 de} (length 0xfc)
  //    }
  //    count: len = 0xfc (8 bytes)
  //  ]
  memcpy((void*)0x2000000002c0,
         "\xfc\x00\x00\x00\x1c\x00\x07\x04\xab\x5b\x25\x09\xb8\x68\x03\x00\x02"
         "\xab\x08\x7a\x01\x00\x00\x00\x01\x48\x10\x93\x21\x00\x01\xc0\xf0\x03"
         "\x05\x84\x05\x00\x60\x10\x00\x00\x00\x00\x00\x03\x98\x15\xfa\x2c\x53"
         "\xc2\x86\x48\x00\x00\x00\xb9\xd9\x56\x62\x53\x7a\x00\xbc\x00\x0c\x00"
         "\xf0\xff\x7f\x00\x00\xb4\x00\x60\x00\x33\xd4\x40\x00\x04\x05\x60\x91"
         "\x6a\x00\x33\xf4\x36\x31\x30\x12\xda\xfd\x5a\x32\xe2\x73\xfc\x83\xab"
         "\x82\xd7\x10\xf7\x4c\xec\x18\x44\x06\xf9\x0d\x43\x5e\xf8\xb2\x9d\x3e"
         "\xf3\xd9\x2c\x94\x17\x0e\x5b\xba\x2e\x17\x73\x12\xe0\x81\xbe\xa0\x5d"
         "\x3a\x02\x1e\x8c\xa0\x62\x91\x4a\x46\xcc\xfc\x51\x0b\xb7\x3c\x94\x55"
         "\xcd\xc8\x36\x3a\xe4\xf5\xdf\x77\xbc\x4c\xfd\x62\x39\xec\x2a\x0f\x0d"
         "\x1b\xca\xe5\xfa\x0f\x5f\x9d\xcd\xd5\x1a\xf5\x1a\xf8\x50\x29\x43\x28"
         "\x3f\x4b\xb1\x02\xb2\xb8\xf5\x56\x67\x91\xcf\x19\x02\x01\xde\xd8\x15"
         "\xb2\xcc\xd2\x43\xf3\x95\xed\x94\xe0\xad\x91\xbd\x64\x33\x80\x2e\x07"
         "\x84\xf2\x01\x3c\xd1\x89\x00\x58\xa1\x00\x00\xc8\x80\xac\x80\x1f\xe4"
         "\xaf\x00\x00\x49\xf0\xd4\x79\x6f\x00\x00\x09\x05\x48\xde",
         252);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x2000000002c0ul, /*count=*/0xfcul);
  //  socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (4 bytes)
  //  ]
  //  returns sock_nl_generic
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
  if (res != -1)
    r[1] = res;
  //  socket arguments: [
  //    domain: socket_domain = 0x1d (8 bytes)
  //    type: socket_type = 0x2 (8 bytes)
  //    proto: int32 = 0x6 (4 bytes)
  //  ]
  //  returns sock
  syscall(__NR_socket, /*domain=AF_CAN*/ 0x1dul, /*type=SOCK_DGRAM*/ 2ul,
          /*proto=*/6);
  //  sendmsg$nl_generic arguments: [
  //    fd: sock_nl_generic (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[netlink_random_msg_type,
  //    genlmsghdr, nl_generic_attr]]] {
  //      msghdr_netlink[netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //      nl_generic_attr]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_t[netlink_random_msg_type,
  //        genlmsghdr, nl_generic_attr]]] {
  //          iovec[in, netlink_msg_t[netlink_random_msg_type, genlmsghdr,
  //          nl_generic_attr]] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {14 00 00 00 26 00 01 00 26 03 00 00 fc
  //                  db df 25 06} (length 0x11)
  //                }
  //              }
  //            }
  //            len: len = 0x14 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x4000d (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x20048000 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000000 = 0;
  *(uint32_t*)0x200000000008 = 0;
  *(uint64_t*)0x200000000010 = 0x200000001ac0;
  *(uint64_t*)0x200000001ac0 = 0x2000000041c0;
  memcpy((void*)0x2000000041c0,
         "\x14\x00\x00\x00\x26\x00\x01\x00\x26\x03\x00\x00\xfc\xdb\xdf\x25\x06",
         17);
  *(uint64_t*)0x200000001ac8 = 0x14;
  *(uint64_t*)0x200000000018 = 1;
  *(uint64_t*)0x200000000020 = 0;
  *(uint64_t*)0x200000000028 = 0;
  *(uint32_t*)0x200000000030 = 0x4000d;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000000ul,
          /*f=MSG_FASTOPEN|MSG_BATCH|MSG_MORE*/ 0x20048000ul);
}
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;
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}