// 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>

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)) {
  }
  //  openat$smackfs_ambient arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 73 79 73 2f 66 73 2f 73 6d 61 63 6b 66 73 2f 61 6d 62 69
  //      65 6e 74 00} (length 0x18)
  //    }
  //    flags: const = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_smackfs_label
  memcpy((void*)0x200000000240, "/sys/fs/smackfs/ambient\000", 24);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000240ul, /*flags=*/2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write$smackfs_label arguments: [
  //    fd: fd_smackfs_label (resource)
  //    buf: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {62 61 74 64 85 30 09 2b b1 fb bf 47 99 90 12 f1
  //          e0 fe 24 41 c9 2b 4b 65 64 76 00 56 d7 a6 41 bb dd 8a 62 f9 06 00
  //          1d 39 79 46 5d dd 6c 8f fd f9 d0 50 95 f6 b0 db 7d cc 6a f8 44 79
  //          92 a1 dd fa c1 a4 10 ea 91 a7 13 26 bd e7 ab 64 67 83 3d 09 00 00
  //          00 00 00 00 00 ae 65 96 3a 6c 3a 72 5d 37 c1 bb 39 01 00 00 04 00
  //          00 00 00 b9 71 d9 f7 5f 7d fb 06 c6 8f 1c 7f fd 15 4e 8c bf 52 7c
  //          e5 08 04 9e ab 94 ed 0b 6f 60 b1 98 eb 61 d7 0c 8a e2 21 62 c9 b0
  //          e5 bf 29 2e f5 13 1c ee e6 e1 70 72 05 e2 18 51 d3 20 75 d6 8a 0e
  //          a2 c2 45 f0 00 25 e0 33 f0 b8 31 94 87 9c 8f 96 76 7b a5 87 a5 53
  //          a8 f7 4b c9 ef 43 3d 9f b7 8d c1 ba 72 ef 24 3f 0a 4a 1e 8f 60 81
  //          d5 47 91 8f 62 06 28 d4 a5 b9 84 7a 64 dd d6 ca 35 ff 05 88 c8 3e
  //          6c 37 e3 8a 40 86 10 fc b6 72 48 a5 d8 09 af 57 1a 51 7c 71 52 a8
  //          c1 4d db 3a e4 c7 52 39 c9 d9 f9 de fe 3a e4 11 f3 9a 65 91 2d 3a
  //          5d 90 49 a7 d8 8f 12 ed e1 cd b4 7a 09 34 a2 b6 b3 13 32 33 49 74
  //          c6 7d 40 07 e6 a0 ee b2 3d e5 51 d5 15 fb 88 5e 3b f1 f7 7b 8b 92
  //          d0 42 07 3b 99 c7 c6 17 94 69 f9 f2 8e 08 89 ad 26 4a 52 5b 42 03
  //          5b 17} (length 0x15c)
  //        }
  //      }
  //    }
  //    count: len = 0x2 (8 bytes)
  //  ]
  memcpy(
      (void*)0x2000000005c0,
      "\x62\x61\x74\x64\x85\x30\x09\x2b\xb1\xfb\xbf\x47\x99\x90\x12\xf1\xe0\xfe"
      "\x24\x41\xc9\x2b\x4b\x65\x64\x76\x00\x56\xd7\xa6\x41\xbb\xdd\x8a\x62\xf9"
      "\x06\x00\x1d\x39\x79\x46\x5d\xdd\x6c\x8f\xfd\xf9\xd0\x50\x95\xf6\xb0\xdb"
      "\x7d\xcc\x6a\xf8\x44\x79\x92\xa1\xdd\xfa\xc1\xa4\x10\xea\x91\xa7\x13\x26"
      "\xbd\xe7\xab\x64\x67\x83\x3d\x09\x00\x00\x00\x00\x00\x00\x00\xae\x65\x96"
      "\x3a\x6c\x3a\x72\x5d\x37\xc1\xbb\x39\x01\x00\x00\x04\x00\x00\x00\x00\xb9"
      "\x71\xd9\xf7\x5f\x7d\xfb\x06\xc6\x8f\x1c\x7f\xfd\x15\x4e\x8c\xbf\x52\x7c"
      "\xe5\x08\x04\x9e\xab\x94\xed\x0b\x6f\x60\xb1\x98\xeb\x61\xd7\x0c\x8a\xe2"
      "\x21\x62\xc9\xb0\xe5\xbf\x29\x2e\xf5\x13\x1c\xee\xe6\xe1\x70\x72\x05\xe2"
      "\x18\x51\xd3\x20\x75\xd6\x8a\x0e\xa2\xc2\x45\xf0\x00\x25\xe0\x33\xf0\xb8"
      "\x31\x94\x87\x9c\x8f\x96\x76\x7b\xa5\x87\xa5\x53\xa8\xf7\x4b\xc9\xef\x43"
      "\x3d\x9f\xb7\x8d\xc1\xba\x72\xef\x24\x3f\x0a\x4a\x1e\x8f\x60\x81\xd5\x47"
      "\x91\x8f\x62\x06\x28\xd4\xa5\xb9\x84\x7a\x64\xdd\xd6\xca\x35\xff\x05\x88"
      "\xc8\x3e\x6c\x37\xe3\x8a\x40\x86\x10\xfc\xb6\x72\x48\xa5\xd8\x09\xaf\x57"
      "\x1a\x51\x7c\x71\x52\xa8\xc1\x4d\xdb\x3a\xe4\xc7\x52\x39\xc9\xd9\xf9\xde"
      "\xfe\x3a\xe4\x11\xf3\x9a\x65\x91\x2d\x3a\x5d\x90\x49\xa7\xd8\x8f\x12\xed"
      "\xe1\xcd\xb4\x7a\x09\x34\xa2\xb6\xb3\x13\x32\x33\x49\x74\xc6\x7d\x40\x07"
      "\xe6\xa0\xee\xb2\x3d\xe5\x51\xd5\x15\xfb\x88\x5e\x3b\xf1\xf7\x7b\x8b\x92"
      "\xd0\x42\x07\x3b\x99\xc7\xc6\x17\x94\x69\xf9\xf2\x8e\x08\x89\xad\x26\x4a"
      "\x52\x5b\x42\x03\x5b\x17",
      348);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x2000000005c0ul, /*count=*/2ul);
}
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;
}