// https://syzkaller.appspot.com/bug?id=0a885a86c3f396f8fb35dadea0d48618bf9eb4c4
// 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 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)) {
  }
  //  mq_open arguments: [
  //    name: ptr[in, buffer] {
  //      buffer: {65 74 68 30 00} (length 0x5)
  //    }
  //    flags: mq_open_flags = 0x42 (8 bytes)
  //    mode: open_mode = 0x0 (8 bytes)
  //    attr: nil
  //  ]
  //  returns fd_mq
  memcpy((void*)0x200000000000, "eth0\000", 5);
  syscall(__NR_mq_open, /*name=*/0x200000000000ul,
          /*flags=O_CREAT|O_RDWR*/ 0x42ul, /*mode=*/0ul, /*attr=*/0ul);
  //  mq_open arguments: [
  //    name: ptr[in, buffer] {
  //      buffer: {65 74 68 30 00 23 13 ae 75 e0 fb 75 30 2a f3 11 69 dd d9 c6
  //      87 de bf 5f a0 f6 df 6b bf 2e 22 a6 c0 23 70 cd 1c 2f a6 f2 bc 79 4c
  //      85 61 b5 bb 7e 2b 3e bc 93 f8 ab 9a 33 85 6c 1d 15 11 1a 7b 40 21 32
  //      b6 21 ae f7 39 6b 90 88 0b 38 49 24 fd 51 1d 90 3d 72 d8 c0 d8 09 2f
  //      8d 76 b8 93 c3 43 ae 9d 63 d1 54 dd 14 d3 e1 be 5f 24 41 3d 7a ee bd
  //      2f 58 be 6d 4f 58 29 73 94 de be 5f 0b 01 be eb bb 91 11 7a c2 7c 64
  //      1b 04 d2 f9 79 78 b2 1b 08 4c 54 72 77 88 9e 30 09 c6 e2 9c ed 5c d8
  //      5b c8 04 20 f3 ac 5d 56 1d 3a fc c3 9e 02 07 78 ef fe 1c 2e 54 54 cf
  //      bf f5 80 61 25 dc 51 b3 43 75 54 cc 37 8a 76 73 b2 07 fe b3 6a 2a ad
  //      18 49 cc e9 aa 7b 5d ef b7 f2 ee 2a f9 35 08 4a 74 d0 73 c4 aa c8 13
  //      7e b2 f2 30 bd 66 db ae 47 e3 fb ef 94 ef 3a 51 1b e3 a3 a4 7d ef 60
  //      65 cd 4c ab db 0d f2 79 9f 67 31 f4 09 18 69 2f 21 13 f1 2c 8c 75 aa
  //      bf 7e 29 94 1b 32 93 86 e7 9a f2 6a a8 96 a6 a2 fc 4e 81 af 54 68 b3
  //      1b 6f 3a e8 0b 71 37 53 e4 48 f3 4c a0 9c 97 42 12 10 9d aa 7f 71 06
  //      b9 28 f6 1c 83 b1 4a ec 92 36 b5 61 30 a0 42 ae 7c} (length 0x150)
  //    }
  //    flags: mq_open_flags = 0x42 (8 bytes)
  //    mode: open_mode = 0x11 (8 bytes)
  //    attr: nil
  //  ]
  //  returns fd_mq
  memcpy((void*)0x200000000080,
         "eth0\000#\023\256u\340\373u0*\363\021i\335\331\306\207\336\277_"
         "\240\366\337k\277.\"\246\300#p\315\034/"
         "\246\362\274yL\205a\265\273~+>"
         "\274\223\370\253\2323\205l\035\025\021\032{@!2\266!"
         "\256\3679k\220\210\v8I$\375Q\035\220=r\330\300\330\t/"
         "\215v\270\223\303C\256\235c\321T\335\024\323\341\276_$A=z\356\275/"
         "X\276mOX)s\224\336\276_\v\001\276\353\273\221\021z\302|"
         "d\033\004\322\371yx\262\033\bLTrw\210\2360\t\306\342\234\355\\\330["
         "\310\004 "
         "\363\254]V\035:\374\303\236\002\ax\357\376\034.TT\317\277\365\200a%"
         "\334Q\263CuT\3147\212vs\262\a\376\263j*\255\030I\314\351\252{]"
         "\357\267\362\356*\3715\bJt\320s\304\252\310\023~"
         "\262\3620\275f\333\256G\343\373\357\224\357:Q\033\343\243\244}\357`"
         "e\315L\253\333\r\362y\237g1\364\t\030i/"
         "!\023\361,\214u\252\277~)"
         "\224\0332\223\206\347\232\362j\250\226\246\242\374N\201\257Th\263\033"
         "o:\350\vq7S\344H\363L\240\234\227B\022\020\235\252\177q\006\271("
         "\366\034\203\261J\354\2226\265a0\240B\256|",
         336);
  syscall(__NR_mq_open, /*name=*/0x200000000080ul,
          /*flags=O_CREAT|O_RDWR*/ 0x42ul, /*mode=S_IXOTH|S_IWGRP*/ 0x11ul,
          /*attr=*/0ul);
}
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;
}