// https://syzkaller.appspot.com/bug?id=2482dbdc75808e95f27907b6a48676dab2f56417
// 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;
    }
  }
}

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$auto_kernfs_file_fops_kernfs_internal arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 73 79 73 2f 6d 6f 64 75 6c 65 2f 73 67 2f 70 61 72 61 6d
  //      65 74 65 72 73 2f 73 63 61 74 74 65 72 5f 65 6c 65 6d 5f 73 7a 00}
  //      (length 0x2a)
  //    }
  //    flags: open_flags = 0x22001 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_kernfs_file_fops_kernfs_internal
  memcpy((void*)0x200000000000, "/sys/module/sg/parameters/scatter_elem_sz\000",
         42);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000000ul,
                /*flags=O_NOFOLLOW|FASYNC|O_WRONLY*/ 0x22001, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write$auto arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {30 00 a6 cc 0d 91 51 55 9d 49 da 1b ad b1 9e c8 54 74 a8 94
  //      9c 8a e2 c7 63 4f 4d b6 a3 2c 21 6f 9e b0 ad 54 fb 52 a1 59 94 56 5b
  //      38 04 63 df 3a 5d d9 94 26 81 e2 13 8f ea 23 f8 46 bb 4f 4f 5d 65 5b
  //      ab 78 6f d9 90 bb f9 cd c0 c9 00 da ac dd 1a dd dd b9 6f 1a ab d5 08
  //      c1 04 7a d0 49 3e 8f 00 e5 1c 2a ed 60 fd 15 88 0f 9a d5 a7 14 0c 7d
  //      3b ab 74 d1 61 6b e5 98 ea e3 7d 10 ab 0c 5f 19 9b 11 b2 35 56 55 4b
  //      93 cd 64 17 e4 cb 41 a5 5b 08 b8 3b 02 74 63 66 06 fb 44 91 ca 47 da
  //      61 3a 6b 5b 72 06 eb f0 c4 cb 10 ae a5 e9 75 9f de 4b a5 8e d6 8f d0
  //      55 56 11 cb dd 81 be de 4c 2f 06 28 1d a5 59 07 c1 e9 28 85 52 96 e4
  //      86 5c 13 a9 1a 26 19 8a 39 82 f0 83 0c f7 eb 00 00 00 00 00 00 00 00
  //      76 92 3c 65 8b 3f 23 61 a3 20 aa 19 de 7d 10 a4 95 02 12 bb 13 eb 3c
  //      c8 78 86 c6 12 77 32 75 e5 b0 8f da 88 52 f4 20 40 dc 8e aa f0 7b a8
  //      2c a3 c7 01 5c 03 28 c0 b3 f3 f8 30 65 71 6f 1a e0 c6 d9 cf ab f4 5f
  //      f2 ed 59 ff e0 be 82 63 58 5f 26 6f c4 53 87 9a 27 77 18 91 5d cf 17
  //      39 3f 41 67 25 0b 12 86 f0 e2 64 dc aa 0f a8 76 c3 83 89 be 1c 5e 0d
  //      fb db 14 8c 43 e9 3e fc f3 1a 2f 99 64 63 41 f4 42 f3 ba 17 ea}
  //      (length 0x16b)
  //    }
  //    count: intptr = 0xe (8 bytes)
  //  ]
  memcpy((void*)0x200000000200,
         "0\000\246\314\r\221QU\235I\332\033\255\261\236\310Tt\250\224\234\212"
         "\342\307cOM\266\243,!o\236\260\255T\373R\241Y\224V[8\004c\337:]"
         "\331\224&\201\342\023\217\352#\370F\273OO]e["
         "\253xo\331\220\273\371\315\300\311\000\332\254\335\032\335\335\271o"
         "\032\253\325\b\301\004z\320I>\217\000\345\034*\355`"
         "\375\025\210\017\232\325\247\024\f};\253t\321ak\345\230\352\343}"
         "\020\253\f_\031\233\021\2625VUK\223\315d\027\344\313A\245[\b\270;"
         "\002tcf\006\373D\221\312G\332a:k["
         "r\006\353\360\304\313\020\256\245\351u\237\336K\245\216\326\217\320UV"
         "\021\313\335\201\276\336L/"
         "\006(\035\245Y\a\301\351(\205R\226\344\206\\\023\251\032&"
         "\031\2129\202\360\203\f\367\353\000\000\000\000\000\000\000\000v\222<"
         "e\213?#a\243 "
         "\252\031\336}\020\244\225\002\022\273\023\353<"
         "\310x\206\306\022w2u\345\260\217\332\210R\364 "
         "@\334\216\252\360{\250,\243\307\001\\\003("
         "\300\263\363\3700eqo\032\340\306\331\317\253\364_"
         "\362\355Y\377\340\276\202cX_&o\304S\207\232\'w\030\221]\317\0279?Ag%"
         "\v\022\206\360\342d\334\252\017\250v\303\203\211\276\034^"
         "\r\373\333\024\214C\351>\374\363\032/\231dcA\364B\363\272\027\352",
         363);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000200ul, /*count=*/0xeul);
  //  openat$auto_sg_fops_sg arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 73 67 30 00} (length 0x9)
  //    }
  //    flags: open_flags = 0xc0482 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_sg_fops_sg
  memcpy((void*)0x200000000000, "/dev/sg0\000", 9);
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000000ul,
          /*flags=O_NOATIME|O_EXCL|O_CLOEXEC|O_APPEND|0x2*/ 0xc0482,
          /*mode=*/0);
}
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;
}