// https://syzkaller.appspot.com/bug?id=6f35b4962ae3653e4190d0ff3e30b882ebe86755
// 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>

#ifndef __NR_bpf
#define __NR_bpf 321
#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;
    }
  }
}

void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  bpf$PROG_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
  //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
  //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
  //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
  //        type: bpf_prog_type = 0x2 (4 bytes)
  //        ninsn: bytesize8 = 0x16 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {61 12 30 00 00 00 00 00 61 13 4c 00 00 00 00
  //              00 bf 20 00 00 00 00 00 00 16 00 10 00 07 1b 48 01 3d 03 01 00
  //              00 00 00 00 0f 02 00 00 00 00 00 00 bc 26 10 00 00 00 00 00 bf
  //              67 20 00 00 00 00 00 16 02 00 00 0f ff 07 00 67 02 00 00 07 00
  //              00 00 36 06 00 00 0e e6 00 f0 bf 05 00 00 00 00 00 00 0f 65 00
  //              00 00 00 00 00 65 07 f4 ff 02 00 00 00 07 07 00 00 4c 00 40 00
  //              1f 75 00 00 00 00 00 00 bf 54 00 00 00 00 00 00 07 05 00 00 03
  //              00 f9 ff ad 43 01 00 00 00 00 00 95 00 00 00 00 00 00 00 05 00
  //              00 00 00 00 00 00 95 00 00 00 00 00 00 00 4d 9b d5 91 d5 68 25
  //              3e 99 88 43 1e c0 68 e3 a8 36 83 d5 87 19 d7 21 83 f2 cb 7f 43
  //              dd 55 78 8b e8 20 b2 36 dc b6 95 db fd 73 7c bf 5f e7 03 05
  //              86} (length 0xe1)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {47 50 4c 00} (length 0x4)
  //        }
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x0 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        union bpf_prog_attach_types {
  //          fallback: bpf_attach_types = 0x0 (4 bytes)
  //        }
  //        btf_fd: fd_btf (resource)
  //        func_info_rec_size: const = 0x8 (4 bytes)
  //        func_info: nil
  //        func_info_cnt: len = 0x0 (4 bytes)
  //        line_info_rec_size: const = 0x10 (4 bytes)
  //        line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: bpf_btf_id (resource)
  //        attach_prog_fd: fd_bpf_prog (resource)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x10 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
  //        bpf_prog_attach_types, bpf_btf_id[opt],
  //        fd_bpf_prog[opt]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x48 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x2000000054c0 = 2;
  *(uint32_t*)0x2000000054c4 = 0x16;
  *(uint64_t*)0x2000000054c8 = 0x200000000180;
  memcpy(
      (void*)0x200000000180,
      "\x61\x12\x30\x00\x00\x00\x00\x00\x61\x13\x4c\x00\x00\x00\x00\x00\xbf\x20"
      "\x00\x00\x00\x00\x00\x00\x16\x00\x10\x00\x07\x1b\x48\x01\x3d\x03\x01\x00"
      "\x00\x00\x00\x00\x0f\x02\x00\x00\x00\x00\x00\x00\xbc\x26\x10\x00\x00\x00"
      "\x00\x00\xbf\x67\x20\x00\x00\x00\x00\x00\x16\x02\x00\x00\x0f\xff\x07\x00"
      "\x67\x02\x00\x00\x07\x00\x00\x00\x36\x06\x00\x00\x0e\xe6\x00\xf0\xbf\x05"
      "\x00\x00\x00\x00\x00\x00\x0f\x65\x00\x00\x00\x00\x00\x00\x65\x07\xf4\xff"
      "\x02\x00\x00\x00\x07\x07\x00\x00\x4c\x00\x40\x00\x1f\x75\x00\x00\x00\x00"
      "\x00\x00\xbf\x54\x00\x00\x00\x00\x00\x00\x07\x05\x00\x00\x03\x00\xf9\xff"
      "\xad\x43\x01\x00\x00\x00\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\x05\x00"
      "\x00\x00\x00\x00\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\x4d\x9b\xd5\x91"
      "\xd5\x68\x25\x3e\x99\x88\x43\x1e\xc0\x68\xe3\xa8\x36\x83\xd5\x87\x19\xd7"
      "\x21\x83\xf2\xcb\x7f\x43\xdd\x55\x78\x8b\xe8\x20\xb2\x36\xdc\xb6\x95\xdb"
      "\xfd\x73\x7c\xbf\x5f\xe7\x03\x05\x86",
      225);
  *(uint64_t*)0x2000000054d0 = 0x200000000100;
  memcpy((void*)0x200000000100, "GPL\000", 4);
  *(uint32_t*)0x2000000054d8 = 0;
  *(uint32_t*)0x2000000054dc = 0;
  *(uint64_t*)0x2000000054e0 = 0;
  *(uint32_t*)0x2000000054e8 = 0;
  *(uint32_t*)0x2000000054ec = 0;
  memset((void*)0x2000000054f0, 0, 16);
  *(uint32_t*)0x200000005500 = 0;
  *(uint32_t*)0x200000005504 = 0;
  *(uint32_t*)0x200000005508 = -1;
  *(uint32_t*)0x20000000550c = 8;
  *(uint64_t*)0x200000005510 = 0;
  *(uint32_t*)0x200000005518 = 0;
  *(uint32_t*)0x20000000551c = 0x10;
  *(uint64_t*)0x200000005520 = 0;
  *(uint32_t*)0x200000005528 = 0;
  *(uint32_t*)0x20000000552c = 0;
  *(uint32_t*)0x200000005530 = -1;
  *(uint32_t*)0x200000005534 = 0;
  *(uint64_t*)0x200000005538 = 0;
  *(uint64_t*)0x200000005540 = 0;
  *(uint32_t*)0x200000005548 = 0x10;
  *(uint32_t*)0x20000000554c = 0;
  *(uint32_t*)0x200000005550 = 0;
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x2000000054c0ul, /*size=*/0x48ul);
}
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;
}