// https://syzkaller.appspot.com/bug?id=9d5401918f3bee146505d56912b0c57dbc0743d9
// 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>

#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 = 0xd (4 bytes)
  //        ninsn: bytesize8 = 0x4 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {b4 00 17 93 a3 77 ea 24 7f 01 01 00 00 38 60
  //              5a 99 2b e7 bf 5d f0 00 00 00 0a 00 00 61 11 90 00 00 00 00 00
  //              c6 00 00 a6 8b 87 c6 bd 5a b0 7a 6a 89 37 4d 3d cb 0a df e4 48
  //              1d 3c ac 97 81 7e 74 9b c4 e7 d2 b2 49 18 e7 c8 a1 db 9f 3d d1
  //              c6 2b 5d 15 64 8d ca 70 79 b3 ff c2 42 f5 34 d7 4a 27 48 89 70
  //              2e f7 9c 72 35 b1 41 73 1b d8 fd 1a 59 5b e9 98 c8 fa 79 80 f0
  //              ce 3c e3 a7 26 b8 56 24 d2 51 11 bc 24 7b fc 07 c5 81 ca 55 35
  //              1d 91 9a ea 88 b2 ba 79 a4 92 54 7a 51 24 dd 94 3e 39 1b bd 51
  //              27 8d 2d f2 d0 a8 da 17 7a 4f 43 52 ba 35 08 84 8c a6 42 d3 f1
  //              52 7c 03 ca 04 b3 30 c1 42 c2 75 5d c5 de f9 91 70 d1 e9 77 de
  //              cc 67 c5 ef ba 38 4b 94} (length 0xd4)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {47 50 4c 00} (length 0x4)
  //        }
  //        loglev: int32 = 0x5 (4 bytes)
  //        logsize: len = 0xfd90 (4 bytes)
  //        log: ptr[out, buffer] {
  //          buffer: (DirOut)
  //        }
  //        kern_version: bpf_kern_version = 0x1e00 (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 {
  //          sock_ops: sock_ops_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 = 0x54 (8 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x20000000e000 = 0xd;
  *(uint32_t*)0x20000000e004 = 4;
  *(uint64_t*)0x20000000e008 = 0x200000000980;
  memcpy(
      (void*)0x200000000980,
      "\xb4\x00\x17\x93\xa3\x77\xea\x24\x7f\x01\x01\x00\x00\x38\x60\x5a\x99\x2b"
      "\xe7\xbf\x5d\xf0\x00\x00\x00\x0a\x00\x00\x61\x11\x90\x00\x00\x00\x00\x00"
      "\xc6\x00\x00\xa6\x8b\x87\xc6\xbd\x5a\xb0\x7a\x6a\x89\x37\x4d\x3d\xcb\x0a"
      "\xdf\xe4\x48\x1d\x3c\xac\x97\x81\x7e\x74\x9b\xc4\xe7\xd2\xb2\x49\x18\xe7"
      "\xc8\xa1\xdb\x9f\x3d\xd1\xc6\x2b\x5d\x15\x64\x8d\xca\x70\x79\xb3\xff\xc2"
      "\x42\xf5\x34\xd7\x4a\x27\x48\x89\x70\x2e\xf7\x9c\x72\x35\xb1\x41\x73\x1b"
      "\xd8\xfd\x1a\x59\x5b\xe9\x98\xc8\xfa\x79\x80\xf0\xce\x3c\xe3\xa7\x26\xb8"
      "\x56\x24\xd2\x51\x11\xbc\x24\x7b\xfc\x07\xc5\x81\xca\x55\x35\x1d\x91\x9a"
      "\xea\x88\xb2\xba\x79\xa4\x92\x54\x7a\x51\x24\xdd\x94\x3e\x39\x1b\xbd\x51"
      "\x27\x8d\x2d\xf2\xd0\xa8\xda\x17\x7a\x4f\x43\x52\xba\x35\x08\x84\x8c\xa6"
      "\x42\xd3\xf1\x52\x7c\x03\xca\x04\xb3\x30\xc1\x42\xc2\x75\x5d\xc5\xde\xf9"
      "\x91\x70\xd1\xe9\x77\xde\xcc\x67\xc5\xef\xba\x38\x4b\x94",
      212);
  *(uint64_t*)0x20000000e010 = 0x200000003ff6;
  memcpy((void*)0x200000003ff6, "GPL\000", 4);
  *(uint32_t*)0x20000000e018 = 5;
  *(uint32_t*)0x20000000e01c = 0xfd90;
  *(uint64_t*)0x20000000e020 = 0x20000000cf3d;
  *(uint32_t*)0x20000000e028 = 0x1e00;
  *(uint32_t*)0x20000000e02c = 0;
  memset((void*)0x20000000e030, 0, 16);
  *(uint32_t*)0x20000000e040 = 0;
  *(uint32_t*)0x20000000e044 = 0;
  *(uint32_t*)0x20000000e048 = -1;
  *(uint32_t*)0x20000000e04c = 8;
  *(uint64_t*)0x20000000e050 = 0;
  *(uint32_t*)0x20000000e058 = 0;
  *(uint32_t*)0x20000000e05c = 0x10;
  *(uint64_t*)0x20000000e060 = 0;
  *(uint32_t*)0x20000000e068 = 0;
  *(uint32_t*)0x20000000e06c = 0;
  *(uint32_t*)0x20000000e070 = -1;
  *(uint32_t*)0x20000000e074 = 0;
  *(uint64_t*)0x20000000e078 = 0;
  *(uint64_t*)0x20000000e080 = 0;
  *(uint32_t*)0x20000000e088 = 0x10;
  *(uint32_t*)0x20000000e08c = 0;
  *(uint32_t*)0x20000000e090 = 0;
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000000e000ul, /*size=*/0x54ul);
}
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;
}