// https://syzkaller.appspot.com/bug?id=be49c2247d07ad4a4faa018ebea0432f6f0c1a82
// 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 386
#endif
#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

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 < 15000)
        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 (4 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 = 0x6 (4 bytes)
  //        ninsn: bytesize8 = 0x5 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 02 00 00 00 80 00 00 00 00 00 00 00 00 00
  //              00 85 00 00 00 36 00 00 00 85 00 00 00 2a 00 00 00 95 00 00 00
  //              00 00 00 00 91 0f 00 10 83 f7 b8 03 31 57 ad 3a 9e c3 e0 a1 54
  //              dd e8 e5 16 b3 3d 49 cd 6d 8e a1 ef 44 e2 6a 96 89 04 7d c8 10
  //              52 3b b6 cb 64 6e da c6 90 57 13 1e 1b e7 16 2e ed 1f 07 ba 5e
  //              28 f6 fe 1c b9 39 67 ef 2f 0e f2 d0 df 01 ab 65 f8 f7 30 d2 85
  //              12 51 b7 cd a3 3d 6e 31 16 f5 66 92 77 44 a6 e2 35 59 db 48 c0
  //              3d 56 7c 61 c6 8d 40 95 f6 39 c7 dd aa 0d 10 b9 b3 f0 d1 f2 0b
  //              d1 b7 20 12 aa aa 70 b8 45 45 5e c5 2e 27 fd b0} (length 0xb2)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {73 79 7a 6b 61 6c 6c 65 72 00} (length 0xa)
  //        }
  //        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 {
  //          xdp: xdp_attach_types = 0x0 (4 bytes)
  //        }
  //        btf_fd: fd_btf (resource)
  //        func_info_rec_size: const = 0x0 (4 bytes)
  //        func_info: nil
  //        func_info_cnt: len = 0x0 (4 bytes)
  //        line_info_rec_size: const = 0x0 (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 = 0x49 (4 bytes)
  //  ]
  //  returns fd_bpf_prog
  *(uint32_t*)0x20000100 = 6;
  *(uint32_t*)0x20000104 = 5;
  *(uint64_t*)0x20000108 = 0x200001c0;
  memcpy(
      (void*)0x200001c0,
      "\x18\x02\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x85\x00"
      "\x00\x00\x36\x00\x00\x00\x85\x00\x00\x00\x2a\x00\x00\x00\x95\x00\x00\x00"
      "\x00\x00\x00\x00\x91\x0f\x00\x10\x83\xf7\xb8\x03\x31\x57\xad\x3a\x9e\xc3"
      "\xe0\xa1\x54\xdd\xe8\xe5\x16\xb3\x3d\x49\xcd\x6d\x8e\xa1\xef\x44\xe2\x6a"
      "\x96\x89\x04\x7d\xc8\x10\x52\x3b\xb6\xcb\x64\x6e\xda\xc6\x90\x57\x13\x1e"
      "\x1b\xe7\x16\x2e\xed\x1f\x07\xba\x5e\x28\xf6\xfe\x1c\xb9\x39\x67\xef\x2f"
      "\x0e\xf2\xd0\xdf\x01\xab\x65\xf8\xf7\x30\xd2\x85\x12\x51\xb7\xcd\xa3\x3d"
      "\x6e\x31\x16\xf5\x66\x92\x77\x44\xa6\xe2\x35\x59\xdb\x48\xc0\x3d\x56\x7c"
      "\x61\xc6\x8d\x40\x95\xf6\x39\xc7\xdd\xaa\x0d\x10\xb9\xb3\xf0\xd1\xf2\x0b"
      "\xd1\xb7\x20\x12\xaa\xaa\x70\xb8\x45\x45\x5e\xc5\x2e\x27\xfd\xb0",
      178);
  *(uint64_t*)0x20000110 = 0x200000c0;
  memcpy((void*)0x200000c0, "syzkaller\000", 10);
  *(uint32_t*)0x20000118 = 0;
  *(uint32_t*)0x2000011c = 0;
  *(uint64_t*)0x20000120 = 0;
  *(uint32_t*)0x20000128 = 0;
  *(uint32_t*)0x2000012c = 0;
  memset((void*)0x20000130, 0, 16);
  *(uint32_t*)0x20000140 = 0;
  *(uint32_t*)0x20000144 = 0;
  *(uint32_t*)0x20000148 = -1;
  *(uint32_t*)0x2000014c = 0;
  *(uint64_t*)0x20000150 = 0;
  *(uint32_t*)0x20000158 = 0;
  *(uint32_t*)0x2000015c = 0;
  *(uint64_t*)0x20000160 = 0;
  *(uint32_t*)0x20000168 = 0;
  *(uint32_t*)0x2000016c = 0;
  *(uint32_t*)0x20000170 = 0;
  *(uint32_t*)0x20000174 = 0;
  *(uint64_t*)0x20000178 = 0;
  *(uint64_t*)0x20000180 = 0;
  *(uint32_t*)0x20000188 = 0x10;
  *(uint32_t*)0x2000018c = 0;
  *(uint32_t*)0x20000190 = 0;
  syscall(__NR_bpf, /*cmd=*/5, /*arg=*/0x20000100, /*size=*/0x49);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x20000000, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x21000000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}