// https://syzkaller.appspot.com/bug?id=40c58da127e70ef7a98a00583e4cb59cbeb7bb3e
// 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 280
#endif
#ifndef __NR_ioctl
#define __NR_ioctl 29
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#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;
}

const int kInitNetNsFd = 201;

static long syz_init_net_socket(volatile long domain, volatile long type,
                                volatile long proto)
{
  return syscall(__NR_socket, domain, type, proto);
}

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)) {
  }
  //  bpf$PROG_LOAD_XDP arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32], const[BPF_XDP,
  //    int32], const[0, int32], const[0, int32]]] {
  //      bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32], const[BPF_XDP, int32],
  //      const[0, int32], const[0, int32]] {
  //        type: const = 0x5 (4 bytes)
  //        ninsn: bytesize8 = 0x4 (4 bytes)
  //        insns: nil
  //        license: ptr[in, buffer] {
  //          buffer: {73 79 7a 6b 61 6c 6c 65 72 00} (length 0xa)
  //        }
  //        loglev: int32 = 0x5 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x7000000 (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:
  //        const = 0x25 (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: const = 0x0 (4 bytes)
  //        attach_prog_fd: const = 0x0 (4 bytes)
  //        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[const[BPF_PROG_TYPE_XDP, int32],
  //        const[BPF_XDP, int32], const[0, int32], const[0,
  //        int32]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
  //        const[BPF_XDP, int32], const[0, int32], const[0, int32]]_pad_wrapper
  //        {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x94 (8 bytes)
  //  ]
  //  returns fd_bpf_prog_xdp
  *(uint32_t*)0x20000040 = 5;
  *(uint32_t*)0x20000044 = 4;
  *(uint64_t*)0x20000048 = 0;
  *(uint64_t*)0x20000050 = 0x20000000;
  memcpy((void*)0x20000000, "syzkaller\000", 10);
  *(uint32_t*)0x20000058 = 5;
  *(uint32_t*)0x2000005c = 0;
  *(uint64_t*)0x20000060 = 0;
  *(uint32_t*)0x20000068 = 0x7000000;
  *(uint32_t*)0x2000006c = 0;
  memset((void*)0x20000070, 0, 16);
  *(uint32_t*)0x20000080 = 0;
  *(uint32_t*)0x20000084 = 0x25;
  *(uint32_t*)0x20000088 = -1;
  *(uint32_t*)0x2000008c = 8;
  *(uint64_t*)0x20000090 = 0;
  *(uint32_t*)0x20000098 = 0;
  *(uint32_t*)0x2000009c = 0x10;
  *(uint64_t*)0x200000a0 = 0;
  *(uint32_t*)0x200000a8 = 0;
  *(uint32_t*)0x200000ac = 0;
  *(uint32_t*)0x200000b0 = 0;
  *(uint32_t*)0x200000b4 = 0;
  *(uint64_t*)0x200000b8 = 0;
  *(uint64_t*)0x200000c0 = 0;
  *(uint32_t*)0x200000c8 = 0x10;
  *(uint32_t*)0x200000cc = 0;
  *(uint32_t*)0x200000d0 = 0;
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000040ul, /*size=*/0x94ul);
  //  syz_init_net_socket$bt_l2cap arguments: [
  //    fam: const = 0x1f (8 bytes)
  //    type: bt_l2cap_type = 0x2 (8 bytes)
  //    proto: const = 0x0 (8 bytes)
  //  ]
  //  returns sock_bt_l2cap
  res = -1;
  res = syz_init_net_socket(/*fam=*/0x1f, /*type=SOCK_DGRAM*/ 2, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$sock_SIOCGIFINDEX_80211 arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8b30 (4 bytes)
  //    arg: ptr[out, ifreq_dev_t[nl80211_devnames, nl80211_ifindex]] {
  //      ifreq_dev_t[nl80211_devnames, nl80211_ifindex] {
  //        ifr_ifrn: buffer: {77 6c 61 6e 30 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) elem: nl80211_ifindex (resource) pad = 0x0 (20 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x20000040, "wlan0\000\000\000\000\000\000\000\000\000\000\000",
         16);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8b30, /*arg=*/0x20000040ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*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;
}