// https://syzkaller.appspot.com/bug?id=aa11a3e8065df62bf94a2c8a579974d5b54a0166
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.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/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/capability.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static unsigned long long procid;

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;
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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;
}

#define MAX_FDS 30

static void setup_common()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void setup_binderfs()
{
  if (mkdir("/dev/binderfs", 0777)) {
  }
  if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
  }
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setsid();
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static void drop_caps(void)
{
  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    exit(1);
  const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
  cap_data[0].effective &= ~drop;
  cap_data[0].permitted &= ~drop;
  cap_data[0].inheritable &= ~drop;
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    exit(1);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  setup_common();
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  setup_binderfs();
  loop();
  exit(1);
}

static int inject_fault(int nth)
{
  int fd;
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  char buf[16];
  sprintf(buf, "%d", nth);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

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 close_fds()
{
  for (int fd = 3; fd < MAX_FDS; fd++)
    close(fd);
}

static void setup_fault()
{
  static struct {
    const char* file;
    const char* val;
    bool fatal;
  } files[] = {
      {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
      {"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
  };
  unsigned i;
  for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].file, files[i].val)) {
      if (files[i].fatal)
        exit(1);
    }
  }
}

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();
      close_fds();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/2ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000940 = 0;
  *(uint32_t*)0x20000948 = 0;
  *(uint64_t*)0x20000950 = 0x20000180;
  *(uint64_t*)0x20000180 = 0x20000000;
  memcpy((void*)0x20000000,
         "\xd8\x00\x00\x00\x18\x00\x81\x06\x4e\x81\xf7\x82\xdb\x44\xb9\x04\x02"
         "\x1d\x08\x00\x14\x00\x7c\x09\xe8\xfe\x55\xa1\x0a\x00\x15\x00\x04\x00"
         "\x14\x26\x03\x60\x0e\x12\x08\x00\x0f\x00\x00\x00\x04\x01\xa8\x00\x16"
         "\x00\xa4\x00\x01\x40\x03\x00\x00\x00\x03\x60\x10\xfa\xb9\x4d\xcf\x5c"
         "\x04\x61\xc1\xd6\x7f\x6f\x94\x00\x71\x34\xcf\x6e\xe0\x80\x00\xa0\xe4"
         "\x08\xe8\xd8\xef\x52\xa9\x85\x16\x27\x7c\xe0\x6b\xba\xce\x80\x17\xcb"
         "\xec\x4c\x2e\xe5\xa7\xce\xf4\x09\x00\x00\x00\x1f\xb7\x91\x64\x3a\x5e"
         "\xe4\xce\x1b\x14\xd6\xd9\x30\xdf\xe1\xd9\xd3\x22\xfe\x7c\x9f\x87\x75"
         "\x73\x0d\x16\xa4\x68\x3f\x5a\xeb\x4e\xdb\xb5\x7a\x50\x25\xcc\xca\x9e"
         "\x00\x36\x0d\xb7\x01\x00\x00\x00\x40\xfa\xd9\x56\x67\xe0\x06\xdc\xdf"
         "\x63\x95\x1f\x21\x5c\xe3\xbb\x9a\xd8\x09\xd5\xe1\xca\xce\x81\xed\x0b"
         "\xff\xec\xe0\xb4\x2a\x9e\xcb\xee\x5d\xe6\xcc\xd4\x0d\xd6\xe4\xed\xef"
         "\x3d\x93\x45\x2a\x92\x95\x4b\x43\x37\x0e\x97\x01",
         216);
  *(uint64_t*)0x20000188 = 0xd8;
  *(uint64_t*)0x20000958 = 1;
  *(uint64_t*)0x20000960 = 0;
  *(uint64_t*)0x20000968 = 0;
  *(uint32_t*)0x20000970 = 0;
  inject_fault(10);
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x20000940ul, /*f=*/0ul);
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0ul, /*size=*/0ul);
  syscall(__NR_perf_event_open, /*attr=*/0ul, /*pid=*/0, /*cpu=*/-1,
          /*group=*/-1, /*flags=*/9ul);
  *(uint32_t*)0x200000c0 = 0x11;
  *(uint32_t*)0x200000c4 = 0xb;
  *(uint64_t*)0x200000c8 = 0x20000340;
  *(uint8_t*)0x20000340 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x20000341, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000341, 0, 4, 4);
  *(uint16_t*)0x20000342 = 0;
  *(uint32_t*)0x20000344 = 0;
  *(uint8_t*)0x20000348 = 0;
  *(uint8_t*)0x20000349 = 0;
  *(uint16_t*)0x2000034a = 0;
  *(uint32_t*)0x2000034c = 0;
  *(uint8_t*)0x20000350 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x20000351, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000351, 0, 4, 4);
  *(uint16_t*)0x20000352 = 0;
  *(uint32_t*)0x20000354 = 0x25702020;
  *(uint8_t*)0x20000358 = 0;
  *(uint8_t*)0x20000359 = 0;
  *(uint16_t*)0x2000035a = 0;
  *(uint32_t*)0x2000035c = 0x20202000;
  STORE_BY_BITMASK(uint8_t, , 0x20000360, 3, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x20000360, 3, 3, 2);
  STORE_BY_BITMASK(uint8_t, , 0x20000360, 3, 5, 3);
  STORE_BY_BITMASK(uint8_t, , 0x20000361, 0xa, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000361, 1, 4, 4);
  *(uint16_t*)0x20000362 = 0xfff8;
  *(uint32_t*)0x20000364 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x20000368, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x20000368, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x20000368, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000369, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000369, 0xa, 4, 4);
  *(uint16_t*)0x2000036a = 0;
  *(uint32_t*)0x2000036c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x20000370, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x20000370, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x20000370, 0, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000371, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000371, 0, 4, 4);
  *(uint16_t*)0x20000372 = 0;
  *(uint32_t*)0x20000374 = 0xfffffff8;
  STORE_BY_BITMASK(uint8_t, , 0x20000378, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x20000378, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x20000378, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000379, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000379, 0, 4, 4);
  *(uint16_t*)0x2000037a = 0;
  *(uint32_t*)0x2000037c = 5;
  STORE_BY_BITMASK(uint8_t, , 0x20000380, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x20000380, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x20000380, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000381, 3, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x20000381, 0, 4, 4);
  *(uint16_t*)0x20000382 = 0;
  *(uint32_t*)0x20000384 = 0;
  *(uint8_t*)0x20000388 = 0x85;
  *(uint8_t*)0x20000389 = 0;
  *(uint16_t*)0x2000038a = 0;
  *(uint32_t*)0x2000038c = 0x72;
  *(uint8_t*)0x20000390 = 0x95;
  *(uint8_t*)0x20000391 = 0;
  *(uint16_t*)0x20000392 = 0;
  *(uint32_t*)0x20000394 = 0;
  *(uint64_t*)0x200000d0 = 0x20000200;
  memcpy((void*)0x20000200, "GPL\000", 4);
  *(uint32_t*)0x200000d8 = 0;
  *(uint32_t*)0x200000dc = 0;
  *(uint64_t*)0x200000e0 = 0;
  *(uint32_t*)0x200000e8 = 0;
  *(uint32_t*)0x200000ec = 0;
  memset((void*)0x200000f0, 0, 16);
  *(uint32_t*)0x20000100 = 0;
  *(uint32_t*)0x20000104 = 0;
  *(uint32_t*)0x20000108 = -1;
  *(uint32_t*)0x2000010c = 0;
  *(uint64_t*)0x20000110 = 0;
  *(uint32_t*)0x20000118 = 0;
  *(uint32_t*)0x2000011c = 0;
  *(uint64_t*)0x20000120 = 0;
  *(uint32_t*)0x20000128 = 0;
  *(uint32_t*)0x2000012c = 0;
  *(uint32_t*)0x20000130 = 0;
  *(uint32_t*)0x20000134 = 0;
  *(uint64_t*)0x20000138 = 0;
  *(uint64_t*)0x20000140 = 0;
  *(uint32_t*)0x20000148 = 0;
  *(uint32_t*)0x2000014c = 0;
  res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul);
  if (res != -1)
    r[1] = res;
  syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0ul, /*size=*/0ul);
  *(uint64_t*)0x20000540 = 0x20000140;
  memcpy((void*)0x20000140, "sched_switch\000", 13);
  *(uint32_t*)0x20000548 = r[1];
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x20000540ul, /*size=*/0x10ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  setup_fault();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}