// https://syzkaller.appspot.com/bug?id=44fd77a867a0a5bc6fec6cb2939ebb6c905aa26b
// 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 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;
}

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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  *(uint32_t*)0x200000000280 = 1;
  *(uint32_t*)0x200000000284 = 4;
  *(uint32_t*)0x200000000288 = 0xff;
  *(uint32_t*)0x20000000028c = 1;
  *(uint32_t*)0x200000000290 = 0;
  *(uint32_t*)0x200000000294 = -1;
  *(uint32_t*)0x200000000298 = 0;
  memset((void*)0x20000000029c, 0, 16);
  *(uint32_t*)0x2000000002ac = 0;
  *(uint32_t*)0x2000000002b0 = -1;
  *(uint32_t*)0x2000000002b4 = 0;
  *(uint32_t*)0x2000000002b8 = 0;
  *(uint32_t*)0x2000000002bc = 0;
  *(uint64_t*)0x2000000002c0 = 0;
  *(uint32_t*)0x2000000002c8 = 0;
  *(uint32_t*)0x2000000002cc = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200000000280ul, /*size=*/0x50ul);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x200000000340 = 2;
  *(uint32_t*)0x200000000344 = 4;
  *(uint32_t*)0x200000000348 = 8;
  *(uint32_t*)0x20000000034c = 1;
  *(uint32_t*)0x200000000350 = 0x80;
  *(uint32_t*)0x200000000354 = -1;
  *(uint32_t*)0x200000000358 = 0;
  memset((void*)0x20000000035c, 0, 16);
  *(uint32_t*)0x20000000036c = 0;
  *(uint32_t*)0x200000000370 = -1;
  *(uint32_t*)0x200000000374 = 0;
  *(uint32_t*)0x200000000378 = 0;
  *(uint32_t*)0x20000000037c = 0;
  *(uint64_t*)0x200000000380 = 0;
  *(uint32_t*)0x200000000388 = 0;
  *(uint32_t*)0x20000000038c = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200000000340ul, /*size=*/0x50ul);
  if (res != -1)
    r[1] = res;
  *(uint32_t*)0x2000000000c0 = r[1];
  syscall(__NR_bpf, /*cmd=*/0x16ul, /*arg=*/0x2000000000c0ul, /*size=*/4ul);
  *(uint32_t*)0x200000000000 = r[0];
  *(uint64_t*)0x200000000008 = 0x200000000580;
  *(uint32_t*)0x200000000580 = 0;
  *(uint64_t*)0x200000000010 = 0x2000000005c0;
  *(uint32_t*)0x2000000005c0 = -1;
  *(uint64_t*)0x200000000018 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x200000000000ul, /*size=*/0x20ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x200000000000;
  *(uint32_t*)0x200000000200 = 0x11;
  *(uint32_t*)0x200000000204 = 0x19;
  *(uint64_t*)0x200000000208 = 0x200000000600;
  *(uint8_t*)0x200000000600 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x200000000601, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000601, 0, 4, 4);
  *(uint16_t*)0x200000000602 = 0;
  *(uint32_t*)0x200000000604 = 0;
  *(uint8_t*)0x200000000608 = 0;
  *(uint8_t*)0x200000000609 = 0;
  *(uint16_t*)0x20000000060a = 0;
  *(uint32_t*)0x20000000060c = 0;
  *(uint8_t*)0x200000000610 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x200000000611, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000611, 1, 4, 4);
  *(uint16_t*)0x200000000612 = 0;
  *(uint32_t*)0x200000000614 = r[2];
  *(uint8_t*)0x200000000618 = 0;
  *(uint8_t*)0x200000000619 = 0;
  *(uint16_t*)0x20000000061a = 0;
  *(uint32_t*)0x20000000061c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000620, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000620, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000620, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000621, 8, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000621, 0, 4, 4);
  *(uint16_t*)0x200000000622 = 0;
  *(uint32_t*)0x200000000624 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000628, 3, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000628, 3, 3, 2);
  STORE_BY_BITMASK(uint8_t, , 0x200000000628, 3, 5, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000629, 0xa, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000629, 8, 4, 4);
  *(uint16_t*)0x20000000062a = 0xfff8;
  *(uint32_t*)0x20000000062c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000630, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000630, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000630, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000631, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000631, 0xa, 4, 4);
  *(uint16_t*)0x200000000632 = 0;
  *(uint32_t*)0x200000000634 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000638, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000638, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000638, 0, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000639, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000639, 0, 4, 4);
  *(uint16_t*)0x20000000063a = 0;
  *(uint32_t*)0x20000000063c = 0xfffffff8;
  STORE_BY_BITMASK(uint8_t, , 0x200000000640, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000640, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000640, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000641, 3, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000641, 0, 4, 4);
  *(uint16_t*)0x200000000642 = 0;
  *(uint32_t*)0x200000000644 = 8;
  STORE_BY_BITMASK(uint8_t, , 0x200000000648, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000648, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000648, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000649, 4, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000649, 0, 4, 4);
  *(uint16_t*)0x20000000064a = 0;
  *(uint32_t*)0x20000000064c = 0;
  *(uint8_t*)0x200000000650 = 0x85;
  *(uint8_t*)0x200000000651 = 0;
  *(uint16_t*)0x200000000652 = 0;
  *(uint32_t*)0x200000000654 = 3;
  STORE_BY_BITMASK(uint8_t, , 0x200000000658, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000658, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000658, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000659, 8, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000659, 0, 4, 4);
  *(uint16_t*)0x20000000065a = 0;
  *(uint32_t*)0x20000000065c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000660, 3, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000660, 3, 3, 2);
  STORE_BY_BITMASK(uint8_t, , 0x200000000660, 3, 5, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000661, 0xa, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000661, 8, 4, 4);
  *(uint16_t*)0x200000000662 = 0xfff8;
  *(uint32_t*)0x200000000664 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000668, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000668, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000668, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000669, 8, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000669, 0, 4, 4);
  *(uint16_t*)0x20000000066a = 0;
  *(uint32_t*)0x20000000066c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000670, 3, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000670, 3, 3, 2);
  STORE_BY_BITMASK(uint8_t, , 0x200000000670, 3, 5, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000671, 0xa, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000671, 8, 4, 4);
  *(uint16_t*)0x200000000672 = 0xfff0;
  *(uint32_t*)0x200000000674 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000678, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000678, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000678, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000679, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000679, 0xa, 4, 4);
  *(uint16_t*)0x20000000067a = 0;
  *(uint32_t*)0x20000000067c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000680, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000680, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000680, 0, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000681, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000681, 0, 4, 4);
  *(uint16_t*)0x200000000682 = 0;
  *(uint32_t*)0x200000000684 = 0xfffffff8;
  STORE_BY_BITMASK(uint8_t, , 0x200000000688, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000688, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000688, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000689, 4, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000689, 0xa, 4, 4);
  *(uint16_t*)0x20000000068a = 0;
  *(uint32_t*)0x20000000068c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000690, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000690, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000690, 0, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000691, 4, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000691, 0, 4, 4);
  *(uint16_t*)0x200000000692 = 0;
  *(uint32_t*)0x200000000694 = 0xfffffff0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000698, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000698, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000698, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000699, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000699, 0, 4, 4);
  *(uint16_t*)0x20000000069a = 0;
  *(uint32_t*)0x20000000069c = 8;
  *(uint8_t*)0x2000000006a0 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x2000000006a1, 3, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x2000000006a1, 2, 4, 4);
  *(uint16_t*)0x2000000006a2 = 0;
  *(uint32_t*)0x2000000006a4 = r[1];
  *(uint8_t*)0x2000000006a8 = 0;
  *(uint8_t*)0x2000000006a9 = 0;
  *(uint16_t*)0x2000000006aa = 0;
  *(uint32_t*)0x2000000006ac = 0;
  STORE_BY_BITMASK(uint8_t, , 0x2000000006b0, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x2000000006b0, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x2000000006b0, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x2000000006b1, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x2000000006b1, 0, 4, 4);
  *(uint16_t*)0x2000000006b2 = 0;
  *(uint32_t*)0x2000000006b4 = 8;
  *(uint8_t*)0x2000000006b8 = 0x85;
  *(uint8_t*)0x2000000006b9 = 0;
  *(uint16_t*)0x2000000006ba = 0;
  *(uint32_t*)0x2000000006bc = 0xa5;
  *(uint8_t*)0x2000000006c0 = 0x95;
  *(uint8_t*)0x2000000006c1 = 0;
  *(uint16_t*)0x2000000006c2 = 0;
  *(uint32_t*)0x2000000006c4 = 0;
  *(uint64_t*)0x200000000210 = 0x200000000040;
  memcpy((void*)0x200000000040, "GPL\000", 4);
  *(uint32_t*)0x200000000218 = 0;
  *(uint32_t*)0x20000000021c = 0;
  *(uint64_t*)0x200000000220 = 0;
  *(uint32_t*)0x200000000228 = 0;
  *(uint32_t*)0x20000000022c = 0;
  memset((void*)0x200000000230, 0, 16);
  *(uint32_t*)0x200000000240 = 0;
  *(uint32_t*)0x200000000244 = 0;
  *(uint32_t*)0x200000000248 = -1;
  *(uint32_t*)0x20000000024c = 0;
  *(uint64_t*)0x200000000250 = 0;
  *(uint32_t*)0x200000000258 = 0;
  *(uint32_t*)0x20000000025c = 0;
  *(uint64_t*)0x200000000260 = 0;
  *(uint32_t*)0x200000000268 = 0;
  *(uint32_t*)0x20000000026c = 0;
  *(uint32_t*)0x200000000270 = 0;
  *(uint32_t*)0x200000000274 = 0;
  *(uint64_t*)0x200000000278 = 0;
  *(uint64_t*)0x200000000280 = 0;
  *(uint32_t*)0x200000000288 = 0;
  *(uint32_t*)0x20000000028c = 0;
  *(uint32_t*)0x200000000290 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000200ul, /*size=*/0x90ul);
  if (res != -1)
    r[3] = res;
  *(uint64_t*)0x2000000001c0 = 0x200000000180;
  memcpy((void*)0x200000000180, "kfree\000", 6);
  *(uint32_t*)0x2000000001c8 = r[3];
  *(uint32_t*)0x2000000001cc = 0;
  *(uint64_t*)0x2000000001d0 = 0;
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x2000000001c0ul, /*size=*/0x10ul);
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0ul, /*size=*/0ul);
}
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;
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}