// https://syzkaller.appspot.com/bug?id=6c9acdee375e8b5520c144be6844b1a0aa803924
// 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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  *(uint32_t*)0x4000000000c0 = 0x1b;
  *(uint32_t*)0x4000000000c4 = 0;
  *(uint32_t*)0x4000000000c8 = 0;
  *(uint32_t*)0x4000000000cc = 0x8000;
  *(uint32_t*)0x4000000000d0 = 0;
  *(uint32_t*)0x4000000000d4 = -1;
  *(uint32_t*)0x4000000000d8 = 0;
  memset((void*)0x4000000000dc, 0, 16);
  *(uint32_t*)0x4000000000ec = 0;
  *(uint32_t*)0x4000000000f0 = -1;
  *(uint32_t*)0x4000000000f4 = 0;
  *(uint32_t*)0x4000000000f8 = 0;
  *(uint32_t*)0x4000000000fc = 0;
  *(uint64_t*)0x400000000100 = 0;
  *(uint32_t*)0x400000000108 = 0;
  *(uint32_t*)0x40000000010c = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x4000000000c0ul, /*size=*/0x48ul);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x400000000600 = 0x11;
  *(uint32_t*)0x400000000604 = 0x17;
  *(uint64_t*)0x400000000608 = 0x400000000a00;
  *(uint8_t*)0x400000000a00 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a01, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a01, 0, 4, 4);
  *(uint16_t*)0x400000000a02 = 0;
  *(uint32_t*)0x400000000a04 = 0x100;
  *(uint8_t*)0x400000000a08 = 0;
  *(uint8_t*)0x400000000a09 = 0;
  *(uint16_t*)0x400000000a0a = 0;
  *(uint32_t*)0x400000000a0c = 0xa;
  *(uint8_t*)0x400000000a10 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a11, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a11, 1, 4, 4);
  *(uint16_t*)0x400000000a12 = 0;
  *(uint32_t*)0x400000000a14 = r[0];
  *(uint8_t*)0x400000000a18 = 0;
  *(uint8_t*)0x400000000a19 = 0;
  *(uint16_t*)0x400000000a1a = 0;
  *(uint32_t*)0x400000000a1c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a20, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a20, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a20, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a21, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a21, 0, 4, 4);
  *(uint16_t*)0x400000000a22 = 0;
  *(uint32_t*)0x400000000a24 = 0x14;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a28, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a28, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a28, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a29, 3, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a29, 0, 4, 4);
  *(uint16_t*)0x400000000a2a = 0;
  *(uint32_t*)0x400000000a2c = 0;
  *(uint8_t*)0x400000000a30 = 0x85;
  *(uint8_t*)0x400000000a31 = 0;
  *(uint16_t*)0x400000000a32 = 0;
  *(uint32_t*)0x400000000a34 = 0x83;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a38, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a38, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a38, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a39, 9, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a39, 0, 4, 4);
  *(uint16_t*)0x400000000a3a = 0;
  *(uint32_t*)0x400000000a3c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a40, 5, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a40, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a40, 5, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a41, 9, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a41, 0, 4, 4);
  *(uint16_t*)0x400000000a42 = 1;
  *(uint32_t*)0x400000000a44 = 0;
  *(uint8_t*)0x400000000a48 = 0x95;
  *(uint8_t*)0x400000000a49 = 0;
  *(uint16_t*)0x400000000a4a = 0;
  *(uint32_t*)0x400000000a4c = 0;
  *(uint8_t*)0x400000000a50 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a51, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a51, 0, 4, 4);
  *(uint16_t*)0x400000000a52 = 0;
  *(uint32_t*)0x400000000a54 = 0x256c7820;
  *(uint8_t*)0x400000000a58 = 0;
  *(uint8_t*)0x400000000a59 = 0;
  *(uint16_t*)0x400000000a5a = 0;
  *(uint32_t*)0x400000000a5c = 0x20202000;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a60, 3, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a60, 3, 3, 2);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a60, 3, 5, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a61, 0xa, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a61, 1, 4, 4);
  *(uint16_t*)0x400000000a62 = 0xfff8;
  *(uint32_t*)0x400000000a64 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a68, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a68, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a68, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a69, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a69, 0xa, 4, 4);
  *(uint16_t*)0x400000000a6a = 0;
  *(uint32_t*)0x400000000a6c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a70, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a70, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a70, 0, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a71, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a71, 0, 4, 4);
  *(uint16_t*)0x400000000a72 = 0;
  *(uint32_t*)0x400000000a74 = 0xfffffff8;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a78, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a78, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a78, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a79, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a79, 0, 4, 4);
  *(uint16_t*)0x400000000a7a = 0;
  *(uint32_t*)0x400000000a7c = 8;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a80, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a80, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a80, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a81, 3, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a81, 0, 4, 4);
  *(uint16_t*)0x400000000a82 = 0;
  *(uint32_t*)0x400000000a84 = 0;
  *(uint8_t*)0x400000000a88 = 0x85;
  *(uint8_t*)0x400000000a89 = 0;
  *(uint16_t*)0x400000000a8a = 0;
  *(uint32_t*)0x400000000a8c = 6;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a90, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a90, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a90, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a91, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a91, 9, 4, 4);
  *(uint16_t*)0x400000000a92 = 0;
  *(uint32_t*)0x400000000a94 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x400000000a98, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a98, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a98, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a99, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000a99, 0, 4, 4);
  *(uint16_t*)0x400000000a9a = 0;
  *(uint32_t*)0x400000000a9c = 0;
  *(uint8_t*)0x400000000aa0 = 0x85;
  *(uint8_t*)0x400000000aa1 = 0;
  *(uint16_t*)0x400000000aa2 = 0;
  *(uint32_t*)0x400000000aa4 = 0x85;
  STORE_BY_BITMASK(uint8_t, , 0x400000000aa8, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x400000000aa8, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x400000000aa8, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000aa9, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x400000000aa9, 0, 4, 4);
  *(uint16_t*)0x400000000aaa = 0;
  *(uint32_t*)0x400000000aac = 0;
  *(uint8_t*)0x400000000ab0 = 0x95;
  *(uint8_t*)0x400000000ab1 = 0;
  *(uint16_t*)0x400000000ab2 = 0;
  *(uint32_t*)0x400000000ab4 = 0;
  *(uint64_t*)0x400000000610 = 0x4000000003c0;
  memcpy((void*)0x4000000003c0, "GPL\000", 4);
  *(uint32_t*)0x400000000618 = 0;
  *(uint32_t*)0x40000000061c = 0;
  *(uint64_t*)0x400000000620 = 0;
  *(uint32_t*)0x400000000628 = 0x41100;
  *(uint32_t*)0x40000000062c = 8;
  memset((void*)0x400000000630, 0, 16);
  *(uint32_t*)0x400000000640 = 0;
  *(uint32_t*)0x400000000644 = 0;
  *(uint32_t*)0x400000000648 = -1;
  *(uint32_t*)0x40000000064c = 8;
  *(uint64_t*)0x400000000650 = 0;
  *(uint32_t*)0x400000000658 = 0;
  *(uint32_t*)0x40000000065c = 0x10;
  *(uint64_t*)0x400000000660 = 0;
  *(uint32_t*)0x400000000668 = 0;
  *(uint32_t*)0x40000000066c = 0;
  *(uint32_t*)0x400000000670 = 0;
  *(uint32_t*)0x400000000674 = 0;
  *(uint64_t*)0x400000000678 = 0;
  *(uint64_t*)0x400000000680 = 0;
  *(uint32_t*)0x400000000688 = 0x10;
  *(uint32_t*)0x40000000068c = 0;
  *(uint32_t*)0x400000000690 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x400000000600ul, /*size=*/0x94ul);
  if (res != -1)
    r[1] = res;
  *(uint64_t*)0x400000000000 = 0x400000000040;
  memcpy((void*)0x400000000040, "contention_end\000", 15);
  *(uint32_t*)0x400000000008 = r[1];
  *(uint32_t*)0x40000000000c = 0;
  *(uint64_t*)0x400000000010 = 0;
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x400000000000ul, /*size=*/0x10ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x3ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x400000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x400001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}