// https://syzkaller.appspot.com/bug?id=2aabc827b8aea09353150377f96630a3ff18f6a3
// 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 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 < 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)) {
  }
  *(uint64_t*)0x20000980 = 0;
  *(uint32_t*)0x20000988 = -1;
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x20000980ul, /*size=*/0x10ul);
  res = syscall(__NR_socket, /*domain=*/2ul, /*type=*/1ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20000040 = 1;
  syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/1,
          /*optname=SO_ZEROCOPY*/ 0x3c, /*optval=*/0x20000040ul,
          /*optlen=*/0xfff0ul);
  *(uint32_t*)0x200000c0 = 1;
  syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/6, /*optname=*/0x13,
          /*optval=*/0x200000c0ul, /*optlen=*/4ul);
  *(uint16_t*)0x20000080 = 2;
  *(uint16_t*)0x20000082 = htobe16(0);
  *(uint32_t*)0x20000084 = htobe32(0x7f000001);
  syscall(__NR_connect, /*fd=*/r[0], /*addr=*/0x20000080ul, /*addrlen=*/0x10ul);
  *(uint32_t*)0x200001c0 = -1;
  syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/6, /*optname=*/0x13,
          /*optval=*/0x200001c0ul, /*optlen=*/4ul);
  syscall(__NR_write, /*fd=*/r[0], /*data=*/0x200014c0ul, /*len=*/0x46bul);
  *(uint64_t*)0x20000f40 = 0;
  *(uint32_t*)0x20000f48 = 0;
  *(uint64_t*)0x20000f50 = 0x20000500;
  *(uint64_t*)0x20000500 = 0x200006c0;
  memset((void*)0x200006c0, 237, 1);
  *(uint64_t*)0x20000508 = 1;
  *(uint64_t*)0x20000510 = 0x20000200;
  memset((void*)0x20000200, 181, 1);
  *(uint64_t*)0x20000518 = 1;
  *(uint64_t*)0x20000520 = 0x20000340;
  memset((void*)0x20000340, 46, 1);
  *(uint64_t*)0x20000528 = 1;
  *(uint64_t*)0x20000530 = 0x20000140;
  memset((void*)0x20000140, 85, 1);
  *(uint64_t*)0x20000538 = 1;
  *(uint64_t*)0x20000540 = 0x20000180;
  memset((void*)0x20000180, 243, 1);
  *(uint64_t*)0x20000548 = 1;
  *(uint64_t*)0x20000f58 = 0xa6;
  *(uint64_t*)0x20000f60 = 0;
  *(uint64_t*)0x20000f68 = 0;
  *(uint32_t*)0x20000f70 = 0;
  *(uint32_t*)0x20000f78 = 0;
  *(uint64_t*)0x20000f80 = 0;
  *(uint32_t*)0x20000f88 = 0;
  *(uint64_t*)0x20000f90 = 0x20000900;
  *(uint64_t*)0x20000900 = 0x20000580;
  memset((void*)0x20000580, 241, 1);
  *(uint64_t*)0x20000908 = 1;
  *(uint64_t*)0x20000910 = 0x20000c80;
  memset((void*)0x20000c80, 97, 1);
  *(uint64_t*)0x20000918 = 1;
  *(uint64_t*)0x20000920 = 0x20000b40;
  memset((void*)0x20000b40, 77, 1);
  *(uint64_t*)0x20000928 = 1;
  *(uint64_t*)0x20000930 = 0x20000d80;
  memset((void*)0x20000d80, 111, 1);
  *(uint64_t*)0x20000938 = 1;
  *(uint64_t*)0x20000940 = 0x20000e80;
  memset((void*)0x20000e80, 8, 1);
  *(uint64_t*)0x20000948 = 1;
  *(uint64_t*)0x20000f98 = 0xa6;
  *(uint64_t*)0x20000fa0 = 0;
  *(uint64_t*)0x20000fa8 = 0;
  *(uint32_t*)0x20000fb0 = 0;
  *(uint32_t*)0x20000fb8 = 0x70040000;
  *(uint64_t*)0x20000fc0 = 0;
  *(uint32_t*)0x20000fc8 = 0;
  *(uint64_t*)0x20000fd0 = 0x200002c0;
  *(uint64_t*)0x200002c0 = 0x20000380;
  memset((void*)0x20000380, 187, 1);
  *(uint64_t*)0x200002c8 = 1;
  *(uint64_t*)0x200002d0 = 0x200007c0;
  memset((void*)0x200007c0, 161, 1);
  *(uint64_t*)0x200002d8 = 1;
  *(uint64_t*)0x200002e0 = 0x20000800;
  memset((void*)0x20000800, 115, 1);
  *(uint64_t*)0x200002e8 = 1;
  *(uint64_t*)0x200002f0 = 0x200009c0;
  memset((void*)0x200009c0, 92, 1);
  *(uint64_t*)0x200002f8 = 1;
  *(uint64_t*)0x20000fd8 = 4;
  *(uint64_t*)0x20000fe0 = 0;
  *(uint64_t*)0x20000fe8 = 0;
  *(uint32_t*)0x20000ff0 = 0;
  *(uint32_t*)0x20000ff8 = 0;
  *(uint64_t*)0x20001000 = 0;
  *(uint32_t*)0x20001008 = 0;
  *(uint64_t*)0x20001010 = 0x20000dc0;
  *(uint64_t*)0x20000dc0 = 0x20000440;
  memset((void*)0x20000440, 136, 1);
  *(uint64_t*)0x20000dc8 = 1;
  *(uint64_t*)0x20000dd0 = 0x20000840;
  memset((void*)0x20000840, 229, 1);
  *(uint64_t*)0x20000dd8 = 1;
  *(uint64_t*)0x20000de0 = 0x20001040;
  memset((void*)0x20001040, 150, 1);
  *(uint64_t*)0x20000de8 = 1;
  *(uint64_t*)0x20001018 = 3;
  *(uint64_t*)0x20001020 = 0;
  *(uint64_t*)0x20001028 = 0;
  *(uint32_t*)0x20001030 = 0;
  *(uint32_t*)0x20001038 = 0;
  syscall(__NR_sendmmsg, /*fd=*/r[0], /*mmsg=*/0x20000f40ul, /*vlen=*/4ul,
          /*f=MSG_ZEROCOPY|MSG_BATCH|MSG_OOB|MSG_MORE|MSG_DONTWAIT|MSG_CONFIRM*/
          0x4048841ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}