// https://syzkaller.appspot.com/bug?id=00e3a1fdda26ca5e57d814485da4e3f92a9faf6d
// 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 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;
}

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)) {
  }
  //  epoll_create arguments: [
  //    size: int32 = 0x7 (4 bytes)
  //  ]
  //  returns fd_epoll
  res = syscall(__NR_epoll_create, /*size=*/7);
  if (res != -1)
    r[0] = res;
  //  epoll_create arguments: [
  //    size: int32 = 0x7 (4 bytes)
  //  ]
  //  returns fd_epoll
  res = syscall(__NR_epoll_create, /*size=*/7);
  if (res != -1)
    r[1] = res;
  //  epoll_create1 arguments: [
  //    flags: epoll_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_epoll
  res = syscall(__NR_epoll_create1, /*flags=*/0ul);
  if (res != -1)
    r[2] = res;
  //  close arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_close, /*fd=*/3);
  //  bpf$MAP_CREATE arguments: [
  //    cmd: const = 0x0 (8 bytes)
  //    arg: ptr[in, bpf_map_create_arg] {
  //      union bpf_map_create_arg {
  //        base: bpf_map_create_arg_t[flags[bpf_map_type, int32], int32, int32,
  //        int32, flags[map_flags, int32], const[0, int64]] {
  //          type: bpf_map_type = 0xb (4 bytes)
  //          ksize: int32 = 0x7 (4 bytes)
  //          vsize: int32 = 0x10001 (4 bytes)
  //          max: int32 = 0x9 (4 bytes)
  //          flags: map_flags = 0x1 (4 bytes)
  //          inner: fd_bpf_map (resource)
  //          node: int32 = 0xfffffffc (4 bytes)
  //          map_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //          00} (length 0x10) map_ifindex: ifindex (resource) btf_fd: fd_btf
  //          (resource) btf_key_type_id: int32 = 0x0 (4 bytes)
  //          btf_value_type_id: int32 = 0x0 (4 bytes)
  //          btf_vmlinux_type_id: int32 = 0x0 (4 bytes)
  //          map_extra: const = 0x0 (8 bytes)
  //          value_type_btf_obj_fd: union
  //          _bpf_map_create_arg_t[flags[bpf_map_type, int32], int32, int32,
  //          int32, flags[map_flags, int32], const[0,
  //          int64]]_value_type_btf_obj_fd_wrapper {
  //            void: buffer: {} (length 0x0)
  //          }
  //          pad1: union _bpf_map_create_arg_t[flags[bpf_map_type, int32],
  //          int32, int32, int32, flags[map_flags, int32], const[0,
  //          int64]]_pad1_wrapper {
  //            value: const = 0x0 (4 bytes)
  //          }
  //          map_token_fd: union _bpf_map_create_arg_t[flags[bpf_map_type,
  //          int32], int32, int32, int32, flags[map_flags, int32], const[0,
  //          int64]]_map_token_fd_wrapper {
  //            void: buffer: {} (length 0x0)
  //          }
  //          pad2: union _bpf_map_create_arg_t[flags[bpf_map_type, int32],
  //          int32, int32, int32, flags[map_flags, int32], const[0,
  //          int64]]_pad2_wrapper {
  //            value: const = 0x0 (4 bytes)
  //          }
  //        }
  //      }
  //    }
  //    size: len = 0x50 (8 bytes)
  //  ]
  //  returns fd_bpf_map
  *(uint32_t*)0x200000000180 = 0xb;
  *(uint32_t*)0x200000000184 = 7;
  *(uint32_t*)0x200000000188 = 0x10001;
  *(uint32_t*)0x20000000018c = 9;
  *(uint32_t*)0x200000000190 = 1;
  *(uint32_t*)0x200000000194 = -1;
  *(uint32_t*)0x200000000198 = 0xfffffffc;
  memset((void*)0x20000000019c, 0, 16);
  *(uint32_t*)0x2000000001ac = 0;
  *(uint32_t*)0x2000000001b0 = -1;
  *(uint32_t*)0x2000000001b4 = 0;
  *(uint32_t*)0x2000000001b8 = 0;
  *(uint32_t*)0x2000000001bc = 0;
  *(uint64_t*)0x2000000001c0 = 0;
  *(uint32_t*)0x2000000001c8 = 0;
  *(uint32_t*)0x2000000001cc = 0;
  syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200000000180ul, /*size=*/0x50ul);
  //  epoll_ctl$EPOLL_CTL_ADD arguments: [
  //    epfd: fd_epoll (resource)
  //    op: const = 0x1 (8 bytes)
  //    fd: fd (resource)
  //    ev: ptr[in, epoll_event] {
  //      epoll_event {
  //        ev: epoll_ev = 0x0 (4 bytes)
  //        data: const = 0x0 (8 bytes)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000100 = 0;
  *(uint64_t*)0x200000000104 = 0;
  syscall(__NR_epoll_ctl, /*epfd=*/r[2], /*op=*/1ul, /*fd=*/r[1],
          /*ev=*/0x200000000100ul);
  //  epoll_ctl$EPOLL_CTL_ADD arguments: [
  //    epfd: fd_epoll (resource)
  //    op: const = 0x1 (8 bytes)
  //    fd: fd (resource)
  //    ev: ptr[in, epoll_event] {
  //      epoll_event {
  //        ev: epoll_ev = 0x0 (4 bytes)
  //        data: const = 0x0 (8 bytes)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000040 = 0;
  *(uint64_t*)0x200000000044 = 0;
  syscall(__NR_epoll_ctl, /*epfd=*/r[2], /*op=*/1ul, /*fd=*/r[0],
          /*ev=*/0x200000000040ul);
  //  epoll_create1 arguments: [
  //    flags: epoll_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_epoll
  res = syscall(__NR_epoll_create1, /*flags=*/0ul);
  if (res != -1)
    r[3] = res;
  //  epoll_ctl$EPOLL_CTL_ADD arguments: [
  //    epfd: fd_epoll (resource)
  //    op: const = 0x1 (8 bytes)
  //    fd: fd (resource)
  //    ev: ptr[in, epoll_event] {
  //      epoll_event {
  //        ev: epoll_ev = 0x60000000 (4 bytes)
  //        data: const = 0x0 (8 bytes)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000140 = 0x60000000;
  *(uint64_t*)0x200000000144 = 0;
  syscall(__NR_epoll_ctl, /*epfd=*/r[1], /*op=*/1ul, /*fd=*/r[0],
          /*ev=*/0x200000000140ul);
  //  epoll_ctl$EPOLL_CTL_ADD arguments: [
  //    epfd: fd_epoll (resource)
  //    op: const = 0x1 (8 bytes)
  //    fd: fd (resource)
  //    ev: ptr[in, epoll_event] {
  //      epoll_event {
  //        ev: epoll_ev = 0x0 (4 bytes)
  //        data: const = 0x0 (8 bytes)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000000 = 0;
  *(uint64_t*)0x200000000004 = 0;
  syscall(__NR_epoll_ctl, /*epfd=*/r[3], /*op=*/1ul, /*fd=*/r[2],
          /*ev=*/0x200000000000ul);
}
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 < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}