// https://syzkaller.appspot.com/bug?id=1181baf9a45750c390396fb9483189591b20ad19
// 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>

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)) {
  }
  //  socket$packet arguments: [
  //    domain: const = 0x11 (8 bytes)
  //    type: packet_socket_type = 0x3 (8 bytes)
  //    proto: const = 0x300 (4 bytes)
  //  ]
  //  returns sock_packet
  res = syscall(__NR_socket, /*domain=*/0x11ul, /*type=SOCK_RAW*/ 3ul,
                /*proto=*/0x300);
  if (res != -1)
    r[0] = res;
  //  bind$packet arguments: [
  //    fd: sock_packet (resource)
  //    addr: ptr[in, sockaddr_ll] {
  //      sockaddr_ll {
  //        sll_family: const = 0x11 (2 bytes)
  //        sll_protocol: packet_protocols = 0x15 (2 bytes)
  //        sll_ifindex: ifindex (resource)
  //        sll_hatype: const = 0x1 (2 bytes)
  //        sll_pkttype: int8 = 0xff (1 bytes)
  //        sll_halen: const = 0x6 (1 bytes)
  //        sll_addr: union mac_addr {
  //          random: buffer: {00 11 04 00 00 00} (length 0x6)
  //        }
  //        pad: buffer: {00 00} (length 0x2)
  //      }
  //    }
  //    addrlen: len = 0x14 (8 bytes)
  //  ]
  *(uint16_t*)0x200000000200 = 0x11;
  *(uint16_t*)0x200000000202 = htobe16(0x15);
  *(uint32_t*)0x200000000204 = 1;
  *(uint16_t*)0x200000000208 = 1;
  *(uint8_t*)0x20000000020a = -1;
  *(uint8_t*)0x20000000020b = 6;
  memcpy((void*)0x20000000020c, "\x00\x11\x04\x00\x00\x00", 6);
  memset((void*)0x200000000212, 0, 2);
  syscall(__NR_bind, /*fd=*/r[0], /*addr=*/0x200000000200ul,
          /*addrlen=*/0x14ul);
  //  setsockopt$packet_tx_ring arguments: [
  //    fd: sock_packet (resource)
  //    level: const = 0x107 (4 bytes)
  //    optname: const = 0xd (4 bytes)
  //    optval: ptr[in, tpacket_req_u] {
  //      union tpacket_req_u {
  //        req: tpacket_req {
  //          tp_block_size: int32 = 0x1000 (4 bytes)
  //          tp_block_nr: int32 = 0x4 (4 bytes)
  //          tp_frame_size: int32 = 0x800 (4 bytes)
  //          tp_frame_nr: int32 = 0x8 (4 bytes)
  //        }
  //      }
  //    }
  //    optlen: len = 0x10 (8 bytes)
  //  ]
  *(uint32_t*)0x2000000000c0 = 0x1000;
  *(uint32_t*)0x2000000000c4 = 4;
  *(uint32_t*)0x2000000000c8 = 0x800;
  *(uint32_t*)0x2000000000cc = 8;
  syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0x107, /*optname=*/0xd,
          /*optval=*/0x2000000000c0ul, /*optlen=*/0x10ul);
  //  mmap arguments: [
  //    addr: VMA[0x4000]
  //    len: len = 0x4000 (4 bytes)
  //    prot: mmap_prot = 0x3 (8 bytes)
  //    flags: mmap_flags = 0x11 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0x0 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x4000,
          /*prot=PROT_WRITE|PROT_READ*/ 3ul,
          /*flags=MAP_FIXED|MAP_SHARED*/ 0x11ul, /*fd=*/r[0], /*offset=*/0ul);
  //  readv arguments: [
  //    fd: fd (resource)
  //    vec: ptr[in, array[iovec[out, array[int8]]]] {
  //      array[iovec[out, array[int8]]] {
  //        iovec[out, array[int8]] {
  //          addr: ptr[out, buffer] {
  //            buffer: (DirOut)
  //          }
  //          len: len = 0xfffffdef (8 bytes)
  //        }
  //      }
  //    }
  //    vlen: len = 0x1 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000000 = 0x2000000000c0;
  *(uint64_t*)0x200000000008 = 0xfffffdef;
  syscall(__NR_readv, /*fd=*/(intptr_t)-1, /*vec=*/0x200000000000ul,
          /*vlen=*/1ul);
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {01} (length 0x1)
  //    }
  //    count: len = 0x1 (8 bytes)
  //  ]
  memset((void*)0x200000000000, 1, 1);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000000ul, /*count=*/1ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*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=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}