// https://syzkaller.appspot.com/bug?id=b4b82fbf2f5c575e559e31893b95b393248f5333
// 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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 00} (length 0x7)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000100, "./proc\000", 7);
  syscall(
      __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000100ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 00} (length 0x7)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {70 72 6f 63 00} (length 0x5)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x200000000100, "./proc\000", 7);
  memcpy((void*)0x200000000140, "proc\000", 5);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000100ul,
          /*type=*/0x200000000140ul, /*flags=*/0ul, /*data=*/0ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 2f 73 79 73 2f 6e 65 74 2f 69 70 76 36 2f
  //      63 6f 6e 66 2f 6c 6f 2f 6b 65 65 70 5f 61 64 64 72 5f 6f 6e 5f 64 6f
  //      77 6e 00} (length 0x2e)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000000,
         "./proc/sys/net/ipv6/conf/lo/keep_addr_on_down\000", 46);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000000ul,
                /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {31 0a} (length 0x2)
  //    }
  //    count: len = 0x2 (8 bytes)
  //  ]
  memcpy((void*)0x200000000040, "1\n", 2);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000040ul, /*count=*/2ul);
  //  socket$inet6 arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: socket_type = 0x2 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock_in6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_DGRAM*/ 2ul,
                /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  ioctl$sock_inet6_SIOCSIFADDR arguments: [
  //    fd: sock_in6 (resource)
  //    cmd: const = 0x8916 (4 bytes)
  //    arg: ptr[in, in6_ifreq] {
  //      in6_ifreq {
  //        ifr6_addr: union ipv6_addr {
  //          private0: ipv6_addr_private[0] {
  //            a0: const = 0xfc (1 bytes)
  //            a1: const = 0x0 (1 bytes)
  //            a2: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00} (length
  //            0xd) a3: int8 = 0x0 (1 bytes)
  //          }
  //        }
  //        ifr6_prefixlen: int32 = 0x40 (4 bytes)
  //        ifr6_ifindex: ifindex (resource)
  //      }
  //    }
  //  ]
  *(uint8_t*)0x200000000080 = 0xfc;
  *(uint8_t*)0x200000000081 = 0;
  memset((void*)0x200000000082, 0, 13);
  *(uint8_t*)0x20000000008f = 0;
  *(uint32_t*)0x200000000090 = 0x40;
  *(uint32_t*)0x200000000094 = 1;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8916, /*arg=*/0x200000000080ul);
  //  socket$netlink arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: netlink_proto = 0x0 (4 bytes)
  //  ]
  //  returns sock_netlink
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[2] = res;
  //  writev arguments: [
  //    fd: fd (resource)
  //    vec: ptr[in, array[iovec[in, array[int8]]]] {
  //      array[iovec[in, array[int8]]] {
  //        iovec[in, array[int8]] {
  //          addr: ptr[in, buffer] {
  //            buffer: {39 00 00 00 13 00 03 47 00 bb 65 e1 c3 e4 ff ff 01 00
  //            00 00 01 00 00 00 56 00 00 00 25 00 00 00 19 00 04 00 04 00 00
  //            00 07 fd 17 e5 ff ff 08 00 04 00 00 00 00 00 00 00 00} (length
  //            0x39)
  //          }
  //          len: len = 0x39 (8 bytes)
  //        }
  //      }
  //    }
  //    vlen: len = 0x1 (8 bytes)
  //  ]
  *(uint64_t*)0x2000000003c0 = 0x200000000180;
  memcpy((void*)0x200000000180,
         "\x39\x00\x00\x00\x13\x00\x03\x47\x00\xbb\x65\xe1\xc3\xe4\xff\xff\x01"
         "\x00\x00\x00\x01\x00\x00\x00\x56\x00\x00\x00\x25\x00\x00\x00\x19\x00"
         "\x04\x00\x04\x00\x00\x00\x07\xfd\x17\xe5\xff\xff\x08\x00\x04\x00\x00"
         "\x00\x00\x00\x00\x00\x00",
         57);
  *(uint64_t*)0x2000000003c8 = 0x39;
  syscall(__NR_writev, /*fd=*/r[2], /*vec=*/0x2000000003c0ul, /*vlen=*/1ul);
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[3] = res;
  //  sendmsg$nl_route arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route]] {
  //      msghdr_netlink[netlink_msg_route] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route]] {
  //          iovec[in, netlink_msg_route] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {28 00 00 00 10 00 01 00 24 bd 70 00 fc
  //                  0d df 25 00 00 00 00} (length 0x14)
  //                }
  //                union ANYUNION {
  //                  ANYRES32: ANYRES32 (resource)
  //                }
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {1b 0b 04 00 03 00 00 00 08 00 1b}
  //                  (length 0xb)
  //                }
  //              }
  //            }
  //            len: len = 0x28 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x68010 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000200 = 0;
  *(uint32_t*)0x200000000208 = 0;
  *(uint64_t*)0x200000000210 = 0x200000000180;
  *(uint64_t*)0x200000000180 = 0x2000000000c0;
  memcpy((void*)0x2000000000c0,
         "\x28\x00\x00\x00\x10\x00\x01\x00\x24\xbd\x70\x00\xfc\x0d\xdf\x25\x00"
         "\x00\x00\x00",
         20);
  *(uint32_t*)0x2000000000d4 = 0;
  memcpy((void*)0x2000000000d8, "\x1b\x0b\x04\x00\x03\x00\x00\x00\x08\x00\x1b",
         11);
  *(uint64_t*)0x200000000188 = 0x28;
  *(uint64_t*)0x200000000218 = 1;
  *(uint64_t*)0x200000000220 = 0;
  *(uint64_t*)0x200000000228 = 0;
  *(uint32_t*)0x200000000230 = 0x68010;
  syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x200000000200ul, /*f=*/0ul);
}
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;
}