// https://syzkaller.appspot.com/bug?id=e9e527ca92fea44c4e792fd4c17d55c36b44bca2
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.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/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include <linux/capability.h>

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 setup_gadgetfs();
static void setup_binderfs();
static void setup_fusectl();
static void sandbox_common_mount_tmpfs(void)
{
  write_file("/proc/sys/fs/mount-max", "100000");
  if (mkdir("./syz-tmp", 0777))
    exit(1);
  if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot", 0777))
    exit(1);
  if (mkdir("./syz-tmp/newroot/dev", 0700))
    exit(1);
  unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/proc", 0700))
    exit(1);
  if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/selinux", 0700))
    exit(1);
  const char* selinux_path = "./syz-tmp/newroot/selinux";
  if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) {
    if (errno != ENOENT)
      exit(1);
    if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) &&
        errno != ENOENT)
      exit(1);
  }
  if (mkdir("./syz-tmp/newroot/sys", 0700))
    exit(1);
  if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL))
    exit(1);
  if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/proc/sys/fs/binfmt_misc",
            "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags,
            NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/newroot/syz-inputs", 0700))
    exit(1);
  if (mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL,
            bind_mount_flags | MS_RDONLY, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/pivot", 0777))
    exit(1);
  if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
    if (chdir("./syz-tmp"))
      exit(1);
  } else {
    if (chdir("/"))
      exit(1);
    if (umount2("./pivot", MNT_DETACH))
      exit(1);
  }
  if (chroot("./newroot"))
    exit(1);
  if (chdir("/"))
    exit(1);
  setup_gadgetfs();
  setup_binderfs();
  setup_fusectl();
}

static void setup_gadgetfs()
{
  if (mkdir("/dev/gadgetfs", 0777)) {
  }
  if (mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL)) {
  }
}

static void setup_fusectl()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void setup_binderfs()
{
  if (mkdir("/dev/binderfs", 0777)) {
  }
  if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
  }
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  if (getppid() == 1)
    exit(1);
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static void drop_caps(void)
{
  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    exit(1);
  const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
  cap_data[0].effective &= ~drop;
  cap_data[0].permitted &= ~drop;
  cap_data[0].inheritable &= ~drop;
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    exit(1);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  sandbox_common_mount_tmpfs();
  loop();
  exit(1);
}

uint64_t r[1] = {0xffffffffffffffff};

void loop(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$nl_xfrm arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x6 (4 bytes)
  //  ]
  //  returns sock_nl_xfrm
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/6);
  if (res != -1)
    r[0] = res;
  //  sendmsg$nl_xfrm arguments: [
  //    fd: sock_nl_xfrm (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_xfrm]] {
  //      msghdr_netlink[netlink_msg_xfrm] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_xfrm]] {
  //          iovec[in, netlink_msg_xfrm] {
  //            addr: ptr[in, netlink_msg_xfrm] {
  //              union netlink_msg_xfrm {
  //                newsa: netlink_msg_t[const[XFRM_MSG_NEWSA, int16],
  //                xfrm_usersa_info, xfrma_policy] {
  //                  len: len = 0x150 (4 bytes)
  //                  type: const = 0x10 (2 bytes)
  //                  flags: netlink_msg_flags = 0x1 (2 bytes)
  //                  seq: int32 = 0x0 (4 bytes)
  //                  pid: int32 = 0x0 (4 bytes)
  //                  payload: xfrm_usersa_info {
  //                    sel: xfrm_selector {
  //                      daddr: union xfrm_address_t {
  //                        in: union ipv4_addr {
  //                          loopback: const = 0x7f000001 (4 bytes)
  //                        }
  //                      }
  //                      saddr: union xfrm_address_t {
  //                        in: union ipv4_addr {
  //                          loopback: const = 0x7f000001 (4 bytes)
  //                        }
  //                      }
  //                      dport: int16be = 0x0 (2 bytes)
  //                      dport_mask: int16be = 0x0 (2 bytes)
  //                      sport: int16be = 0x0 (2 bytes)
  //                      sport_mask: int16be = 0x0 (2 bytes)
  //                      family: xfrm_family = 0x2 (2 bytes)
  //                      prefixlen_d: xfrm_prefixlens = 0x20 (1 bytes)
  //                      prefixlen_s: xfrm_prefixlens = 0x20 (1 bytes)
  //                      proto: ipv6_types = 0x0 (1 bytes)
  //                      pad = 0x0 (3 bytes)
  //                      ifindex: ifindex (resource)
  //                      user: uid (resource)
  //                    }
  //                    id: xfrm_id {
  //                      daddr: union xfrm_address_t {
  //                        in: union ipv4_addr {
  //                          loopback: const = 0x7f000001 (4 bytes)
  //                        }
  //                      }
  //                      spi: int32be = 0xbe3412 (4 bytes)
  //                      proto: xfrm_proto = 0x32 (1 bytes)
  //                      pad = 0x0 (3 bytes)
  //                    }
  //                    saddr: union xfrm_address_t {
  //                      in: union ipv4_addr {
  //                        loopback: const = 0x7f000001 (4 bytes)
  //                      }
  //                    }
  //                    lft: xfrm_lifetime_cfg {
  //                      soft_byte_limit: int64 = 0x0 (8 bytes)
  //                      hard_byte_limit: int64 = 0x0 (8 bytes)
  //                      soft_packet_limit: int64 = 0x0 (8 bytes)
  //                      hard_packet_limit: int64 = 0x0 (8 bytes)
  //                      soft_add_expires_seconds: int64 = 0x0 (8 bytes)
  //                      hard_add_expires_seconds: int64 = 0x0 (8 bytes)
  //                      soft_use_expires_seconds: int64 = 0x0 (8 bytes)
  //                      hard_use_expires_seconds: int64 = 0x0 (8 bytes)
  //                    }
  //                    curlft: xfrm_lifetime_cur {
  //                      bytes: int64 = 0x0 (8 bytes)
  //                      packets: int64 = 0x0 (8 bytes)
  //                      add_time: int64 = 0x0 (8 bytes)
  //                      use_time: int64 = 0x0 (8 bytes)
  //                    }
  //                    stats: xfrm_stats {
  //                      replay_window: int32 = 0x0 (4 bytes)
  //                      replay: int32 = 0x0 (4 bytes)
  //                      integrity_failed: int32 = 0x0 (4 bytes)
  //                    }
  //                    seq: int32 = 0x0 (4 bytes)
  //                    reqid: int32 = 0x1 (4 bytes)
  //                    family: xfrm_family = 0x2 (2 bytes)
  //                    mode: xfrm_mode = 0x0 (1 bytes)
  //                    replay_window: int8 = 0x0 (1 bytes)
  //                    flags: xfrm_state = 0x0 (1 bytes)
  //                    pad = 0x0 (7 bytes)
  //                  }
  //                  attrs: array[xfrma_policy] {
  //                    union xfrma_policy {
  //                      algo_aead: nlattr_t[const[XFRMA_ALG_AEAD, int16],
  //                      xfrm_algo_aead] {
  //                        nla_len: offsetof = 0x60 (2 bytes)
  //                        nla_type: const = 0x12 (2 bytes)
  //                        payload: xfrm_algo_aead {
  //                          alg_name: alg_aead_name {
  //                            name: buffer: {72 66 63 34 31 30 36 28 67 63 6d
  //                            28 61 65 73 29 29 00 00 00 00 00 00 00 00 00 00
  //                            00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                            00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                            00 00 00 00 00} (length 0x40)
  //                          }
  //                          alg_key_len: bitsize = 0xa0 (4 bytes)
  //                          alg_icv_len: xfrm_algo_truncbits = 0x60 (4 bytes)
  //                          alg_key: buffer: {21 04 66 d3 85 47 aa 14 0d b9 a2
  //                          00 00 00 00 c5 38 c7 cb 7a} (length 0x14)
  //                        }
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x150 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x2000000003c0 = 0;
  *(uint32_t*)0x2000000003c8 = 0;
  *(uint64_t*)0x2000000003d0 = 0x200000000380;
  *(uint64_t*)0x200000000380 = 0x200000000000;
  *(uint32_t*)0x200000000000 = 0x150;
  *(uint16_t*)0x200000000004 = 0x10;
  *(uint16_t*)0x200000000006 = 1;
  *(uint32_t*)0x200000000008 = 0;
  *(uint32_t*)0x20000000000c = 0;
  *(uint32_t*)0x200000000010 = htobe32(0x7f000001);
  *(uint32_t*)0x200000000020 = htobe32(0x7f000001);
  *(uint16_t*)0x200000000030 = htobe16(0);
  *(uint16_t*)0x200000000032 = htobe16(0);
  *(uint16_t*)0x200000000034 = htobe16(0);
  *(uint16_t*)0x200000000036 = htobe16(0);
  *(uint16_t*)0x200000000038 = 2;
  *(uint8_t*)0x20000000003a = 0x20;
  *(uint8_t*)0x20000000003b = 0x20;
  *(uint8_t*)0x20000000003c = 0;
  *(uint32_t*)0x200000000040 = 0;
  *(uint32_t*)0x200000000044 = 0;
  *(uint32_t*)0x200000000048 = htobe32(0x7f000001);
  *(uint32_t*)0x200000000058 = htobe32(0xbe3412);
  *(uint8_t*)0x20000000005c = 0x32;
  *(uint32_t*)0x200000000060 = htobe32(0x7f000001);
  *(uint64_t*)0x200000000070 = 0;
  *(uint64_t*)0x200000000078 = 0;
  *(uint64_t*)0x200000000080 = 0;
  *(uint64_t*)0x200000000088 = 0;
  *(uint64_t*)0x200000000090 = 0;
  *(uint64_t*)0x200000000098 = 0;
  *(uint64_t*)0x2000000000a0 = 0;
  *(uint64_t*)0x2000000000a8 = 0;
  *(uint64_t*)0x2000000000b0 = 0;
  *(uint64_t*)0x2000000000b8 = 0;
  *(uint64_t*)0x2000000000c0 = 0;
  *(uint64_t*)0x2000000000c8 = 0;
  *(uint32_t*)0x2000000000d0 = 0;
  *(uint32_t*)0x2000000000d4 = 0;
  *(uint32_t*)0x2000000000d8 = 0;
  *(uint32_t*)0x2000000000dc = 0;
  *(uint32_t*)0x2000000000e0 = 1;
  *(uint16_t*)0x2000000000e4 = 2;
  *(uint8_t*)0x2000000000e6 = 0;
  *(uint8_t*)0x2000000000e7 = 0;
  *(uint8_t*)0x2000000000e8 = 0;
  *(uint16_t*)0x2000000000f0 = 0x60;
  *(uint16_t*)0x2000000000f2 = 0x12;
  memcpy((void*)0x2000000000f4,
         "rfc4106(gcm(aes))"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000",
         64);
  *(uint32_t*)0x200000000134 = 0xa0;
  *(uint32_t*)0x200000000138 = 0x60;
  memcpy((void*)0x20000000013c,
         "\x21\x04\x66\xd3\x85\x47\xaa\x14\x0d\xb9\xa2\x00\x00\x00\x00\xc5\x38"
         "\xc7\xcb\x7a",
         20);
  *(uint64_t*)0x200000000388 = 0x150;
  *(uint64_t*)0x2000000003d8 = 1;
  *(uint64_t*)0x2000000003e0 = 0;
  *(uint64_t*)0x2000000003e8 = 0;
  *(uint32_t*)0x2000000003f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x2000000003c0ul, /*f=*/0ul);
  //  sendmsg$nl_xfrm arguments: [
  //    fd: sock_nl_xfrm (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_xfrm]] {
  //      msghdr_netlink[netlink_msg_xfrm] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_xfrm]] {
  //          iovec[in, netlink_msg_xfrm] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {94 00 00 00 29 00 01 00 00 00 00 00 00
  //                  00 00 00 7f 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00
  //                  00 be 34 12 02 00 32 00 7f 00 00 02 00 00 00 00 00 00 00
  //                  00 00 00 00 00 7f 00 00 01 00 00 00 00 00 00 00 00 00 00
  //                  00 00 00 00 00 00 00 00 00 00 7f 00 00 01 00 00 00 00 00
  //                  00 00 00 00 00 00 00 7f 00 00 01 00 00 00 00 00 00 00 00
  //                  00 00 00 00 00 00 00 00 00 00 00 00 02 00 20 20 00 00 00
  //                  00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 02 00
  //                  00 00} (length 0x94)
  //                }
  //              }
  //            }
  //            len: len = 0x94 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000500 = 0;
  *(uint32_t*)0x200000000508 = 0;
  *(uint64_t*)0x200000000510 = 0x200000000400;
  *(uint64_t*)0x200000000400 = 0x200000000000;
  memcpy((void*)0x200000000000,
         "\x94\x00\x00\x00\x29\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x7f"
         "\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xbe"
         "\x34\x12\x02\x00\x32\x00\x7f\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x7f\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x7f\x00\x00\x01\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x7f\x00\x00\x01\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x02\x00\x20\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x01\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00",
         148);
  *(uint64_t*)0x200000000408 = 0x94;
  *(uint64_t*)0x200000000518 = 1;
  *(uint64_t*)0x200000000520 = 0;
  *(uint64_t*)0x200000000528 = 0;
  *(uint32_t*)0x200000000530 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000500ul, /*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;
  do_sandbox_none();
  return 0;
}