// https://syzkaller.appspot.com/bug?id=7b1188e36d188e8dccdbcc72e0600e00d585cfa3
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <sched.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#include <linux/sched.h>

#ifndef __NR_clone3
#define __NR_clone3 435
#endif

#define USLEEP_FORKED_CHILD (3 * 50 * 1000)

static long handle_clone_ret(long ret)
{
  if (ret != 0) {
    return ret;
  }
  usleep(USLEEP_FORKED_CHILD);
  syscall(__NR_exit, 0);
  while (1) {
  }
}

#define MAX_CLONE_ARGS_BYTES 256
static long syz_clone3(volatile long a0, volatile long a1)
{
  unsigned long copy_size = a1;
  if (copy_size < sizeof(uint64_t) || copy_size > MAX_CLONE_ARGS_BYTES)
    return -1;
  char clone_args[MAX_CLONE_ARGS_BYTES];
  memcpy(&clone_args, (void*)a0, copy_size);
  uint64_t* flags = (uint64_t*)&clone_args;
  *flags &= ~CLONE_VM;
  return handle_clone_ret((long)syscall(__NR_clone3, &clone_args, copy_size));
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

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;
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$pppl2tp arguments: [
  //    domain: const = 0x18 (8 bytes)
  //    type: const = 0x1 (8 bytes)
  //    proto: const = 0x1 (4 bytes)
  //  ]
  //  returns sock_pppl2tp
  res = syscall(__NR_socket, /*domain=*/0x18ul, /*type=*/1ul, /*proto=*/1);
  if (res != -1)
    r[0] = res;
  //  socket$inet6_udp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: const = 0x2 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_udp6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=*/2ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  connect$pppl2tp arguments: [
  //    fd: sock_pppl2tp (resource)
  //    addr: ptr[in, sockaddr_pppl2tp] {
  //      union sockaddr_pppl2tp {
  //        pppol2tpin6: sockaddr_pppl2tp_t[pppol2tpin6_addr] {
  //          sa_family: const = 0x18 (2 bytes)
  //          sa_protocol: const = 0x1 (4 bytes)
  //          addr: pppol2tpin6_addr_t[int16] {
  //            pid: const = 0x0 (4 bytes)
  //            fd: sock (resource)
  //            s_tunnel: int16 = 0x8 (2 bytes)
  //            s_session: int16 = 0x0 (2 bytes)
  //            d_tunnel: int16 = 0x0 (2 bytes)
  //            d_session: int16 = 0x0 (2 bytes)
  //            addr: sockaddr_in6 {
  //              family: const = 0xa (2 bytes)
  //              port: int16be = 0x0 (2 bytes)
  //              flow: int32be = 0x0 (4 bytes)
  //              addr: union ipv6_addr {
  //                rand_addr: buffer: {20 01 00 00 00 00 00 00 00 00 00 00 00
  //                00 00 02} (length 0x10)
  //              }
  //              scope: int32 = 0x0 (4 bytes)
  //            }
  //          }
  //        }
  //      }
  //    }
  //    addrlen: len = 0x32 (8 bytes)
  //  ]
  *(uint16_t*)0x200000000240 = 0x18;
  *(uint32_t*)0x200000000242 = 1;
  *(uint32_t*)0x200000000246 = 0;
  *(uint32_t*)0x20000000024a = r[1];
  *(uint16_t*)0x20000000024e = 8;
  *(uint16_t*)0x200000000250 = 0;
  *(uint16_t*)0x200000000252 = 0;
  *(uint16_t*)0x200000000254 = 0;
  *(uint16_t*)0x200000000256 = 0xa;
  *(uint16_t*)0x200000000258 = htobe16(0);
  *(uint32_t*)0x20000000025a = htobe32(0);
  memcpy((void*)0x20000000025e,
         " \001\000\000\000\000\000\000\000\000\000\000\000\000\000\002", 16);
  *(uint32_t*)0x20000000026e = 0;
  syscall(__NR_connect, /*fd=*/r[0], /*addr=*/0x200000000240ul,
          /*addrlen=*/0x32ul);
  //  sendfile arguments: [
  //    fdout: fd (resource)
  //    fdin: fd (resource)
  //    off: ptr[inout, intptr] {
  //      intptr = 0x3 (8 bytes)
  //    }
  //    count: intptr = 0xac5 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000040 = 3;
  syscall(__NR_sendfile, /*fdout=*/(intptr_t)-1, /*fdin=*/(intptr_t)-1,
          /*off=*/0x200000000040ul, /*count=*/0xac5ul);
  //  syz_clone3 arguments: [
  //    args: ptr[in, clone_args] {
  //      clone_args {
  //        flags: clone3_flags = 0x23800000 (8 bytes)
  //        pidfd: ptr[out, fd_pidfd] {
  //          fd_pidfd (resource)
  //        }
  //        child_tid: nil
  //        parent_tid: nil
  //        exit_signal: align64[signalno] {
  //          v: int32 = 0x27 (4 bytes)
  //          pad = 0x0 (4 bytes)
  //        }
  //        stack: nil
  //        stack_size: bytesize = 0x0 (8 bytes)
  //        tls: nil
  //        set_tid: nil
  //        set_tid_size: len = 0x0 (8 bytes)
  //        cgroup: align64[fd_cgroup] {
  //          v: fd_cgroup (resource)
  //          pad = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: bytesize = 0x58 (8 bytes)
  //  ]
  //  returns pid
  *(uint64_t*)0x200000000900 = 0x23800000;
  *(uint64_t*)0x200000000908 = 0x200000000040;
  *(uint64_t*)0x200000000910 = 0;
  *(uint64_t*)0x200000000918 = 0;
  *(uint32_t*)0x200000000920 = 0x27;
  *(uint64_t*)0x200000000928 = 0;
  *(uint64_t*)0x200000000930 = 0;
  *(uint64_t*)0x200000000938 = 0;
  *(uint64_t*)0x200000000940 = 0;
  *(uint64_t*)0x200000000948 = 0;
  *(uint32_t*)0x200000000950 = -1;
  res = -1;
  res = syz_clone3(/*args=*/0x200000000900, /*size=*/0x58);
  if (res != -1)
    r[2] = *(uint32_t*)0x200000000040;
  //  ioctl$EXT4_IOC_GETFSUUID arguments: [
  //    fd: fd (resource)
  //    cmd: const = 0x80487436 (4 bytes)
  //    arg: nil
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x80487436, /*arg=*/0ul);
  return 0;
}