re: autofs: add autofs_parse_fd()

The qemu-x86_64 and x86_64 booting with 64bit kernel and 32bit rootfs we call
it as compat mode boot testing. Recently it started to failed to get login
prompt.

We have not seen any kernel crash logs.

Anders, bisection is pointing to first bad commit,
546694b8f658 autofs: add autofs_parse_fd()

Reported-by: Linux Kernel Functional Testing <[email protected]>
Reported-by: Anders Roxell <[email protected]>

steps to reproduce:
----------------
# To install tuxrun to your home directory at ~/.local/bin:
# pip3 install -U --user tuxrun==0.49.2
#
# Or install a deb/rpm depending on the running distribution
# See https://tuxmake.org/install-deb/ or
# https://tuxmake.org/install-rpm/
#
# See https://tuxrun.org/ for complete documentation.
#

tuxrun --runtime podman --device qemu-x86_64 --boot-args rw --kernel
https://storage.tuxsuite.com/public/linaro/lkft/builds/2WyQyyM0OvXnnbI0d84HL0v1J56/bzImage
--modules https://storage.tuxsuite.com/public/linaro/lkft/builds/2WyQyyM0OvXnnbI0d84HL0v1J56/modules.tar.xz
--rootfs https://storage.tuxboot.com/debian/bookworm/i386/rootfs.ext4.xz
--parameters SKIPFILE=skipfile-lkft.yaml --parameters SHARD_NUMBER=10
--parameters SHARD_INDEX=3 --image
docker.io/linaro/tuxrun-dispatcher:v0.49.2 --tests ltp-cve --timeouts
boot=15 --overlay
https://storage.tuxboot.com/overlays/debian/bookworm/i386/ltp/20230929/ltp.tar.xz


Please find related links to test and results comparison.

Links:
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20231019/testrun/20695093/suite/boot/test/gcc-13-lkftconfig-compat/history/?page=1
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230926/testrun/20125035/suite/boot/test/gcc-13-lkftconfig-compat/details/
 - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2WyR2MGbyTalC8rGugHIZXPMldC/reproducer
 - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2WyR2MGbyTalC8rGugHIZXPMldC
--
Linaro LKFT
https://lkft.linaro.org