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mkdumprd: call dracut with --add-device to install the drivers needed by /boot partition automatically for FIPS

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Currently, kdump doesn't work on many FIPS-enabled systems including
Azure, ESXI, Hyper, POWER and etc. When FIPS is enabled, it needs to
access /boot//.vmlinuz-xxx.hmac to verify the integrity of the kernel.
However, on those systems, /boot fails to be mounted due to a lack of
fs and block device drivers and the system just halted after failing to
verify the integrity of the kernel. For example, on Hyper-V, sd_mod, sg,
scsi_transport_fc, hv_storvsc and hv_vmbus need to be installed in order
for /boot to be mounted.

mkdumprd calls dracut with the --no-hostonly-default-device. Following
the documentation (man dracut),
    --no-hostonly-default-device
      Do not generate implicit host devices like root, swap, fstab, etc.
      Use "--mount" or "--add-device" to explicitly add devices as needed

this patch uses "--add-device" to explicitly add the device of /boot.

Note there is already an attempt to fix it in dracut's 01fips module
i.e. via the commit 83651776 ("fips: ensure fs module for /boot is
installed"). Unfortunately it only installs the file system driver e.g.
xfs.

Reviewed-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
This commit is contained in:
Coiby Xu 2023-05-24 12:01:45 +08:00
parent 81d3cc344d
commit 443a43e075
1 changed files with 4 additions and 0 deletions
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mkdumprd
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@ -463,6 +463,10 @@ if ! is_fadump_capable; then
is_dump_to_rootfs && add_mount "$(to_dev_name "$(get_root_fs_device)")" is_dump_to_rootfs && add_mount "$(to_dev_name "$(get_root_fs_device)")"
add_dracut_arg "--no-hostonly-default-device" add_dracut_arg "--no-hostonly-default-device"
if fips-mode-setup --is-enabled 2 > /dev/null; then
add_dracut_arg --add-device "$(findmnt -n -o SOURCE --target /boot)"
fi
fi fi
dracut "${dracut_args[@]}" "$@" dracut "${dracut_args[@]}" "$@"