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dracut/SOURCES/0047.patch

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From 28cadd4829118d2831908dd267766613fd74f0b1 Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Wed, 12 Jul 2023 03:50:47 -0400
Subject: [PATCH] feat(dracut): add --sbat option to add sbat policy to UKI
Take existing .sbat section from the uefi stub and merge it
with vmlinux .sbat (if it exists) and user-provided .sbat parameters
using the new --sbat option.
For some reasons, --update-section in objcopy does not resize the
.sbat section, so remove the section from the stub and add it
to the UKI as new one, to avoid having incomplete SBAT strings.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
(Cherry-picked commit: 550a0084fd95870f35218dc2cf8ea91fde1c728a)
Resolves: RHEL-5732
---
dracut.sh | 46 +++++++++++++++++++++++++++++++++++++++++++-
man/dracut.8.asc | 5 +++++
man/dracut.conf.5.asc | 5 +++++
shell-completion/bash/dracut | 2 +-
4 files changed, 56 insertions(+), 2 deletions(-)
diff --git a/dracut.sh b/dracut.sh
index 8c757b14..0bac6a33 100755
--- a/dracut.sh
+++ b/dracut.sh
@@ -271,6 +271,10 @@ Creates initial ramdisk images for preloading modules
Use [FILE] as a splash image when creating an UEFI
executable. Requires bitmap (.bmp) image format.
--kernel-image [FILE] Location of the kernel image.
+ --sbat [PARAMETERS] The SBAT parameters to be added to .sbat.
+ The string "sbat,1,SBAT Version,sbat,1,
+ https://github.com/rhboot/shim/blob/main/SBAT.md" is
+ already added by default.
--regenerate-all Regenerate all initramfs images at the default location
for the kernel versions found on the system.
-p, --parallel Use parallel processing if possible (currently only
@@ -462,6 +466,7 @@ rearrange_params() {
--long uefi-stub: \
--long uefi-splash-image: \
--long kernel-image: \
+ --long sbat: \
--long no-hostonly-i18n \
--long hostonly-i18n \
--long hostonly-nics: \
@@ -839,6 +844,11 @@ while :; do
PARMS_TO_STORE+=" '$2'"
shift
;;
+ --sbat)
+ sbat_l="$2"
+ PARMS_TO_STORE+=" '$2'"
+ shift
+ ;;
--no-machineid)
machine_id_l="no"
;;
@@ -1076,6 +1086,7 @@ stdloglvl=$((stdloglvl + verbosity_mod_l))
[[ $uefi_stub_l ]] && uefi_stub="$uefi_stub_l"
[[ $uefi_splash_image_l ]] && uefi_splash_image="$uefi_splash_image_l"
[[ $kernel_image_l ]] && kernel_image="$kernel_image_l"
+[[ $sbat_l ]] && sbat="$sbat_l"
[[ $machine_id_l ]] && machine_id="$machine_id_l"
if ! [[ $outfile ]]; then
@@ -2585,6 +2596,24 @@ fi
umask 077
+SBAT_DEFAULT="sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md"
+sbat_out=$uefi_outdir/uki.sbat
+
+clean_sbat_string() {
+ local inp=$1
+ local temp=$uefi_outdir/temp.sbat
+ sed "/${SBAT_DEFAULT//\//\\/}/d" "$inp" > "$temp"
+ [[ -s $temp ]] && cat "$temp" >> "$sbat_out"
+ rm "$temp"
+}
+
+get_sbat_string() {
+ local inp=$1
+ local out=$uefi_outdir/$2
+ objcopy -O binary --only-section=.sbat "$inp" "$out"
+ clean_sbat_string "$out"
+}
+
if [[ $uefi == yes ]]; then
if [[ $kernel_cmdline ]]; then
echo -n "$kernel_cmdline" > "$uefi_outdir/cmdline.txt"
@@ -2635,6 +2664,16 @@ if [[ $uefi == yes ]]; then
unset uefi_splash_image
fi
+ echo "$SBAT_DEFAULT" > "$sbat_out"
+ if [[ -n $sbat ]]; then
+ echo "$sbat" | sed "/${SBAT_DEFAULT//\//\\/}/d" >> "$sbat_out"
+ fi
+ get_sbat_string "$kernel_image" kernel.sbat
+ get_sbat_string "$uefi_stub" stub.sbat
+
+ uefi_sbat_offs="${offs}"
+ offs=$((offs + $(stat -Lc%s "$sbat_out")))
+ offs=$((offs + "$align" - offs % "$align"))
uefi_linux_offs="${offs}"
offs=$((offs + $(stat -Lc%s "$kernel_image")))
offs=$((offs + "$align" - offs % "$align"))
@@ -2646,14 +2685,19 @@ if [[ $uefi == yes ]]; then
exit 1
fi
+ tmp_uefi_stub=$uefi_outdir/elf.stub
+ cp "$uefi_stub" "$tmp_uefi_stub"
+ objcopy --remove-section .sbat "$tmp_uefi_stub" &> /dev/null
+
if objcopy \
${uefi_osrelease:+--add-section .osrel="$uefi_osrelease" --change-section-vma .osrel=$(printf 0x%x "$uefi_osrelease_offs")} \
${uefi_cmdline:+--add-section .cmdline="$uefi_cmdline" --change-section-vma .cmdline=$(printf 0x%x "$uefi_cmdline_offs")} \
${uefi_splash_image:+--add-section .splash="$uefi_splash_image" --change-section-vma .splash=$(printf 0x%x "$uefi_splash_offs")} \
+ --add-section .sbat="$sbat_out" --change-section-vma .sbat="$(printf 0x%x "$uefi_sbat_offs")" \
--add-section .linux="$kernel_image" --change-section-vma .linux="$(printf 0x%x "$uefi_linux_offs")" \
--add-section .initrd="${DRACUT_TMPDIR}/initramfs.img" --change-section-vma .initrd="$(printf 0x%x "$uefi_initrd_offs")" \
--image-base="$(printf 0x%x "$base_image")" \
- "$uefi_stub" "${uefi_outdir}/linux.efi"; then
+ "$tmp_uefi_stub" "${uefi_outdir}/linux.efi"; then
if [[ -n ${uefi_secureboot_key} && -n ${uefi_secureboot_cert} ]]; then
if sbsign \
--key "${uefi_secureboot_key}" \
diff --git a/man/dracut.8.asc b/man/dracut.8.asc
index bfb86f5d..8339e8a9 100644
--- a/man/dracut.8.asc
+++ b/man/dracut.8.asc
@@ -600,6 +600,11 @@ and no /etc/cmdline/*.conf will be generated into the initramfs.
default is _/lib/modules/<KERNEL-VERSION>/vmlinuz_ or
_/boot/vmlinuz-<KERNEL-VERSION>_.
+**--sbat <parameters>**::
+ Specifies the SBAT parameters, which to include in the UEFI executable. By default
+ the default SBAT string added is "sbat,1,SBAT Version,sbat,1,
+ https://github.com/rhboot/shim/blob/main/SBAT.md".
+
**--enhanced-cpio**::
Attempt to use the dracut-cpio binary, which optimizes archive creation for
copy-on-write filesystems by using the copy_file_range(2) syscall via Rust's
diff --git a/man/dracut.conf.5.asc b/man/dracut.conf.5.asc
index 96c80129..132ca8e3 100644
--- a/man/dracut.conf.5.asc
+++ b/man/dracut.conf.5.asc
@@ -299,6 +299,11 @@ Logging levels:
default is _/lib/modules/<KERNEL-VERSION>/vmlinuz_ or
_/boot/vmlinuz-<KERNEL-VERSION>_.
+*sbat=*"__parameters__"::
+ Specifies the SBAT parameters, which to include in the UEFI executable. By default
+ the default SBAT string added is "sbat,1,SBAT Version,sbat,1,
+ https://github.com/rhboot/shim/blob/main/SBAT.md".
+
*enhanced_cpio=*"__{yes|no}__"::
Attempt to use the dracut-cpio binary, which optimizes archive creation for
copy-on-write filesystems (default=no).
diff --git a/shell-completion/bash/dracut b/shell-completion/bash/dracut
index 86de2071..9b51db01 100644
--- a/shell-completion/bash/dracut
+++ b/shell-completion/bash/dracut
@@ -46,7 +46,7 @@ _dracut() {
--kernel-cmdline --sshkey --persistent-policy --install-optional
--loginstall --uefi-stub --kernel-image --squash-compressor
--sysroot --hostonly-mode --hostonly-nics --include --logfile
- --uefi-splash-image
+ --uefi-splash-image --sbat
'
)
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