check_caveats, reload_microcode, update_ucode: reset locale to C

The scripts are not expected to work with locale-sensitive data,
and since unusual locales may let them go haywire, try to avoid
it by forcing locale to C at the beginning of the scripts.

* check_caveats: Export LC_ALL=C.
* reload_microcode: Likewise.
* update_ucode: Likewise.
* microcode_ctl.spec (Release): Bump to 3.
(%changelog): Mention it.

Resolves: #2218104
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>

check_caveats

@@ -5,6 +5,8 @@
 #
 # SPDX-License-Identifier: CC0-1.0
 
+export LC_ALL=C
+
 : ${MC_CAVEATS_DATA_DIR=/usr/share/microcode_ctl/ucode_with_caveats}
 : ${FW_DIR=/lib/firmware}
 : ${CFG_DIR=/etc/microcode_ctl/ucode_with_caveats}

microcode_ctl.spec

@@ -12,7 +12,7 @@
 Summary:        CPU microcode updates for Intel x86 processors
 Name:           microcode_ctl
 Version:        %{intel_ucode_version}
-Release:        2%{?dist}
+Release:        3%{?dist}
 Epoch:          4
 License:        CC0 and Redistributable, no modification permitted
 URL:            https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files
@@ -545,6 +545,10 @@ rm -rf %{buildroot}
 
 
 %changelog
+* Wed Jun 28 2023 Eugene Syromiatnikov <esyr@redhat.com> - 4:20230214-3
+- Force locale to C in check_caveats, reload_microcode, and update_ucode
+  (#2218104).
+
 * Tue Jun 06 2023 Eugene Syromiatnikov <esyr@redhat.com> - 4:20230214-2
 - Cleanup the dangling symlinks in update_ucode (#2213022).
 

reload_microcode

@@ -5,6 +5,8 @@
 #
 # SPDX-License-Identifier: CC0-1.0
 
+export LC_ALL=C
+
 CHECK_CAVEATS=/usr/libexec/microcode_ctl/check_caveats
 IGNORE_HYPERVISOR="/etc/microcode_ctl/ignore-hypervisor-flag"
 

update_ucode

@@ -5,6 +5,8 @@
 #
 # SPDX-License-Identifier: CC0-1.0
 
+export LC_ALL=C
+
 usage()
 {
 	echo "Usage: update_ucode [--action {add|remove|refresh|list}]" \