!49 fix CVE-2021-20269

From: @chenhaixaing 
Reviewed-by: @overweight 
Signed-off-by: @overweight

kdump-lib-initramfs.sh

@@ -164,7 +164,7 @@ save_vmcore_dmesg_fs() {
     _exitcode=$?
     if [ $_exitcode -eq 0 ]; then
         mv ${_path}/vmcore-dmesg-incomplete.txt ${_path}/vmcore-dmesg.txt
-
+	chmod 400 ${_path}/vmcore-dmesg.txt
         # Make sure file is on disk. There have been instances where later
         # saving vmcore failed and system rebooted without sync and there
         # was no vmcore-dmesg.txt available.

kexec-tools.spec

@@ -4,7 +4,7 @@
 
 Name: kexec-tools
 Version: 2.0.23
-Release: 5
+Release: 6
 License: GPLv2
 Summary: The kexec/kdump userspace component
 URL:     https://www.kernel.org/
@@ -288,6 +288,9 @@ done
 %endif
 
 %changelog
+* Wed Aug 3 2022 chenhaixiang <chenhaixiang3@huawei.com> - 2.0.23-6
+- fix CVE-2021-20269
+
 * Fri Mar 11 2022 wangbin <wangbin224@huawei.com> - 2.0.23-5
 - packing 98-kexec.rules instead of 98-kexec.rules.ppc64