fix copying of console kernel cmdline parameters
Resolves: RHEL-26827
This commit is contained in:
Lukáš Zaoral
Pavel Cahyna
parent
72ecb4a663
commit
b220fa1543
@ -1,3 +1,118 @@
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commit 88f11d19d748fff3f36357ef1471ee75fbfacabb
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Merge: bca0e7a9 4b4efc58
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Author: Johannes Meixner <jsmeix@suse.com>
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Date: Wed Aug 3 15:04:20 2022 +0200
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Merge pull request #2844 from rear/jsmeix-overhauled-290_kernel_cmdline
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Overhauled rescue/GNU/Linux/290_kernel_cmdline.sh
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in particular to make it possible to add several already existing
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kernel options by this script with same kernel option keyword
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for example when /proc/cmdline contains
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... console=ttyS0,9600 ... console=tty0 ...
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then via COPY_KERNEL_PARAMETERS+=( console )
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cf. https://github.com/rear/rear/pull/2749#issuecomment-1197843273
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Cherry-picked-by: Lukáš Zaoral <lzaoral@redhat.com>
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diff --git a/usr/share/rear/rescue/GNU/Linux/290_kernel_cmdline.sh b/usr/share/rear/rescue/GNU/Linux/290_kernel_cmdline.sh
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index 0e11204b..eb6c45de 100644
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--- a/usr/share/rear/rescue/GNU/Linux/290_kernel_cmdline.sh
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+++ b/usr/share/rear/rescue/GNU/Linux/290_kernel_cmdline.sh
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@@ -1,8 +1,15 @@
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-# purpose of the script is to detect some important KERNEL CMDLINE options on the current system
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-# we should also use in rescue mode (automatically update KERNEL_CMDLINE array variable).
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+# Purpose of the script is to get the COPY_KERNEL_PARAMETERS on the current system
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+# to be used in the rescue/recovery system via automated update of KERNEL_CMDLINE.
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-# Scanning current kernel cmdline to look for important option ($COPY_KERNEL_PARAMETERS) to include in KERNEL_CMDLINE
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-for current_kernel_option in $( cat /proc/cmdline ); do
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+# Also protect the rescue/recovery system by removing net.ifnames=0 from KERNEL_CMDLINE
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+# if net.ifnames=0 is in KERNEL_CMDLINE but persistent network interface naming is used:
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+local persistent_naming='no'
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+is_persistent_ethernet_name $( ip route | awk '$2 == "dev" && $8 == "src" { print $3 }' | sort -u | head -n1 ) && persistent_naming='yes'
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+
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+# Scan current kernel cmdline for options in COPY_KERNEL_PARAMETERS to be included in KERNEL_CMDLINE:
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+local current_kernel_option
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+local new_kernel_options_to_add=()
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+for current_kernel_option in $( cat /proc/cmdline ) ; do
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# Get the current kernel option name (part before leftmost "=") and
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# add the whole option (with value) to new_kernel_options_to_add array
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# if the option name is part of COPY_KERNEL_PARAMETERS array:
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@@ -11,41 +18,45 @@ for current_kernel_option in $( cat /proc/cmdline ); do
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fi
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done
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-# Verify if the kernel option we want to add to KERNEL_CMDLINE are not already set/force by the user in the rear configuration.
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-# If yes, the parameter set in the configuration file have the priority and superseed the current kernel option.
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+# Check if the kernel options we want to add to KERNEL_CMDLINE are already set by the user in KERNEL_CMDLINE.
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+# If yes, the user setting has priority and superseds the kernel option from the current system.
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+# For the check use the existing KERNEL_CMDLINE when this script is started
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+# and not the modified KERNEL_CMDLINE with already added kernel options
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+# to make it possible to add several kernel options by this script
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+# with same kernel option keyword like console=ttyS0,9600 console=tty0
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+# see https://github.com/rear/rear/pull/2749#issuecomment-1197843273
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+# and https://github.com/rear/rear/pull/2844
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+local existing_kernel_cmdline="$KERNEL_CMDLINE"
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+local existing_kernel_option new_kernel_option new_kernel_option_keyword
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for new_kernel_option in "${new_kernel_options_to_add[@]}" ; do
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new_kernel_option_keyword="${new_kernel_option%%=*}"
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-
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- for rear_kernel_option in $KERNEL_CMDLINE ; do
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- # Check if a kernel option key without value parameter (everything before =) is not already present in rear KERNEL_CMDLINE array.
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- if test "$new_kernel_option_keyword" = "${rear_kernel_option%%=*}" ; then
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- Log "Current kernel option [$new_kernel_option] supperseeded by [$rear_kernel_option] in your rear configuration: (KERNEL_CMDLINE)"
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+ for existing_kernel_option in $existing_kernel_cmdline ; do
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+ if test "$new_kernel_option_keyword" = "${existing_kernel_option%%=*}" ; then
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+ LogPrint "Not adding '$new_kernel_option' (superseded by existing '$existing_kernel_option' in KERNEL_CMDLINE)"
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# Continue with the next new_kernel_option (i.e. continue the outer 'for' loop):
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continue 2
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fi
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done
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-
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+ # If we are using persistent naming do not add net.ifnames to KERNEL_CMDLINE
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+ # see https://github.com/rear/rear/pull/1874
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+ # and continue with the next new_kernel_option:
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if test "net.ifnames" = "$new_kernel_option_keyword" ; then
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- # If we are using persistent naming do not add net.ifnames to KERNEL_CMDLINE
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- # see https://github.com/rear/rear/pull/1874
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- # and continue with the next new_kernel_option:
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- is_persistent_ethernet_name $( ip r | awk '$2 == "dev" && $8 == "src" { print $3 }' | sort -u | head -1 ) && continue
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+ if is_true $persistent_naming ; then
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+ LogPrint "Not adding '$new_kernel_option' (persistent network interface naming is used)"
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+ continue
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+ fi
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fi
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-
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- LogPrint "Adding $new_kernel_option to KERNEL_CMDLINE"
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- KERNEL_CMDLINE="$KERNEL_CMDLINE $new_kernel_option"
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+ LogPrint "Adding '$new_kernel_option' to KERNEL_CMDLINE"
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+ KERNEL_CMDLINE+=" $new_kernel_option"
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done
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-# In case we added 'KERNEL_CMDLINE="$KERNEL_CMDLINE net.ifnames=0"' to /etc/rear/local.conf, but we have no idea if we
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-# are using persistent naming or not then we should protect the rescue image from doing stupid things and remove
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-# the keyword (and value) in a preventive way in case "persistent naming is in use".
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-# And, to be clear the /proc/cmdline did not contain the keyword net.ifnames
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-
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-if is_persistent_ethernet_name $( ip r | awk '$2 == "dev" && $8 == "src" { print $3 }' | sort -u | head -1 ) ; then
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- # persistent naming is in use
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- # When the KERNEL_CMDLINE does NOT contain net.ifnames=0 silently return
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- echo $KERNEL_CMDLINE | grep -q 'net.ifnames=0' || return
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- # Remove net.ifnames=0 from KERNEL_CMDLINE
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- KERNEL_CMDLINE=$( echo $KERNEL_CMDLINE | sed -e 's/net.ifnames=0//' )
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- LogPrint "Removing net.ifnames=0 from KERNEL_CMDLINE"
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+# The user may have added 'net.ifnames=0' to KERNEL_CMDLINE in /etc/rear/local.conf
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+# but he may not know whether or not persistent naming is used.
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+# So we should protect the rescue/recovery system from doing "stupid things"
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+# and remove 'net.ifnames=0' in a preventive way when persistent naming is used:
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+if is_true $persistent_naming ; then
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+ if echo $KERNEL_CMDLINE | grep -q 'net.ifnames=0' ; then
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+ KERNEL_CMDLINE=$( echo $KERNEL_CMDLINE | sed -e 's/net.ifnames=0//' )
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+ LogPrint "Removed 'net.ifnames=0' from KERNEL_CMDLINE (persistent network interface naming is used)"
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+ fi
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fi
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commit 42e04f36f5f8eea0017915bb35e56ee285b394d7
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Merge: 7c6296db 940fede7
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Author: Johannes Meixner <jsmeix@suse.com>
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@ -3,7 +3,7 @@
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Name: rear
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Version: 2.7
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Release: 9%{?dist}
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Release: 10%{?dist}
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Summary: Relax-and-Recover is a Linux disaster recovery and system migration tool
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URL: https://relax-and-recover.org
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License: GPL-3.0-only
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@ -62,6 +62,7 @@ Patch110: rear-fix-compatibility-with-newer-systemd-bz2254871.patch
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Patch111: rear-CVE-2024-23301.patch
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# copy the console= kernel arguments from the original system
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# https://github.com/rear/rear/commit/88f11d19d748fff3f36357ef1471ee75fbfacabb
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# https://github.com/rear/rear/commit/42e04f36f5f8eea0017915bb35e56ee285b394d7
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# https://github.com/rear/rear/commit/07da02143b5597b202e66c187e53103561018255
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Patch112: rear-copy-console-kernel-cmdline-from-host.patch
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@ -226,6 +227,9 @@ EOF
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#-- CHANGELOG -----------------------------------------------------------------#
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%changelog
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* Mon Aug 05 2024 Lukáš Zaoral <lzaoral@redhat.com> - 2.7-10
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- fix copying of console kernel cmdline parameters
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* Mon Jun 24 2024 Troy Dawson <tdawson@redhat.com> - 2.7-9
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- Bump release for June 2024 mass rebuild
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