[tip: objtool/urgent] livepatch/klp-build: Fix inconsistent kernel version

[tip-bot2 for Josh Poimboeuf]

The following commit has been merged into the objtool/urgent branch of tip:

Commit-ID:     6f93f7b06810d04acc6b106a7d5ecd6000f80545
Gitweb:        https://git.kernel.org/tip/6f93f7b06810d04acc6b106a7d5ecd6000f80545
Author:        Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
AuthorDate:    Tue, 10 Mar 2026 16:37:48 -04:00
Committer:     Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
CommitterDate: Mon, 16 Mar 2026 12:50:17 -07:00

livepatch/klp-build: Fix inconsistent kernel version

If .config hasn't been synced with auto.conf, any recent changes to
CONFIG_LOCALVERSION* may not get reflected in the kernel version name.

Use "make syncconfig" to force them to sync, and "make -s kernelrelease"
to get the version instead of having to construct it manually.

Fixes: 24ebfcd65a87 ("livepatch/klp-build: Introduce klp-build script for generating livepatch modules")
Closes: https://lore.kernel.org/20260217160645.3434685-10-joe.lawrence@xxxxxxxxxx
Reported-by: Joe Lawrence <joe.lawrence@xxxxxxxxxx>
Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Signed-off-by: Joe Lawrence <joe.lawrence@xxxxxxxxxx>
Acked-by: Song Liu <song@xxxxxxxxxx>
Link: https://patch.msgid.link/20260310203751.1479229-10-joe.lawrence@xxxxxxxxxx
Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
---
 scripts/livepatch/klp-build |  9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/scripts/livepatch/klp-build b/scripts/livepatch/klp-build
index 809e198..7b82c75 100755
--- a/scripts/livepatch/klp-build
+++ b/scripts/livepatch/klp-build
@@ -285,15 +285,14 @@ set_module_name() {
 # application from appending it with '+' due to a dirty git working tree.
 set_kernelversion() {
 	local file="$SRC/scripts/setlocalversion"
-	local localversion
+	local kernelrelease
 
 	stash_file "$file"
 
-	localversion="$(cd "$SRC" && make --no-print-directory kernelversion)"
-	localversion="$(cd "$SRC" && KERNELVERSION="$localversion" ./scripts/setlocalversion)"
-	[[ -z "$localversion" ]] && die "setlocalversion failed"
+	kernelrelease="$(cd "$SRC" && make syncconfig &>/dev/null && make -s kernelrelease)"
+	[[ -z "$kernelrelease" ]] && die "failed to get kernel version"
 
-	sed -i "2i echo $localversion; exit 0" scripts/setlocalversion
+	sed -i "2i echo $kernelrelease; exit 0" scripts/setlocalversion
 }
 
 get_patch_files() {