[PATCH 18/48] klp-build: Fix hang on out-of-date .config

Josh Poimboeuf
2026-04-23T04:04:32Z

If .config is out of date with the kernel source, 'make syncconfig'
hangs while waiting for user input on new config options. Detect the
mismatch and return an error.

Fixes: 6f93f7b06810 ("livepatch/klp-build: Fix inconsistent kernel version")
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
scripts/livepatch/klp-build | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/livepatch/klp-build b/scripts/livepatch/klp-build
index 0ad7e6631314..81b35fc10877 100755
--- a/scripts/livepatch/klp-build
+++ b/scripts/livepatch/klp-build
@@ -306,7 +306,12 @@ set_kernelversion() {

stash_file "$file"

- kernelrelease="$(cd "$SRC" && make syncconfig &>/dev/null && make -s kernelrelease)"
+ if [[ -n "$(make -s listnewconfig 2>/dev/null)" ]]; then
+ die ".config mismatch, check your .config or run 'make olddefconfig'"
+ fi
+ make syncconfig &>/dev/null || die "make syncconfig failed"
+
+ kernelrelease="$(cd "$SRC" && make -s kernelrelease)"
[[ -z "$kernelrelease" ]] && die "failed to get kernel version"

sed -i "2i echo $kernelrelease; exit 0" scripts/setlocalversion
--
2.53.0