Re: [PATCH 18/48] klp-build: Fix hang on out-of-date .config

[Song Liu]

On Wed, Apr 22, 2026 at 9:04 PM Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote:
>
> If .config is out of date with the kernel source, 'make syncconfig'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@xxxxxxxxxx>
> ---
>  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)"

Do we really need cd "$SRC" here? If so, we need it before
all the make commands, right?

Thanks,
Song

>         [[ -z "$kernelrelease" ]] && die "failed to get kernel version"
>
>         sed -i "2i echo $kernelrelease; exit 0" scripts/setlocalversion
> --
> 2.53.0
>
>