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

Commit-ID:     df0d7bb04a27e48a0fb5fd32223f5ab248876cab
Gitweb:        https://git.kernel.org/tip/df0d7bb04a27e48a0fb5fd32223f5ab248876cab
Author:        Josh Poimboeuf <jpoimboe@kernel.org>
AuthorDate:    Sun, 19 Apr 2026 19:57:48 -07:00
Committer:     Josh Poimboeuf <jpoimboe@kernel.org>
CommitterDate: Mon, 04 May 2026 21:16:03 -07:00

klp-build: Reject patches to realmode

Realmode code is compiled as a separate 16-bit binary and embedded into
the kernel image via rmpiggy.S.  It can't be livepatched.

Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
 scripts/livepatch/klp-build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/livepatch/klp-build b/scripts/livepatch/klp-build
index a70d48d..2bb35de 100755
--- a/scripts/livepatch/klp-build
+++ b/scripts/livepatch/klp-build
@@ -357,7 +357,7 @@ check_unsupported_patches() {
 
 		for file in "${files[@]}"; do
 			case "$file" in
-				lib/*|*/vdso/*|*.S)
+				lib/*|*/vdso/*|*/realmode/rm/*|*.S)
 					die "${patch}: unsupported patch to $file"
 					;;
 			esac