From 37e95ded40b02cd65f68d2081cb6a5d1593c14d2 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Thu, 14 Jul 2022 12:20:19 +0200 Subject: [PATCH] um: Add missing apply_returns() commit 564d998106397394b6aad260f219b882b3347e62 upstream. Implement apply_returns() stub for UM, just like all the other patching routines. Fixes: 15e67227c49a ("x86: Undo return-thunk damage") Reported-by: Randy Dunlap Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/Ys%2Ft45l%2FgarIrD0u@worktop.programming.kicks-ass.net Signed-off-by: Greg Kroah-Hartman --- arch/um/kernel/um_arch.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 54447690de11..5aa5e7533b75 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -425,6 +425,10 @@ void apply_retpolines(s32 *start, s32 *end) { } +void apply_returns(s32 *start, s32 *end) +{ +} + void apply_alternatives(struct alt_instr *start, struct alt_instr *end) { }