From: Peter Zijlstra peterz@infradead.org
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 <rdunlap@infradead.org) Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Signed-off-by: Borislav Petkov bp@suse.de Link: https://lore.kernel.org/r/Ys%2Ft45l%2FgarIrD0u@worktop.programming.kicks-ass... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/um/kernel/um_arch.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -425,6 +425,10 @@ void apply_retpolines(s32 *start, s32 *e { }
+void apply_returns(s32 *start, s32 *end) +{ +} + void apply_alternatives(struct alt_instr *start, struct alt_instr *end) { }