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um: Add missing apply_returns()
author
Peter Zijlstra
<peterz@infradead.org>
Thu, 14 Jul 2022 10:20:19 +0000
(12:20 +0200)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Sat, 23 Jul 2022 10:54:14 +0000
(12:54 +0200)
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.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/um/kernel/um_arch.c
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diff --git
a/arch/um/kernel/um_arch.c
b/arch/um/kernel/um_arch.c
index
5444769
..
5aa5e75
100644
(file)
--- 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)
{
}