This is a note to let you know that I've just added the patch titled
scs: add CONFIG_MMU dependency for vfree_atomic()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scs-add-config_mmu-dependency-for-vfree_atomic.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6f9dc684cae638dda0570154509884ee78d0f75c Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel.holland@xxxxxxxxxx>
Date: Mon, 22 Jan 2024 09:52:01 -0800
Subject: scs: add CONFIG_MMU dependency for vfree_atomic()
From: Samuel Holland <samuel.holland@xxxxxxxxxx>
commit 6f9dc684cae638dda0570154509884ee78d0f75c upstream.
The shadow call stack implementation fails to build without CONFIG_MMU:
ld.lld: error: undefined symbol: vfree_atomic
>>> referenced by scs.c
>>> kernel/scs.o:(scs_free) in archive vmlinux.a
Link: https://lkml.kernel.org/r/20240122175204.2371009-1-samuel.holland@xxxxxxxxxx
Fixes: a2abe7cbd8fe ("scs: switch to vmapped shadow stacks")
Signed-off-by: Samuel Holland <samuel.holland@xxxxxxxxxx>
Reviewed-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -605,6 +605,7 @@ config SHADOW_CALL_STACK
bool "Clang Shadow Call Stack"
depends on CC_IS_CLANG && ARCH_SUPPORTS_SHADOW_CALL_STACK
depends on DYNAMIC_FTRACE_WITH_REGS || !FUNCTION_GRAPH_TRACER
+ depends on MMU
help
This option enables Clang's Shadow Call Stack, which uses a
shadow stack to protect function return addresses from being
Patches currently in stable-queue which might be from samuel.holland@xxxxxxxxxx are
queue-5.15/scs-add-config_mmu-dependency-for-vfree_atomic.patch
