diff options
| author | Samuel Holland <[email protected]> | 2024-01-22 09:52:01 -0800 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-01-25 23:52:21 -0800 |
| commit | 6f9dc684cae638dda0570154509884ee78d0f75c (patch) | |
| tree | beee30649ca24a4e5cb2830989cc539c5dddc4d8 | |
| parent | e4e3df290f65da6cb27dac1309389c916f27db1a (diff) | |
scs: add CONFIG_MMU dependency for vfree_atomic()
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/[email protected]
Fixes: a2abe7cbd8fe ("scs: switch to vmapped shadow stacks")
Signed-off-by: Samuel Holland <[email protected]>
Reviewed-by: Sami Tolvanen <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
| -rw-r--r-- | arch/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index c91917b50873..a5af0edd3eb8 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -673,6 +673,7 @@ config SHADOW_CALL_STACK bool "Shadow Call Stack" depends on ARCH_SUPPORTS_SHADOW_CALL_STACK depends on DYNAMIC_FTRACE_WITH_ARGS || DYNAMIC_FTRACE_WITH_REGS || !FUNCTION_GRAPH_TRACER + depends on MMU help This option enables the compiler's Shadow Call Stack, which uses a shadow stack to protect function return addresses from |