Building with CONFIG_KASAN=y when neither KASAN_GENERIC nor KASAN_SW_TAGS
can be selected leads to a build error:
arch/arm64/mm/kasan_init.c: In function 'kasan_pte_populate':
arch/arm64/mm/kasan_init.c:106:28: error: 'KASAN_SHADOW_INIT' undeclared (first
use in this function); did you mean 'KASAN_SHADOW_END'?
We should really only allow enabling KASAN when all its dependencies
are met as it was before the introduction of CONFIG_KASAN_SW_TAGS.
Fixes: b8440cc16515 ("kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS")
Signed-off-by: Arnd Bergmann <[email protected]>
---
lib/Kconfig.kasan | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index b5d0cbfce4a1..83286bca2f70 100644
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan
@@ -15,6 +15,8 @@ if HAVE_ARCH_KASAN
config KASAN
bool "KASAN: runtime memory debugger"
+ depends on CC_HAS_KASAN_GENERIC || CC_HAS_KASAN_SW_TAGS
+ depends on (SLUB && SYSFS) || (SLAB && !DEBUG_SLAB)
help
Enables KASAN (KernelAddressSANitizer) - runtime memory debugger,
designed to find out-of-bounds accesses and use-after-free bugs.
--
2.20.0
