[PATCH master] ARM: kasan: reserve shadow memory region

[Ahmad Fatoum]

We did not have any protection in place to ensure that KASAN shadow memory
isn't overwritten during boot. Add that now to avoid strange effects
during debugging.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 arch/arm/cpu/start.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
index 15f5b2937227..9f4cdfe67fbf 100644
--- a/arch/arm/cpu/start.c
+++ b/arch/arm/cpu/start.c
@@ -133,6 +133,10 @@ static int barebox_memory_areas_init(void)
 		request_sdram_region("board data", (unsigned long)barebox_boarddata,
 				     barebox_boarddata_size);
 
+	if (IS_ENABLED(CONFIG_KASAN))
+		request_sdram_region("kasan shadow", kasan_shadow_base,
+				     mem_malloc_start() - kasan_shadow_base);
+
 	return 0;
 }
 device_initcall(barebox_memory_areas_init);
-- 
2.39.2