save_boot_params_default() in cpu.c accesses uninitialized stack area
when it compiled with -O0 (not optimized).
Signed-off-by: Tetsuyuki Kobayashi <k...@kmckk.co.jp>
---
Changes for v2:
- include <linux/compiler.h> and use __naked instead of __attribute__((naked))
arch/arm/cpu/armv7/cpu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm/cpu/armv7/cpu.c b/arch/arm/cpu/armv7/cpu.c
index c6fa8ef..3e2a75c 100644
--- a/arch/arm/cpu/armv7/cpu.c
+++ b/arch/arm/cpu/armv7/cpu.c
@@ -36,9 +36,13 @@
#include <asm/system.h>
#include <asm/cache.h>
#include <asm/armv7.h>
+#include <linux/compiler.h>
+__naked /* don't save anything to stack even if compiled with -O0 */
void save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3)
{
+ /* stack is not yet initialized */
+ asm("bx lr");
}
void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3)
-- 1.7.9.5
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