Value of macro MIDR_IMPLEMENTOR_MASK exceeds the range of integer and can lead to overflow. Currently there is no issue as it is used in an expression implicitly casted to u32 in MIDR_IS_CPU_MODEL_RANGE. To avoid possible problems, fix the macro.
Signed-off-by: Michal Orzel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Catalin Marinas <[email protected]> Origin: git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git (48e6f22e25a4) --- Changes since v1: - add Origin tag as the patch was merged in upstream arm64 linux tree --- xen/arch/arm/include/asm/processor.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/arm/include/asm/processor.h b/xen/arch/arm/include/asm/processor.h index 852b5f3c24..7a1c4c4410 100644 --- a/xen/arch/arm/include/asm/processor.h +++ b/xen/arch/arm/include/asm/processor.h @@ -39,7 +39,7 @@ #define MIDR_VARIANT(midr) \ (((midr) & MIDR_VARIANT_MASK) >> MIDR_VARIANT_SHIFT) #define MIDR_IMPLEMENTOR_SHIFT 24 -#define MIDR_IMPLEMENTOR_MASK (0xff << MIDR_IMPLEMENTOR_SHIFT) +#define MIDR_IMPLEMENTOR_MASK (0xffU << MIDR_IMPLEMENTOR_SHIFT) #define MIDR_IMPLEMENTOR(midr) \ (((midr) & MIDR_IMPLEMENTOR_MASK) >> MIDR_IMPLEMENTOR_SHIFT) -- 2.25.1
