| From: Dave Martin <Dave.Martin@arm.com> |
| Date: Wed, 18 Jan 2017 16:25:23 +0000 |
| Subject: arm64/ptrace: Avoid uninitialised struct padding in fpr_set() |
| |
| commit aeb1f39d814b2e21e5e5706a48834bfd553d0059 upstream. |
| |
| This patch adds an explicit __reserved[] field to user_fpsimd_state |
| to replace what was previously unnamed padding. |
| |
| This ensures that data in this region are propagated across |
| assignment rather than being left possibly uninitialised at the |
| destination. |
| |
| Fixes: 60ffc30d5652 ("arm64: Exception handling") |
| Signed-off-by: Dave Martin <Dave.Martin@arm.com> |
| Acked-by: Will Deacon <Will.Deacon@arm.com> |
| Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
| Signed-off-by: Ben Hutchings <ben@decadent.org.uk> |
| --- |
| arch/arm64/include/uapi/asm/ptrace.h | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| --- a/arch/arm64/include/uapi/asm/ptrace.h |
| +++ b/arch/arm64/include/uapi/asm/ptrace.h |
| @@ -75,6 +75,7 @@ struct user_fpsimd_state { |
| __uint128_t vregs[32]; |
| __u32 fpsr; |
| __u32 fpcr; |
| + __u32 __reserved[2]; |
| }; |
| |
| struct user_hwdebug_state { |
