[PATCH 3.10 101/250] arm64/ptrace: Avoid uninitialised struct padding in fpr_set()

[Willy Tarreau]

From: Dave Martin <dave.mar...@arm.com>

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.mar...@arm.com>
Acked-by: Will Deacon <will.dea...@arm.com>
Signed-off-by: Catalin Marinas <catalin.mari...@arm.com>
Signed-off-by: Willy Tarreau <w...@1wt.eu>
---
 arch/arm64/include/uapi/asm/ptrace.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/include/uapi/asm/ptrace.h 
b/arch/arm64/include/uapi/asm/ptrace.h
index 6913643..c136fd5 100644
--- 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 {
-- 
2.8.0.rc2.1.gbe9624a