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arm64/ptrace: Avoid uninitialised struct padding in fpr_set()

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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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dave Martin 2017-01-18 16:25:23 +00:00 committed by Greg Kroah-Hartman
parent 03ee97d68d
commit 4c87fc7f20
1 changed files with 1 additions and 0 deletions
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arch/arm64/include/uapi/asm/ptrace.h
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@ -76,6 +76,7 @@ struct user_fpsimd_state {
__uint128_t vregs[32];
__u32 fpsr;
__u32 fpcr;
__u32 __reserved[2];
};
struct user_hwdebug_state {