Mark Rutland 19791a7ca6 arm64: fix possible spectre-v1 in ptrace_hbp_get_event()
It's possible for userspace to control idx. Sanitize idx when using it
as an array index.

Found by smatch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-04-26 16:58:39 +01:00
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