Re: [PATCH 07/12] perf_events: add LBR software filter support for Intel X86

[Andi Kleen]

> +	kernel_insn_init(&insn, kaddr);
> +	insn_get_opcode(&insn);

This makes me uncomfortable. AFAIK that's the first use of the opcode
decoder being used directly for user space. It has a quite large attack
surface. Who says it cannot be exploited?

-Andi
-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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