Re: [PATCH] x86/asm/entry/32: Reinstate clearing of pt_regs->r8..r11 on EFAULT path

[Ingo Molnar]

* Denys Vlasenko <dvlasenk@xxxxxxxxxx> wrote:

> I broke this recently when I changed pt_regs->r8..r11 clearing logic
> in INT 80 code path.
> 
> There is a branch from SYSENTER/SYSCALL code to INT 80 code:
> if we fail to retrieve arg6, we return EFAULT. Before this patch,
> in this case we don't clear pt_regs->r8..r11.
> 
> This patch fixes this. The resulting code is smaller and simpler.

So how did you notice this bug - through actual info leak testing, or review?

Thanks,

	Ingo
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