linux-kernel - Re: [PATCH] arm64: uprobes: Optimize cache flushes for xol slot

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Message-ID: <522284d3-9655-3703-00e9-33f358dbc78d@huawei.com>
Date: Thu, 26 Sep 2024 20:06:42 +0800
From: "Liao, Chang" <liaochang1@...wei.com>
To: Oleg Nesterov <oleg@...hat.com>, Will Deacon <will@...nel.org>
CC: Catalin Marinas <catalin.marinas@....com>, <mhiramat@...nel.org>,
	<peterz@...radead.org>, <mark.rutland@....com>,
	<linux-kernel@...r.kernel.org>, <linux-trace-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] arm64: uprobes: Optimize cache flushes for xol slot



在 2024/9/23 18:52, Oleg Nesterov 写道:
> On 09/23, Will Deacon wrote:
>>
>> However, we should use __GFP_ZERO anyway
>> because I don't think it's a good idea to map an uninitialised page into
>> userspace.
> 
> Agreed, and imo this even needs a separate "fix info leak" patch.

Do you mean to fill the entire page with CPU specific illegal instructions
in this patch?

> 
> Oleg.
> 
> 

-- 
BR
Liao, Chang