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

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Message-ID: <20240923105228.GB20793@redhat.com>
Date: Mon, 23 Sep 2024 12:52:29 +0200
From: Oleg Nesterov <oleg@...hat.com>
To: Will Deacon <will@...nel.org>
Cc: "Liao, Chang" <liaochang1@...wei.com>,
	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

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.

Oleg.