linux-kernel - Re: [RFC]arm64:Mark __stack_chk_guard as __ro_after

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Message-Id: <163181210192.884883.7181525441852917097.b4-ty@arm.com>
Date:   Thu, 16 Sep 2021 18:08:25 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     will@...nel.org, Dan Li <ashimida@...ux.alibaba.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC]arm64:Mark __stack_chk_guard as __ro_after_init

On Tue, 14 Sep 2021 17:44:02 +0800, Dan Li wrote:
> __stack_chk_guard is setup once while init stage and never changed
> after that.
> 
> Although the modification of this variable at runtime will usually
> cause the kernel to crash (so dose the attacker), it should be marked
> as _ro_after_init, and it should not affect performance if it is
> placed in the ro_after_init section.
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64:Mark __stack_chk_guard as __ro_after_init
      https://git.kernel.org/arm64/c/9fcb2e93f41c

-- 
Catalin