From: Will Deacon <will@kernel.org>
To: George Spelvin <lkml@SDF.ORG>
Cc: lkml@sdf.org, catalin.marinas@arm.com,
linux-kernel@vger.kernel.org, Hsin-Yi Wang <hsinyi@chromium.org>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] arm64: kexec_file: Avoid temp buffer for RNG seed
Date: Tue, 28 Apr 2020 15:49:39 +0100 [thread overview]
Message-ID: <158807855142.208424.6865350866606582490.b4-ty@kernel.org> (raw)
In-Reply-To: <20200330173801.GA9199@SDF.ORG>
On Mon, 30 Mar 2020 17:38:01 +0000, George Spelvin wrote:
> After using get_random_bytes(), you want to wipe the buffer
> afterward so the seed remains secret.
>
> In this case, we can eliminate the temporary buffer entirely.
> fdt_setprop_placeholder() returns a pointer to the property value
> buffer, allowing us to put the random data directly in there without
> using a temporary buffer at all. Faster and less stack all in one.
Applied to arm64 (for-next/misc), thanks!
[1/1] arm64: kexec_file: Avoid temp buffer for RNG seed
https://git.kernel.org/arm64/c/99ee28d99607
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
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prev parent reply other threads:[~2020-04-28 14:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-10 15:45 [RFC PATCH v1 39/50] arm: kexec_file: Avoid temp buffer for RNG seed George Spelvin
2020-03-28 19:04 ` Hsin-Yi Wang
2020-03-30 11:07 ` Mark Rutland
2020-03-30 13:37 ` Will Deacon
2020-03-30 17:38 ` [PATCH v2] arm64: " George Spelvin
2020-04-28 14:49 ` Will Deacon [this message]
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