linux-kernel - Re: [PATCH] arm64: Fix KASAN random tag seed initialization

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Message-Id: <172371633726.361921.8377586123195957148.b4-ty@arm.com>
Date: Thu, 15 Aug 2024 11:07:36 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: linux-arm-kernel@...ts.infradead.org,
	Samuel Holland <samuel.holland@...ive.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Andrey Konovalov <andreyknvl@...il.com>,
	Ard Biesheuvel <ardb@...nel.org>,
	Douglas Anderson <dianders@...omium.org>,
	Frederic Weisbecker <frederic@...nel.org>,
	James Morse <james.morse@....com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Mark Rutland <mark.rutland@....com>,
	Puranjay Mohan <puranjay@...nel.org>,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	Ryo Takakura <takakura@...inux.co.jp>,
	Shaoqin Huang <shahuang@...hat.com>,
	Stephen Boyd <swboyd@...omium.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Will Deacon <will@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: Fix KASAN random tag seed initialization

On Wed, 14 Aug 2024 02:09:53 -0700, Samuel Holland wrote:
> Currently, kasan_init_sw_tags() is called before setup_per_cpu_areas(),
> so per_cpu(prng_state, cpu) accesses the same address regardless of the
> value of "cpu", and the same seed value gets copied to the percpu area
> for every CPU. Fix this by moving the call to smp_prepare_boot_cpu(),
> which is the first architecture hook after setup_per_cpu_areas().
> 
> 
> [...]

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

[1/1] arm64: Fix KASAN random tag seed initialization
      https://git.kernel.org/arm64/c/f75c235565f9

-- 
Catalin