linux-kernel - Re: [RFT PATCH v2 1/4] arm64: fix possible invalid FPSIMD initialization state

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20131014135457.GE7682@arm.com>
Date:	Mon, 14 Oct 2013 14:54:58 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Jiang Liu <liuj97@...il.com>
Cc:	Will Deacon <Will.Deacon@....com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFT PATCH v2 1/4] arm64: fix possible invalid FPSIMD
 initialization state

On Sun, Oct 13, 2013 at 03:20:17PM +0100, Jiang Liu wrote:
> From: Jiang Liu <jiang.liu@...wei.com>
> 
> If context switching happens during executing fpsimd_flush_thread(),
> stale value in FPSIMD registers will be saved into current thread's
> fpsimd_state by fpsimd_thread_switch(). That may cause invalid
> initialization state for the new process, so disable preemption
> when executing fpsimd_flush_thread().
> 
> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
> Cc: Jiang Liu <liuj97@...il.com>

That's already in mainline (3.12-rc4).

-- 
Catalin
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/