From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2B100C433B4 for ; Tue, 13 Apr 2021 06:54:34 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B91F661278 for ; Tue, 13 Apr 2021 06:54:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B91F661278 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 54D268938B; Tue, 13 Apr 2021 06:54:33 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6B4BE8938B for ; Tue, 13 Apr 2021 06:54:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=jwxAycbsASm0GWf+9F+ExTwdizKmiUk4L1b8AT82ci4=; b=B1tSGz0kmdSV5QlZ5Htwor9uWY n3hiBIHetYE7C+PLuxLVRKAkmPHzukonxNO9wdGDplzNkZkqs7jVTeXkKXvwft2StBK7bDB3N8LGL aWl0vqGkhfGBpr035kdhDvJg1a2Em9vaduUClXR6ZOBGMarfChN3JMwbBQhV5BkzvnakKWM4kZGTF s8f0ifOQdMYU1boXKX1/2NVB1cZgW2YHV+HBs0a3SNMVNhNm6qtWAauEgQLqz11MRTviRcl8TByo6 XvK24VGuMw8jh9RhTIpfiQrqsPrCtQJQKyAZnja2HwOjidBQ8k0Z7IBdqdre9yDaLNR4yslgM/GAt lWQzuIrA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lWCw5-008RQa-Im; Tue, 13 Apr 2021 06:54:09 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 78477300036; Tue, 13 Apr 2021 08:54:06 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 2B80E200CF8CA; Tue, 13 Apr 2021 08:54:06 +0200 (CEST) Date: Tue, 13 Apr 2021 08:54:06 +0200 From: Peter Zijlstra To: Kees Cook Message-ID: References: <20210412080012.357146277@infradead.org> <20210412080611.769864829@infradead.org> <202104121302.57D7EF8@keescook> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <202104121302.57D7EF8@keescook> Subject: Re: [Intel-gfx] [PATCH 4/7] mm: Introduce verify_page_range() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jgross@suse.com, sstabellini@kernel.org, intel-gfx@lists.freedesktop.org, x86@kernel.org, linux-kernel@vger.kernel.org, chris@chris-wilson.co.uk, linux-mm@kvack.org, boris.ostrovsky@oracle.com, hch@lst.de, akpm@linux-foundation.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Mon, Apr 12, 2021 at 01:05:09PM -0700, Kees Cook wrote: > On Mon, Apr 12, 2021 at 10:00:16AM +0200, Peter Zijlstra wrote: > > +struct vpr_data { > > + int (*fn)(pte_t pte, unsigned long addr, void *data); > > + void *data; > > +}; > > Eeerg. This is likely to become an attack target itself. Stored function > pointer with stored (3rd) argument. You got some further reading on that? How exactly are those exploited? _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx