From patchwork Wed May 12 14:47:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 437919 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 D20EFC433ED for ; Wed, 12 May 2021 16:53:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2A7D61263 for ; Wed, 12 May 2021 16:53:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239734AbhELQyq (ORCPT ); Wed, 12 May 2021 12:54:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:36542 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243835AbhELQmJ (ORCPT ); Wed, 12 May 2021 12:42:09 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id AA56661C3D; Wed, 12 May 2021 16:07:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620835644; bh=DrqMZi4nokZn0/DxIwSbci06QRoDDiDNmpuUd/ZCHrk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j7YyrTr96HhY+UaoBsbhO/kiEi2vp6zw4890IbTv4gaxle1wC/iNf23Rsrb6uBorw eBXxCbH2XXfhERq7tsoLkW0GxX106FIom+lhsvYbmneITLuWEIYe4/SOd4I9xfCOJz IjE36wB3jzJ4ywfEe3VlsA7maCX5hepA70qxq74Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nathan Chancellor , "Peter Zijlstra (Intel)" , Sasha Levin Subject: [PATCH 5.12 428/677] x86/events/amd/iommu: Fix sysfs type mismatch Date: Wed, 12 May 2021 16:47:54 +0200 Message-Id: <20210512144851.563580620@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Nathan Chancellor [ Upstream commit de5bc7b425d4c27ae5faa00ea7eb6b9780b9a355 ] dev_attr_show() calls _iommu_event_show() via an indirect call but _iommu_event_show()'s type does not currently match the type of the show() member in 'struct device_attribute', resulting in a Control Flow Integrity violation. $ cat /sys/devices/amd_iommu_1/events/mem_dte_hit csource=0x0a $ dmesg | grep "CFI failure" [ 3526.735140] CFI failure (target: _iommu_event_show...): Change _iommu_event_show() and 'struct amd_iommu_event_desc' to 'struct device_attribute' so that there is no more CFI violation. Fixes: 7be6296fdd75 ("perf/x86/amd: AMD IOMMU Performance Counter PERF uncore PMU implementation") Signed-off-by: Nathan Chancellor Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20210415001112.3024673-1-nathan@kernel.org Signed-off-by: Sasha Levin --- arch/x86/events/amd/iommu.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c index be50ef8572cc..6a98a7651621 100644 --- a/arch/x86/events/amd/iommu.c +++ b/arch/x86/events/amd/iommu.c @@ -81,12 +81,12 @@ static struct attribute_group amd_iommu_events_group = { }; struct amd_iommu_event_desc { - struct kobj_attribute attr; + struct device_attribute attr; const char *event; }; -static ssize_t _iommu_event_show(struct kobject *kobj, - struct kobj_attribute *attr, char *buf) +static ssize_t _iommu_event_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct amd_iommu_event_desc *event = container_of(attr, struct amd_iommu_event_desc, attr);