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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 D2BF7C432C0 for ; Fri, 22 Nov 2019 06:03:08 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 955102068F for ; Fri, 22 Nov 2019 06:03:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="gEwSR93y" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 955102068F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 7442C861A3; Fri, 22 Nov 2019 06:03:08 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Tcm1f88QPKGV; Fri, 22 Nov 2019 06:03:07 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id EF5DF85DDC; Fri, 22 Nov 2019 06:03:07 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D308DC1D74; Fri, 22 Nov 2019 06:03:07 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id F1B98C18DA for ; Fri, 22 Nov 2019 06:03:06 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id E4788889CC for ; Fri, 22 Nov 2019 06:03:06 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3rSOt55QwFbf for ; Fri, 22 Nov 2019 06:03:05 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by hemlock.osuosl.org (Postfix) with ESMTPS id A207F889A0 for ; Fri, 22 Nov 2019 06:03:05 +0000 (UTC) Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BA96720717; Fri, 22 Nov 2019 06:03:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574402585; bh=b/jHQB1x+5NehrmLNVjMgte8dWT+yjMVkd02sMqx1aQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gEwSR93yKSMCQXhMkaZujy8KPT1WUN2R/n+yLqcUyXbgEI8rRnPd940kuX1WURdOZ tHF4z0DLqRT5hR6ivQ9hpJYTeSk8KKE4wwGFcY5NuzpuX8w1eUUdDUGNq5Sr0xSF/A z1IADrnW+gIV7XJu3uD1JInkO5BSIzRov7kmvrTk= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 86/91] iommu/amd: Fix NULL dereference bug in match_hid_uid Date: Fri, 22 Nov 2019 01:01:24 -0500 Message-Id: <20191122060129.4239-85-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191122060129.4239-1-sashal@kernel.org> References: <20191122060129.4239-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Cc: Aaron Ma , Sasha Levin , iommu@lists.linux-foundation.org, Joerg Roedel X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" From: Aaron Ma [ Upstream commit bb6bccba390c7d743c1e4427de4ef284c8cc6869 ] Add a non-NULL check to fix potential NULL pointer dereference Cleanup code to call function once. Signed-off-by: Aaron Ma Fixes: 2bf9a0a12749b ('iommu/amd: Add iommu support for ACPI HID devices') Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- drivers/iommu/amd_iommu.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index e81acb2b6ee7d..c898c70472bb2 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -176,10 +176,14 @@ static struct lock_class_key reserved_rbtree_key; static inline int match_hid_uid(struct device *dev, struct acpihid_map_entry *entry) { + struct acpi_device *adev = ACPI_COMPANION(dev); const char *hid, *uid; - hid = acpi_device_hid(ACPI_COMPANION(dev)); - uid = acpi_device_uid(ACPI_COMPANION(dev)); + if (!adev) + return -ENODEV; + + hid = acpi_device_hid(adev); + uid = acpi_device_uid(adev); if (!hid || !(*hid)) return -ENODEV; -- 2.20.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu