From patchwork Wed May 12 14:42:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 437092 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 5B342C433B4 for ; Wed, 12 May 2021 15:16:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2BE4B610F8 for ; Wed, 12 May 2021 15:16:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233055AbhELPRf (ORCPT ); Wed, 12 May 2021 11:17:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:50766 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233941AbhELPPi (ORCPT ); Wed, 12 May 2021 11:15:38 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6972B6193E; Wed, 12 May 2021 15:05:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620831911; bh=SFe4uRmtVkrqxJZehugrkHwY3YxnnFtWZhVWl5HPHM4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=luDzcDV5skNM4LgzGPJnPkznlvASmBxH24OBQf3hoGwSsFjTVQ6wMwkcjZTbiMRKX +q9tAB85Na37g3F7psRkjOa30FLC0dLTIpzOQsTAAv9f0JYCmErMYlfYnRbkXCSHBL CbPPTamBGEJbVgmPVYCT/LPnsMXO9UuCXQEsZ3J0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?utf-8?q?Christian_K=C3=B6nig?= , Colin Ian King , Alex Deucher Subject: [PATCH 5.10 064/530] drm/radeon: fix copy of uninitialized variable back to userspace Date: Wed, 12 May 2021 16:42:54 +0200 Message-Id: <20210512144821.863009550@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144819.664462530@linuxfoundation.org> References: <20210512144819.664462530@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Colin Ian King commit 8dbc2ccac5a65c5b57e3070e36a3dc97c7970d96 upstream. Currently the ioctl command RADEON_INFO_SI_BACKEND_ENABLED_MASK can copy back uninitialised data in value_tmp that pointer *value points to. This can occur when rdev->family is less than CHIP_BONAIRE and less than CHIP_TAHITI. Fix this by adding in a missing -EINVAL so that no invalid value is copied back to userspace. Addresses-Coverity: ("Uninitialized scalar variable) Cc: stable@vger.kernel.org # 3.13+ Fixes: 439a1cfffe2c ("drm/radeon: expose render backend mask to the userspace") Reviewed-by: Christian König Signed-off-by: Colin Ian King Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/radeon_kms.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/gpu/drm/radeon/radeon_kms.c +++ b/drivers/gpu/drm/radeon/radeon_kms.c @@ -512,6 +512,7 @@ static int radeon_info_ioctl(struct drm_ *value = rdev->config.si.backend_enable_mask; } else { DRM_DEBUG_KMS("BACKEND_ENABLED_MASK is si+ only!\n"); + return -EINVAL; } break; case RADEON_INFO_MAX_SCLK: