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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 ACCCDC433E1 for ; Mon, 17 Aug 2020 19:38:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8068420674 for ; Mon, 17 Aug 2020 19:38:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597693107; bh=E4lK+dqFUzpw7gqJd5bSG/HC6k97NF3vbobVxr/JN90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=M3OZrREQslbfLjkJMdEHcuvxUrKwaM6SHk56rDQ/BqO4E8Cb0XQm3xxNbnKWgHxk5 vnGgWMgX3nIjHMOwPZL+/v9l7+mmhlsfYnPqfIq5aQgw2iQFFOOOs9ilKJAOgFWa82 9TKI5iZZCnMXTK4KCJmpbJJ7BucRKRav6OCfUnqE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732451AbgHQTiY (ORCPT ); Mon, 17 Aug 2020 15:38:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:37796 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729411AbgHQP1K (ORCPT ); Mon, 17 Aug 2020 11:27:10 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 78D08238E6; Mon, 17 Aug 2020 15:27:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597678030; bh=E4lK+dqFUzpw7gqJd5bSG/HC6k97NF3vbobVxr/JN90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0oDnuHAuucrPbLkj6kxvJ3mp7WbkJbXAaCJ1VX4gqauUwlahT2GbgP1Ct1Jy2S6zp llIyFxwPyeQwx+qR8Au22zdVCd/M+R7X8uju25fD/dT8lJb0Ig+7E3yKcXOboB59PP 3SdZICkJ9Kb0CrGmedD71fSDeherPzV+MfPxRAkc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Colin Ian King , Alex Deucher , Sasha Levin Subject: [PATCH 5.8 195/464] drm/radeon: fix array out-of-bounds read and write issues Date: Mon, 17 Aug 2020 17:12:28 +0200 Message-Id: <20200817143843.162887170@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143833.737102804@linuxfoundation.org> References: <20200817143833.737102804@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Colin Ian King [ Upstream commit 7ee78aff9de13d5dccba133f4a0de5367194b243 ] There is an off-by-one bounds check on the index into arrays table->mc_reg_address and table->mc_reg_table_entry[k].mc_data[j] that can lead to reads and writes outside of arrays. Fix the bound checking off-by-one error. Addresses-Coverity: ("Out-of-bounds read/write") Fixes: cc8dbbb4f62a ("drm/radeon: add dpm support for CI dGPUs (v2)") Signed-off-by: Colin Ian King Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/radeon/ci_dpm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c index f434efdeca44d..ba20c6f037198 100644 --- a/drivers/gpu/drm/radeon/ci_dpm.c +++ b/drivers/gpu/drm/radeon/ci_dpm.c @@ -4351,7 +4351,7 @@ static int ci_set_mc_special_registers(struct radeon_device *rdev, table->mc_reg_table_entry[k].mc_data[j] |= 0x100; } j++; - if (j > SMU7_DISCRETE_MC_REGISTER_ARRAY_SIZE) + if (j >= SMU7_DISCRETE_MC_REGISTER_ARRAY_SIZE) return -EINVAL; if (!pi->mem_gddr5) { -- 2.25.1