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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 08056ECE587 for ; Tue, 1 Oct 2019 16:52:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C8B022168B for ; Tue, 1 Oct 2019 16:52:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948769; bh=+DuzRebULHDIvNsak8ePy67Juc3WVmR5apIXYtucy5w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2PZWP7JUDYjQ9iBF3Rw6lGVyuxbWunxnBSTjVvZlZyYW76tREVVowAL9UAG12tFMv dHAZR8EQiC+5hWfd3O53S/jwuqQm+fLuT/UqGS0uUvy715Gb0764KwQfdTbelxFnRJ pIO3uW56gWsxAk6fwyg7Un1XBJ0ROLTvgLCm5c8s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732889AbfJAQnj (ORCPT ); Tue, 1 Oct 2019 12:43:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:55618 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726621AbfJAQnc (ORCPT ); Tue, 1 Oct 2019 12:43:32 -0400 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 E6CD321906; Tue, 1 Oct 2019 16:43:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948211; bh=+DuzRebULHDIvNsak8ePy67Juc3WVmR5apIXYtucy5w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZAh0N3vPt4vGPEibB6Vv0li8CJhW5JtI/MhQophDyuGblSD+TdDL73UOlGawb1VxE W6OO9WZNkiRMSR5i6gAMJh7o3NIlJ4guAtDuVm77VsmJNHKvyxZv2QO30S4UV+BIRh 3PBzALIbvnaihJryTVuY0JYzUZbmXOKQxwHuFW0w= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Trek , Alex Deucher , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 4.19 14/43] drm/amdgpu: Check for valid number of registers to read Date: Tue, 1 Oct 2019 12:42:42 -0400 Message-Id: <20191001164311.15993-14-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191001164311.15993-1-sashal@kernel.org> References: <20191001164311.15993-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Trek [ Upstream commit 73d8e6c7b841d9bf298c8928f228fb433676635c ] Do not try to allocate any amount of memory requested by the user. Instead limit it to 128 registers. Actually the longest series of consecutive allowed registers are 48, mmGB_TILE_MODE0-31 and mmGB_MACROTILE_MODE0-15 (0x2644-0x2673). Bug: https://bugs.freedesktop.org/show_bug.cgi?id=111273 Signed-off-by: Trek Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c index c0396e83f3526..fc93b103f7778 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -562,6 +562,9 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file if (sh_num == AMDGPU_INFO_MMR_SH_INDEX_MASK) sh_num = 0xffffffff; + if (info->read_mmr_reg.count > 128) + return -EINVAL; + regs = kmalloc_array(info->read_mmr_reg.count, sizeof(*regs), GFP_KERNEL); if (!regs) return -ENOMEM; -- 2.20.1