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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C58E4C433FE for ; Mon, 1 Nov 2021 09:42:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2DB060C4B for ; Mon, 1 Nov 2021 09:42:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233428AbhKAJpC (ORCPT ); Mon, 1 Nov 2021 05:45:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:47892 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234019AbhKAJnw (ORCPT ); Mon, 1 Nov 2021 05:43:52 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 75AE96139D; Mon, 1 Nov 2021 09:29:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1635758942; bh=9g/RVMqCKCYsmHZgYuQhLhr6c/CRsZfO74101G/VfAM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Psr8cQC5W8xZaRS4fFQi0ZLr/WxuBEyMs0QCclynWnhx+elo1/IsNzGe2kdC8KQak OSBgP1Oc0Tld+ynRJhG6XFY7gBUtCrlnXYj946r4ov1OzmisVVKmSfl85MiIeAfT7U qUxYOF1X9N8fkDn0OXOOS2j64enmRWRDvTbIAP+w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Thelford Williams , Alex Deucher Subject: [PATCH 5.14 048/125] drm/amdgpu: fix out of bounds write Date: Mon, 1 Nov 2021 10:17:01 +0100 Message-Id: <20211101082542.281324405@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211101082533.618411490@linuxfoundation.org> References: <20211101082533.618411490@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Thelford Williams commit 5afa7898ab7a0ec9c28556a91df714bf3c2f725e upstream. Size can be any value and is user controlled resulting in overwriting the 40 byte array wr_buf with an arbitrary length of data from buf. Signed-off-by: Thelford Williams Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c @@ -263,7 +263,7 @@ static ssize_t dp_link_settings_write(st if (!wr_buf) return -ENOSPC; - if (parse_write_buffer_into_params(wr_buf, size, + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, (long *)param, buf, max_param_num, ¶m_nums)) {