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 E3226C433F5 for ; Mon, 1 Nov 2021 09:36:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C6BDC60F70 for ; Mon, 1 Nov 2021 09:36:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233784AbhKAJiQ (ORCPT ); Mon, 1 Nov 2021 05:38:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:43532 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232461AbhKAJfm (ORCPT ); Mon, 1 Nov 2021 05:35:42 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0EC2F60FC4; Mon, 1 Nov 2021 09:25:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1635758744; bh=OFhFgoTqjgHpQ0g/he1vUsUlzMawSymqAoEcmB3xyj4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OTedU4rgsqhgMYtCSjtQH+GbHPeAbj4Vq6cRd7nj0ItV6b7hjICeyel80MO2jjTrq yCjxBbKLTkoV00pJWgul0rg2EmUuNaj87zAKQagVecKNV60EPblm+bZd5bgOP7V5Wt Pe9fkEIlW7O9xmfjthnuHihbYbAdIhkR+72amY6E= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Thelford Williams , Alex Deucher Subject: [PATCH 5.10 33/77] drm/amdgpu: fix out of bounds write Date: Mon, 1 Nov 2021 10:17:21 +0100 Message-Id: <20211101082518.830218093@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211101082511.254155853@linuxfoundation.org> References: <20211101082511.254155853@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: linux-kernel@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 @@ -264,7 +264,7 @@ 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)) {