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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 351C1C433F5 for ; Tue, 5 Apr 2022 09:27:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347492AbiDEJ05 (ORCPT ); Tue, 5 Apr 2022 05:26:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236378AbiDEIQn (ORCPT ); Tue, 5 Apr 2022 04:16:43 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 849166FA02; Tue, 5 Apr 2022 01:04:01 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3AAD7B81BBC; Tue, 5 Apr 2022 08:03:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82335C385A4; Tue, 5 Apr 2022 08:03:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649145830; bh=+dtZf56pDcVGj1Y2yGsngkE8Pr8vjsaRXriBUUn+Sa4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XIfGGpCvyIJgGXR2Jwu/4cS+3RAQHWFaiLZj2mGrr8eWoQDFUNjbb20RnW0/A2Qby irIo1Swi9CoruaIV83NPsY/5xlhA+x+pB1t1yudRIpJVoYw0c64ZNPSTOm+Eq53kgn dwnV3hcojviaJYRSXtOItVg2wZ7UI+jBs4dx9qG8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pin-Yen Lin , Jernej Skrabec , Robert Foss , Sasha Levin Subject: [PATCH 5.17 0544/1126] drm/bridge: anx7625: Fix overflow issue on reading EDID Date: Tue, 5 Apr 2022 09:21:31 +0200 Message-Id: <20220405070423.600520464@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070407.513532867@linuxfoundation.org> References: <20220405070407.513532867@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: Pin-Yen Lin [ Upstream commit d5c6f647aec9ed524aedd04a3aec5ebc21d39007 ] The length of EDID block can be longer than 256 bytes, so we should use `int` instead of `u8` for the `edid_pos` variable. Fixes: 8bdfc5dae4e3 ("drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP") Signed-off-by: Pin-Yen Lin Reviewed-by: Jernej Skrabec Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20220210103827.402436-1-treapking@chromium.org Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/analogix/anx7625.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 2346dbcc505f..e596cacce9e3 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -846,7 +846,8 @@ static int segments_edid_read(struct anx7625_data *ctx, static int sp_tx_edid_read(struct anx7625_data *ctx, u8 *pedid_blocks_buf) { - u8 offset, edid_pos; + u8 offset; + int edid_pos; int count, blocks_num; u8 pblock_buf[MAX_DPCD_BUFFER_SIZE]; u8 i, j; -- 2.34.1