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 658ABC4332F for ; Tue, 8 Nov 2022 13:46:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234532AbiKHNqT (ORCPT ); Tue, 8 Nov 2022 08:46:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46154 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234530AbiKHNqS (ORCPT ); Tue, 8 Nov 2022 08:46:18 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A6C035984E for ; Tue, 8 Nov 2022 05:46:17 -0800 (PST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 4748161596 for ; Tue, 8 Nov 2022 13:46:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E45D0C433C1; Tue, 8 Nov 2022 13:46:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667915176; bh=qau5o1gWNRT7hnU7BJTNSR3XmPp6afM6aLwWeSom3Jk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ftofydRv+DdRFTJfQ9SdYgd08mGGUD2D4SbwjtxbjuehLdNjSW7QJ83QX119K/mgL 4ZIizJlvN0IlODRsEuxiAk6U7dbEhJF7f7q/2TBat7JnTxonk5PSu0JSpTpvqB0OWi HnAo5PUoutAhcNxlIvUW1ZPd91S/edVv02hEY43Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.19 25/48] media: s5p_cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 8 Nov 2022 14:39:10 +0100 Message-Id: <20221108133330.416046362@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221108133329.533809494@linuxfoundation.org> References: <20221108133329.533809494@linuxfoundation.org> User-Agent: quilt/0.67 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: Hans Verkuil [ Upstream commit 93f65ce036863893c164ca410938e0968964b26c ] I expect that the hardware will have limited this to 16, but just in case it hasn't, check for this corner case. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/s5p-cec/s5p_cec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/platform/s5p-cec/s5p_cec.c b/drivers/media/platform/s5p-cec/s5p_cec.c index 3032247c63a5..554c8f2b60b8 100644 --- a/drivers/media/platform/s5p-cec/s5p_cec.c +++ b/drivers/media/platform/s5p-cec/s5p_cec.c @@ -116,6 +116,8 @@ static irqreturn_t s5p_cec_irq_handler(int irq, void *priv) dev_dbg(cec->dev, "Buffer overrun (worker did not process previous message)\n"); cec->rx = STATE_BUSY; cec->msg.len = status >> 24; + if (cec->msg.len > CEC_MAX_MSG_SIZE) + cec->msg.len = CEC_MAX_MSG_SIZE; cec->msg.rx_status = CEC_RX_STATUS_OK; s5p_cec_get_rx_buf(cec, cec->msg.len, cec->msg.msg); -- 2.35.1