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 71480FA3743 for ; Tue, 1 Nov 2022 11:37:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231252AbiKALhx (ORCPT ); Tue, 1 Nov 2022 07:37:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231377AbiKALhV (ORCPT ); Tue, 1 Nov 2022 07:37:21 -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 06B581D651; Tue, 1 Nov 2022 04:32:07 -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 B0105B81CC7; Tue, 1 Nov 2022 11:31:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6208C433C1; Tue, 1 Nov 2022 11:31:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667302261; bh=Kw4Nn01bzJRVrsHjMDBHatH2mY1/n9rmS1Khm+s9vkk=; h=From:To:Cc:Subject:Date:From; b=vDwmwT7EeqTQduPCn1sd1X1H5u/izqIp9OXJidjWQ/aVDEQgJTGIx7YDO58FWvwK3 ANchDS7qLU6eWMs5YsmRRzxkq4QdZrA5s+S1TUgNjcRoAohZXgIChnej7M+j0E+6P2 3bSwX4XFBXtTZ7Il44BNkHSLwobBkJWCOaCFwCbTa5pTBlhJO3oO0jT1dcATNhXbFy ISBADdhNJHRMIGuhf5YDtJ4DFqZbX3U2wQCvTNQ1x5z9NWW1vA0LTCzXpdJjzSWQQo +2un1c2vDC8f5mR5Yl89QFOqwxZsAglP354ypPhE7OINg+RIdSp4rvTZM5oWLS1rrQ GEyb0ZK4NwQwA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 1/8] media: s5p_cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 1 Nov 2022 07:30:50 -0400 Message-Id: <20221101113059.800777-1-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 828792b854f5..0c668d4a3daa 100644 --- a/drivers/media/platform/s5p-cec/s5p_cec.c +++ b/drivers/media/platform/s5p-cec/s5p_cec.c @@ -115,6 +115,8 @@ 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