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 225BDFA373D for ; Tue, 1 Nov 2022 11:36:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231341AbiKALgR (ORCPT ); Tue, 1 Nov 2022 07:36:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46840 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231285AbiKALfc (ORCPT ); Tue, 1 Nov 2022 07:35:32 -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 110A01CB27; Tue, 1 Nov 2022 04:31:23 -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 A1B62B81CCC; Tue, 1 Nov 2022 11:31:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A359FC433C1; Tue, 1 Nov 2022 11:31:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667302281; bh=qau5o1gWNRT7hnU7BJTNSR3XmPp6afM6aLwWeSom3Jk=; h=From:To:Cc:Subject:Date:From; b=iXi2VwaRR7e1dh8J7iwyaG9PAJSq3QMHlyds1iRcmUTHJIjzgYQ1VeucWWIC69I/C oO4T2ylg7fY43p+KOqH/xLhna81ynb36RAK0Le7JmG0RwtwqrOZfXhKdtUQtEafaYz 7DWcPYzUAGf8R87ptg0CIkVP1tr42wMIXncjzt4AP9cJZEifB074IrUFarZjS/1dqc byovLLrLSCn9ZzAl7vQnAmiuIqJrFq9VVSFyBBnvnB0Gguxo2Vol2GIcubCyQnzEOQ Mg9FIPJeqCk5wRMHu1qhIB0X86d2xZSJOTQYoeVaJ1WkhrPt7RIrWJFNO1oo+JnZcI /dbDdxG6s5QUg== 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 4.19 1/6] media: s5p_cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 1 Nov 2022 07:31:11 -0400 Message-Id: <20221101113118.800889-1-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 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