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 95639FA3745 for ; Tue, 1 Nov 2022 11:38:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231388AbiKALia (ORCPT ); Tue, 1 Nov 2022 07:38:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231297AbiKALiD (ORCPT ); Tue, 1 Nov 2022 07:38:03 -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 543BD1B1E4; Tue, 1 Nov 2022 04:32:23 -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 E9A8DB81CDB; Tue, 1 Nov 2022 11:31:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D4F1CC433C1; Tue, 1 Nov 2022 11:31:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667302309; bh=qfPtwSHuxdqmU3RDuO0CxE1LqMmqchKl638v/0OFALY=; h=From:To:Cc:Subject:Date:From; b=fBQaZwFaHIjp2RhSGm3IQ0KZHMSpNypMF/3RAZ0p7WkA1d+PpdQdrANanYs9hyAXp qcbbI6Ftuwj0kkMSjQgDCXBibt7WicGd/P4PoAsNoa9Eo3ZD8Pc0ssralBhEJuY7uK aLLGYrr+hPj+IZyrkv4yVs/ztFO+VFPUrAQMZhOwT9/owuesz4r0oKd8HETkqvqnf6 MFUeWY3ff6G5W27GWxbSEwd7AWcMctMflSYOtvB3XxPuexZbeiITIsTgkoium4ETTM BkPU5jfiWrf3NBzCzZjQrjKaaz44Xy6FaHCHCHiCTh5TqsxCo2UACoVwHp5Sr1gSsk piqUq7jnjOyDA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , gregkh@linuxfoundation.org, linux-media@vger.kernel.org, linux-staging@lists.linux.dev Subject: [PATCH AUTOSEL 4.9 1/3] media: s5p_cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 1 Nov 2022 07:31:43 -0400 Message-Id: <20221101113147.801048-1-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/staging/media/s5p-cec/s5p_cec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/staging/media/s5p-cec/s5p_cec.c b/drivers/staging/media/s5p-cec/s5p_cec.c index bebd44d9bd51..f6d1d98431a7 100644 --- a/drivers/staging/media/s5p-cec/s5p_cec.c +++ b/drivers/staging/media/s5p-cec/s5p_cec.c @@ -112,6 +112,8 @@ 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