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 D502EFA3746 for ; Tue, 1 Nov 2022 11:28:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229993AbiKAL2T (ORCPT ); Tue, 1 Nov 2022 07:28:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230024AbiKAL15 (ORCPT ); Tue, 1 Nov 2022 07:27:57 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B943192A9; Tue, 1 Nov 2022 04:27:44 -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 191FDB81C9C; Tue, 1 Nov 2022 11:27:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 933BAC433C1; Tue, 1 Nov 2022 11:27:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667302061; bh=0EKF43HEq8O5ijotbSuBiQhZ8XlCp3GAnSXEbb9WZ0U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mk1oxr1jvoArgL+qtJqK5pPn1ipHPWdEKvOCsJkQ/fRYVtnM947I8A0/up3EY8i+l eTyle6apXx70p13gGMbrcRQgWD2ZZ2iGPdcf8SBO4w3FjHBhg/bUEaTDbHNqJ97w5P JAt//WHdzxgawCY27YwA66+5/Sdg73NbkOLMUkDcooii/mOg8vSLhnjU3RbixygIah 99oRdIAL2HdhzjGTTTnqjuZsTrYqxF8n0rTDy41wiT76ezgZesRBzN7ueNTjkqGTLJ BCpnCUxfyoGaXkh8jvfBphlwcTSKNbbOWaT5EuU0XZRSqepvKOh0M/z/RUaJW80abK ytY3hG4Mh1NNQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , bleung@chromium.org, groeck@chromium.org, ajye_huang@compal.corp-partner.google.com, zhuohao@chromium.org, hellojacky0226@hotmail.com, scott_chao@wistron.corp-partner.google.com, linux-media@vger.kernel.org, chrome-platform@lists.linux.dev Subject: [PATCH AUTOSEL 6.0 07/34] media: cros-ec-cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 1 Nov 2022 07:26:59 -0400 Message-Id: <20221101112726.799368-7-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221101112726.799368-1-sashal@kernel.org> References: <20221101112726.799368-1-sashal@kernel.org> 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 2dc73b48665411a08c4e5f0f823dea8510761603 ] 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/cec/platform/cros-ec/cros-ec-cec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c index 3b583ed4da9d..e5ebaa58be45 100644 --- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c +++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c @@ -44,6 +44,8 @@ static void handle_cec_message(struct cros_ec_cec *cros_ec_cec) uint8_t *cec_message = cros_ec->event_data.data.cec_message; unsigned int len = cros_ec->event_size; + if (len > CEC_MAX_MSG_SIZE) + len = CEC_MAX_MSG_SIZE; cros_ec_cec->rx_msg.len = len; memcpy(cros_ec_cec->rx_msg.msg, cec_message, len); -- 2.35.1