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 9CE82C4332F for ; Tue, 8 Nov 2022 13:54:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234721AbiKHNyq (ORCPT ); Tue, 8 Nov 2022 08:54:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56602 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234698AbiKHNyo (ORCPT ); Tue, 8 Nov 2022 08:54:44 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4D57D10BA for ; Tue, 8 Nov 2022 05:54:44 -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 sin.source.kernel.org (Postfix) with ESMTPS id BB2CFCE1B8E for ; Tue, 8 Nov 2022 13:54:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 91903C433B5; Tue, 8 Nov 2022 13:54:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667915681; bh=xF6SaqiHXRWHu13SpIZhjfbTsJONB7zD8WaO5tw8iAo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=do/S5sjBSBLyogaw9XX0Qaj35wy5HNRgu0q0hPngR/RNoe8aMdv9Vzm/vI+fqc+/R MJ17EWnbRT6RCyjn2YwBLlEMLK4He0BEFY4fpAoLgqORzSOvxF4TtklUrb1bqbXD8y qe7W2O6tqIh7lEI28NBr+IZ3s721jOBMm1HniGlE= 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 5.10 061/118] media: cros-ec-cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 8 Nov 2022 14:38:59 +0100 Message-Id: <20221108133343.372687380@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221108133340.718216105@linuxfoundation.org> References: <20221108133340.718216105@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 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 2d95e16cd248..f66699d5dc66 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