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 96FA9FA373D for ; Tue, 1 Nov 2022 11:31:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231139AbiKALbq (ORCPT ); Tue, 1 Nov 2022 07:31:46 -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 S230410AbiKALbC (ORCPT ); Tue, 1 Nov 2022 07:31:02 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4C4F819026; Tue, 1 Nov 2022 04:29:31 -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 sin.source.kernel.org (Postfix) with ESMTPS id AFBBECE1B32; Tue, 1 Nov 2022 11:29:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F3D6C433C1; Tue, 1 Nov 2022 11:29:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667302168; bh=7PwGxb7r347LjxhB4O5/10fNOWAkErVJVpC0gzC3rw8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vRaGlmNt81K5CjqDJX04w5soeTpVrPheIvf3ehoJcA1FNCJ1hHaJwGhV8mnGe46EW N4DByIxJB3Ey98ub8NBy5SfBBG+th3tSfyFWpN/Iz0dyzL2+uVE7+ai3ISSPAQKw6H Yxyo0E00dCWLhT8U+DrMPAIxsGLcQgMmggDC0U/+B4K1fSvcxmhOkX1J3nTRrj3pYt 49IZWb9nktnWHFtnfp5a0eFRPxKm4jgqqYqGVCbl83lsPldwQ4NlKroFhPrOjOyhoe gT44m3ejH5jrh9qIitZC15tr/ATMXYJ1zJOaX6Xp5xWSCbwX9w60P60ja/mkSUQGE4 ycNYA3cAgYPqw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , m.szyprowski@samsung.com, linux-samsung-soc@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 05/19] media: s5p_cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 1 Nov 2022 07:29:05 -0400 Message-Id: <20221101112919.799868-5-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221101112919.799868-1-sashal@kernel.org> References: <20221101112919.799868-1-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 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/cec/platform/s5p/s5p_cec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/cec/platform/s5p/s5p_cec.c b/drivers/media/cec/platform/s5p/s5p_cec.c index 028a09a7531e..102f1af01000 100644 --- a/drivers/media/cec/platform/s5p/s5p_cec.c +++ b/drivers/media/cec/platform/s5p/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