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 A5C1DFA3745 for ; Tue, 1 Nov 2022 11:36:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230480AbiKALgt (ORCPT ); Tue, 1 Nov 2022 07:36:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231255AbiKALgL (ORCPT ); Tue, 1 Nov 2022 07:36:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A14731D0DA; Tue, 1 Nov 2022 04:31:44 -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 dfw.source.kernel.org (Postfix) with ESMTPS id E48FA615EA; Tue, 1 Nov 2022 11:31:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B3974C433C1; Tue, 1 Nov 2022 11:31:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667302297; bh=qau5o1gWNRT7hnU7BJTNSR3XmPp6afM6aLwWeSom3Jk=; h=From:To:Cc:Subject:Date:From; b=vG1n36Z+zfXms4XOszO4/dT7AzifDI4LKwXDQZIIM5ZedK+nQXEmxLpZQkv2bMCrU b5ZYGe+HvJ6CqReMLkrB5QFkHlXb+jrihWjEGdcQtWxqSYy2gVGKU6cdmrMOu51CRJ oqkZ8WokaHNKawC6ZpU4PsfFyByPvDAT50dahO3S0BVsF0QoVgYf+SRiaBWu+l7IsY Fz87KQA2j+1PQoGS/ClxV0ibuBWM4y8LCe1fm3XErUUqXuoUmkdRVPEwtZDq2envEh y71A/WuMOnaFytXYar4XH7xrK+7MhQ/43FQm8ALF6cZNRQntzaKK17X7ni5ZxkvGLs VvRuA3/frZnGQ== 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 4.14 1/4] media: s5p_cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 1 Nov 2022 07:31:30 -0400 Message-Id: <20221101113135.800983-1-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: stable@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