From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B80215CAB for ; Tue, 8 Nov 2022 13:41:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6DAD0C433C1; Tue, 8 Nov 2022 13:41:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667914883; bh=qfPtwSHuxdqmU3RDuO0CxE1LqMmqchKl638v/0OFALY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VjJ/bRPEXYYIcm+RdnU8Wf7TiH3PXDdH02UwXPxnKpg1KDbNZmIsDpvtfh3nahK5q 2M+w0zCKB9e59P2GaZ9Fe0c1hZ8bhKfuYtCfomZjazWtPEikaasdpOU9nxPgLETvlv CUyThZlqJMCWLNQNtAhrS4Q2W66HCO+aRwz5TkCg= 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 4.9 17/30] media: s5p_cec: limit msg.len to CEC_MAX_MSG_SIZE Date: Tue, 8 Nov 2022 14:39:05 +0100 Message-Id: <20221108133327.348515524@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221108133326.715586431@linuxfoundation.org> References: <20221108133326.715586431@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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