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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 09FD1C3F35A for ; Thu, 27 Feb 2020 13:48:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CABCA21D7E for ; Thu, 27 Feb 2020 13:48:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582811322; bh=UO55tRwkGBNUjjrj++FD29xVqIkGuWGsESnDe4rEb70=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1OiHCxG6Nj78Z7BwECUstVE1AJHpaOjfhnh2uqyv9uzsLfBM+yTB9KdEw+l7lZf1Z uLcGIiLPuuWXvNka+cZzs0RzMMhO5iwejHUCu+jt4k+7UsmRhv1Ek8f6HOi790ba5T 4vKZarpH8bo3vvH8wOaJ+cBTV3IQcJnp/kDI2Piw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730914AbgB0Nsl (ORCPT ); Thu, 27 Feb 2020 08:48:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:45496 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730865AbgB0Nsi (ORCPT ); Thu, 27 Feb 2020 08:48:38 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C4DE224688; Thu, 27 Feb 2020 13:48:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582811318; bh=UO55tRwkGBNUjjrj++FD29xVqIkGuWGsESnDe4rEb70=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IglicqJmCDf0rJgutXNubwD2kfjyluIk9fZkKf785Ev4MS5+gRjW11urr91CfW795 HRv2XluVWhjeFkWrdmXAVnCUAlns0uzfUQl9rL8/gsxhJABO79N3YRTQUwCRU2iGsm EX3Gbp33iabOQeubw+RV07fQTvwzNu7WJA70B32g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qiang Zhao , Timur Tabi , Rasmus Villemoes , "David S. Miller" , Li Yang , Sasha Levin Subject: [PATCH 4.9 047/165] net/wan/fsl_ucc_hdlc: reject muram offsets above 64K Date: Thu, 27 Feb 2020 14:35:21 +0100 Message-Id: <20200227132238.056381768@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132230.840899170@linuxfoundation.org> References: <20200227132230.840899170@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rasmus Villemoes [ Upstream commit 148587a59f6b85831695e0497d9dd1af5f0495af ] Qiang Zhao points out that these offsets get written to 16-bit registers, and there are some QE platforms with more than 64K muram. So it is possible that qe_muram_alloc() gives us an allocation that can't actually be used by the hardware, so detect and reject that. Reported-by: Qiang Zhao Reviewed-by: Timur Tabi Signed-off-by: Rasmus Villemoes Acked-by: David S. Miller Signed-off-by: Li Yang Signed-off-by: Sasha Levin --- drivers/net/wan/fsl_ucc_hdlc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c index af85a1b3135e2..87bf05a81db50 100644 --- a/drivers/net/wan/fsl_ucc_hdlc.c +++ b/drivers/net/wan/fsl_ucc_hdlc.c @@ -209,6 +209,11 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) ret = -ENOMEM; goto free_riptr; } + if (riptr != (u16)riptr || tiptr != (u16)tiptr) { + dev_err(priv->dev, "MURAM allocation out of addressable range\n"); + ret = -ENOMEM; + goto free_tiptr; + } /* Set RIPTR, TIPTR */ iowrite16be(riptr, &priv->ucc_pram->riptr); -- 2.20.1