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=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 B64BAFA372C for ; Fri, 8 Nov 2019 13:03:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 88CB5206A3 for ; Fri, 8 Nov 2019 13:03:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=rasmusvillemoes.dk header.i=@rasmusvillemoes.dk header.b="XVACoOOu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731517AbfKHNDD (ORCPT ); Fri, 8 Nov 2019 08:03:03 -0500 Received: from mail-lf1-f68.google.com ([209.85.167.68]:34255 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730799AbfKHNCZ (ORCPT ); Fri, 8 Nov 2019 08:02:25 -0500 Received: by mail-lf1-f68.google.com with SMTP id f5so4431846lfp.1 for ; Fri, 08 Nov 2019 05:02:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rasmusvillemoes.dk; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=2QjvBFt/Ahp0rywmkIDhfkZ7dAuBAKpWua4zqIA54R0=; b=XVACoOOuXlxl4Cy3V/J8sGSeCCFw8ZKOKZ7FqB/K3JgCxUCJ1xCj/Mqawr8e2qIujx O7k1zBR8675/UVFNVWJud7B7gGy4eRxvGFDaQiIdBxLuh/UvxbGJ2jiZIbbPNPtq2kf0 ZABUDJvpYchPCeIhdPhVBPmgejb6251Cuy5iE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=2QjvBFt/Ahp0rywmkIDhfkZ7dAuBAKpWua4zqIA54R0=; b=VRhwAVMXgidrgP9FUMsPJR63Uk2Tzk0X/msf1a/rcHgpVtFYskj4djQKuWkb/pgdj0 LO/XQwDAu07+dLv35XyFQaaUhRCbRP7rm6WWvbfgQQIzRSOqFWUcwQuGIrpxGuExZzRF 2OtXky2FGwB8t6SUj8pkIxWHbygSjhYtBlrIyTyXFajW+yqJAHsogyc4emQxJ3k+ZMWi 4eQdo2Dw+mI84GidphlLFe/fw/CksiBqbKBZOwIBwVRaRaRmHnlQsUZo2Jv/58wV7lmQ IlS88JMNApo2A4S0Oa83jFj5HPukkfPbRgFAqxdeGeRzqZZvNozopciVhwiuJ6PuCMdR /LfA== X-Gm-Message-State: APjAAAX/XiLwX4H1yNK5tFtqaj2IvmMXYOAQm6cWxvO920ZWa9HBC7aO KAK6zphIO3ob5U1J7zS0xXkaAQ== X-Google-Smtp-Source: APXvYqwScoFAHiImQMnrTZk87e9zBJh2EkwdHqWoi9bG9XRi4pfN3RXUv9ZB5CXwEIsQqOH7j53G/g== X-Received: by 2002:a19:820e:: with SMTP id e14mr6605403lfd.29.1573218143917; Fri, 08 Nov 2019 05:02:23 -0800 (PST) Received: from prevas-ravi.prevas.se ([81.216.59.226]) by smtp.gmail.com with ESMTPSA id d28sm2454725lfn.33.2019.11.08.05.02.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Nov 2019 05:02:23 -0800 (PST) From: Rasmus Villemoes To: Qiang Zhao , Li Yang , Christophe Leroy Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Scott Wood , Rasmus Villemoes , netdev@vger.kernel.org Subject: [PATCH v4 45/47] net/wan/fsl_ucc_hdlc: reject muram offsets above 64K Date: Fri, 8 Nov 2019 14:01:21 +0100 Message-Id: <20191108130123.6839-46-linux@rasmusvillemoes.dk> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191108130123.6839-1-linux@rasmusvillemoes.dk> References: <20191108130123.6839-1-linux@rasmusvillemoes.dk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: Rasmus Villemoes --- 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 8d13586bb774..f029eaa7cfc0 100644 --- a/drivers/net/wan/fsl_ucc_hdlc.c +++ b/drivers/net/wan/fsl_ucc_hdlc.c @@ -245,6 +245,11 @@ 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); -- 2.23.0