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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 485F0C2BA2B for ; Sat, 11 Apr 2020 12:22:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 138E220644 for ; Sat, 11 Apr 2020 12:22:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607730; bh=V95yCoTcpXvKvc9AZwVut5NcTNGJwYI7B6vPWp1OYV4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=pYal6AP8eG9ST2jl70ApzD4iOsgIkPG3KmvFHfvcvdTwKTYjOs47pQlIHetsgWGKd Obfr3fbqJPtEy6pRDv/qkEeMRHhvXlBcvIjdQHvqp0/w2rbMA87f7U6mJw5v4lHjKB 73Nrq3X5kl7Ou20tcsUSjVdlOTy+AJoIkb7so5pw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729173AbgDKMVi (ORCPT ); Sat, 11 Apr 2020 08:21:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:57830 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728838AbgDKMVa (ORCPT ); Sat, 11 Apr 2020 08:21:30 -0400 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 DBACB2084D; Sat, 11 Apr 2020 12:21:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607690; bh=V95yCoTcpXvKvc9AZwVut5NcTNGJwYI7B6vPWp1OYV4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ie1Az/YJw5pX6Ug/1Who05euvBgMHI2tBhljBs9SSQG9TWPeSQyOUuq1zgTJJBh6N 2UMgSAVBGdzdsZm0Z2IHCPl2cheAfZT2Q89Ty2ukeHNfREFGue/rh44oc+u8uzkmKV ybKjNPxkTpBbU8DzINKalY5EZfSM5cOahixN3aVk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jisheng Zhang , "David S. Miller" Subject: [PATCH 5.6 09/38] net: stmmac: dwmac1000: fix out-of-bounds mac address reg setting Date: Sat, 11 Apr 2020 14:09:46 +0200 Message-Id: <20200411115500.287772847@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200411115459.324496182@linuxfoundation.org> References: <20200411115459.324496182@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: Jisheng Zhang [ Upstream commit 3e1221acf6a8f8595b5ce354bab4327a69d54d18 ] Commit 9463c4455900 ("net: stmmac: dwmac1000: Clear unused address entries") cleared the unused mac address entries, but introduced an out-of bounds mac address register programming bug -- After setting the secondary unicast mac addresses, the "reg" value has reached netdev_uc_count() + 1, thus we should only clear address entries if (addr < perfect_addr_number) Fixes: 9463c4455900 ("net: stmmac: dwmac1000: Clear unused address entries") Signed-off-by: Jisheng Zhang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c @@ -207,7 +207,7 @@ static void dwmac1000_set_filter(struct reg++; } - while (reg <= perfect_addr_number) { + while (reg < perfect_addr_number) { writel(0, ioaddr + GMAC_ADDR_HIGH(reg)); writel(0, ioaddr + GMAC_ADDR_LOW(reg)); reg++;