From patchwork Sat Apr 11 12:09:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 228093 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,URIBL_BLOCKED,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 7AB57C2BA2B for ; Sat, 11 Apr 2020 12:13:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 524D520787 for ; Sat, 11 Apr 2020 12:13:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607212; bh=pOhhefnT3vt7QwB756HsUerLLEmN5XhypxWbbN3FghQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=FFNmhegjBMCepIREtoUzrm6tW7SDP54i4JMHLnZt4x3wNA1vBCpqBwBGh6s6qQFxb +WNm/sIiYgyBzOO4tdVAf/HJ9ZzvcVuLkEGvH2OSJOf02hz/MFmruk3P8iSvmG+Dpo FRiRaTMyPTxlklnqoTOOrb87Hcdrmnx9NozB1J6w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727796AbgDKMNa (ORCPT ); Sat, 11 Apr 2020 08:13:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:46386 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727778AbgDKMN0 (ORCPT ); Sat, 11 Apr 2020 08:13:26 -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 1C7BB20787; Sat, 11 Apr 2020 12:13:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607206; bh=pOhhefnT3vt7QwB756HsUerLLEmN5XhypxWbbN3FghQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ypMIjZzeQhq4HKrWxINijZnYf59WnvHFyG4tA6GbdEyGuQ8kCtnwrbQAf0+tQInDP rTjcHwgR4TJcfPnV406FZvt5olxK7aCRwhk/eCKPnu/eki4cDIHWdpKCLjRBZNHOzW GZEAiLpYvPyxr9O3oHJ/jsyT7/C7GvHx77wT/hAY= 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 4.14 18/38] net: stmmac: dwmac1000: fix out-of-bounds mac address reg setting Date: Sat, 11 Apr 2020 14:09:02 +0200 Message-Id: <20200411115439.765946029@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200411115437.795556138@linuxfoundation.org> References: <20200411115437.795556138@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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 @@ -218,7 +218,7 @@ 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++;