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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,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 7ECFFC38A29 for ; Wed, 15 Apr 2020 11:54:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 52369206A2 for ; Wed, 15 Apr 2020 11:54:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586951676; bh=ZdQpdMXAuKXWa7gWPIpjYwpVyeQdiVktFAnHfPKPAMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1bTdpy94fppQd0HJpo0cTojPuysV65oKYpK6pJQ0YZpZXSAhmSuP2SioMKC+HPGIo roS3EdKkGqKct0nJ5hhBuMOUKZjfLpEoi+VOrZlvP9RFhcJUeuSApsTiBwy/CWufxn nTMuWalRzv5Q+QIuwBW9p32g1C9tGmXmlBkzrgoI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2897868AbgDOLy2 (ORCPT ); Wed, 15 Apr 2020 07:54:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:39280 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2409181AbgDOLpe (ORCPT ); Wed, 15 Apr 2020 07:45:34 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 89DDE20768; Wed, 15 Apr 2020 11:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586951133; bh=ZdQpdMXAuKXWa7gWPIpjYwpVyeQdiVktFAnHfPKPAMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GcATTDqVReMMCGAKNSShEXVojRmSdAHa/S4R+atCH0YTNtLwjndPj+/FSu+IXVvkx LN/xS3e5jlU5kBIgyXAVyg6YDG7mBkqabMDlN0IuO5Ar9XU6Wp8jYsAoO52BGgwaOW UbfvPWozIQi8X9X9vsmDfiLl5NnDEy600sMlgUOA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Chuanhong Guo , Vivien Didelot , Florian Fainelli , =?UTF-8?q?Ren=C3=A9=20van=20Dorst?= , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 44/84] net: dsa: mt7530: fix null pointer dereferencing in port5 setup Date: Wed, 15 Apr 2020 07:44:01 -0400 Message-Id: <20200415114442.14166-44-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200415114442.14166-1-sashal@kernel.org> References: <20200415114442.14166-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chuanhong Guo [ Upstream commit 0452800f6db4ed0a42ffb15867c0acfd68829f6a ] The 2nd gmac of mediatek soc ethernet may not be connected to a PHY and a phy-handle isn't always available. Unfortunately, mt7530 dsa driver assumes that the 2nd gmac is always connected to switch port 5 and setup mt7530 according to phy address of 2nd gmac node, causing null pointer dereferencing when phy-handle isn't defined in dts. This commit fix this setup code by checking return value of of_parse_phandle before using it. Fixes: 38f790a80560 ("net: dsa: mt7530: Add support for port 5") Signed-off-by: Chuanhong Guo Reviewed-by: Vivien Didelot Reviewed-by: Florian Fainelli Tested-by: René van Dorst Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/dsa/mt7530.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index e0e932f0aed1e..8071c3fa3fb7c 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -1353,6 +1353,9 @@ mt7530_setup(struct dsa_switch *ds) continue; phy_node = of_parse_phandle(mac_np, "phy-handle", 0); + if (!phy_node) + continue; + if (phy_node->parent == priv->dev->of_node->parent) { interface = of_get_phy_mode(mac_np); id = of_mdio_parse_addr(ds->dev, phy_node); -- 2.20.1 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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 2A711C38A29 for ; Wed, 15 Apr 2020 11:50:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 019FD20732 for ; Wed, 15 Apr 2020 11:50:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Gh6u7gLa"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="GcATTDqV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 019FD20732 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Q7bwl1DFQ54wzpWHdebW/miIL7GZgAGEhzqvVhJq1VQ=; b=Gh6u7gLaPjc6Rr QG/TWljsKezXWv1FhlNuAbSAcOMPeNXRncyEtFcqWNGTcLpacfOZTMiKV8adacPo901V5SJUiyCCA qXPbpjTxQOuSp5wZek9V0cREOFrmS2DxZblM7GWF3Qd5a5wvNmbYk6xTxAfdU7jLN+LSlEos+Fi6h 14JsnUZ8xiFSbOILVf/Z2ZkB4L3zFXBe+Z9WraZxN9E84nctOJPwFg6dJT6PJLLhQBFSF+ypaBTWg LeNuH0AO3J6CddhWDT98Dv/qWb3nV2dJsmUQUIHc9fiCwob61nRsEAMD30zoc+xKxCetW6d3QtFqA yOCR/Dl9SDdyNURONXYQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jOgYf-0001aU-Em; Wed, 15 Apr 2020 11:50:21 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jOgU2-0004J3-HH; Wed, 15 Apr 2020 11:45:36 +0000 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 89DDE20768; Wed, 15 Apr 2020 11:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586951133; bh=ZdQpdMXAuKXWa7gWPIpjYwpVyeQdiVktFAnHfPKPAMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GcATTDqVReMMCGAKNSShEXVojRmSdAHa/S4R+atCH0YTNtLwjndPj+/FSu+IXVvkx LN/xS3e5jlU5kBIgyXAVyg6YDG7mBkqabMDlN0IuO5Ar9XU6Wp8jYsAoO52BGgwaOW UbfvPWozIQi8X9X9vsmDfiLl5NnDEy600sMlgUOA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 44/84] net: dsa: mt7530: fix null pointer dereferencing in port5 setup Date: Wed, 15 Apr 2020 07:44:01 -0400 Message-Id: <20200415114442.14166-44-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200415114442.14166-1-sashal@kernel.org> References: <20200415114442.14166-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200415_044534_637842_5CF1DA70 X-CRM114-Status: GOOD ( 10.89 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , Florian Fainelli , netdev@vger.kernel.org, "David S . 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Wed, 15 Apr 2020 11:45:36 +0000 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 89DDE20768; Wed, 15 Apr 2020 11:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586951133; bh=ZdQpdMXAuKXWa7gWPIpjYwpVyeQdiVktFAnHfPKPAMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GcATTDqVReMMCGAKNSShEXVojRmSdAHa/S4R+atCH0YTNtLwjndPj+/FSu+IXVvkx LN/xS3e5jlU5kBIgyXAVyg6YDG7mBkqabMDlN0IuO5Ar9XU6Wp8jYsAoO52BGgwaOW UbfvPWozIQi8X9X9vsmDfiLl5NnDEy600sMlgUOA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 44/84] net: dsa: mt7530: fix null pointer dereferencing in port5 setup Date: Wed, 15 Apr 2020 07:44:01 -0400 Message-Id: <20200415114442.14166-44-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200415114442.14166-1-sashal@kernel.org> References: <20200415114442.14166-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200415_044534_637842_5CF1DA70 X-CRM114-Status: GOOD ( 10.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , Florian Fainelli , netdev@vger.kernel.org, "David S . Miller" , =?UTF-8?q?Ren=C3=A9=20van=20Dorst?= , linux-mediatek@lists.infradead.org, Chuanhong Guo , Vivien Didelot , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org RnJvbTogQ2h1YW5ob25nIEd1byA8Z2NoOTgxMjEzQGdtYWlsLmNvbT4KClsgVXBzdHJlYW0gY29t bWl0IDA0NTI4MDBmNmRiNGVkMGE0MmZmYjE1ODY3YzBhY2ZkNjg4MjlmNmEgXQoKVGhlIDJuZCBn bWFjIG9mIG1lZGlhdGVrIHNvYyBldGhlcm5ldCBtYXkgbm90IGJlIGNvbm5lY3RlZCB0byBhIFBI WQphbmQgYSBwaHktaGFuZGxlIGlzbid0IGFsd2F5cyBhdmFpbGFibGUuClVuZm9ydHVuYXRlbHks IG10NzUzMCBkc2EgZHJpdmVyIGFzc3VtZXMgdGhhdCB0aGUgMm5kIGdtYWMgaXMgYWx3YXlzCmNv bm5lY3RlZCB0byBzd2l0Y2ggcG9ydCA1IGFuZCBzZXR1cCBtdDc1MzAgYWNjb3JkaW5nIHRvIHBo eSBhZGRyZXNzCm9mIDJuZCBnbWFjIG5vZGUsIGNhdXNpbmcgbnVsbCBwb2ludGVyIGRlcmVmZXJl bmNpbmcgd2hlbiBwaHktaGFuZGxlCmlzbid0IGRlZmluZWQgaW4gZHRzLgpUaGlzIGNvbW1pdCBm aXggdGhpcyBzZXR1cCBjb2RlIGJ5IGNoZWNraW5nIHJldHVybiB2YWx1ZSBvZgpvZl9wYXJzZV9w aGFuZGxlIGJlZm9yZSB1c2luZyBpdC4KCkZpeGVzOiAzOGY3OTBhODA1NjAgKCJuZXQ6IGRzYTog bXQ3NTMwOiBBZGQgc3VwcG9ydCBmb3IgcG9ydCA1IikKU2lnbmVkLW9mZi1ieTogQ2h1YW5ob25n IEd1byA8Z2NoOTgxMjEzQGdtYWlsLmNvbT4KUmV2aWV3ZWQtYnk6IFZpdmllbiBEaWRlbG90IDx2 aXZpZW4uZGlkZWxvdEBnbWFpbC5jb20+ClJldmlld2VkLWJ5OiBGbG9yaWFuIEZhaW5lbGxpIDxm LmZhaW5lbGxpQGdtYWlsLmNvbT4KVGVzdGVkLWJ5OiBSZW7DqSB2YW4gRG9yc3QgPG9wZW5zb3Vy Y2VAdmRvcnN0LmNvbT4KU2lnbmVkLW9mZi1ieTogRGF2aWQgUy4gTWlsbGVyIDxkYXZlbUBkYXZl bWxvZnQubmV0PgpTaWduZWQtb2ZmLWJ5OiBTYXNoYSBMZXZpbiA8c2FzaGFsQGtlcm5lbC5vcmc+ Ci0tLQogZHJpdmVycy9uZXQvZHNhL210NzUzMC5jIHwgMyArKysKIDEgZmlsZSBjaGFuZ2VkLCAz IGluc2VydGlvbnMoKykKCmRpZmYgLS1naXQgYS9kcml2ZXJzL25ldC9kc2EvbXQ3NTMwLmMgYi9k cml2ZXJzL25ldC9kc2EvbXQ3NTMwLmMKaW5kZXggZTBlOTMyZjBhZWQxZS4uODA3MWMzZmEzZmI3 YyAxMDA2NDQKLS0tIGEvZHJpdmVycy9uZXQvZHNhL210NzUzMC5jCisrKyBiL2RyaXZlcnMvbmV0 L2RzYS9tdDc1MzAuYwpAQCAtMTM1Myw2ICsxMzUzLDkgQEAgbXQ3NTMwX3NldHVwKHN0cnVjdCBk c2Ffc3dpdGNoICpkcykKIAkJCQljb250aW51ZTsKIAogCQkJcGh5X25vZGUgPSBvZl9wYXJzZV9w aGFuZGxlKG1hY19ucCwgInBoeS1oYW5kbGUiLCAwKTsKKwkJCWlmICghcGh5X25vZGUpCisJCQkJ Y29udGludWU7CisKIAkJCWlmIChwaHlfbm9kZS0+cGFyZW50ID09IHByaXYtPmRldi0+b2Zfbm9k ZS0+cGFyZW50KSB7CiAJCQkJaW50ZXJmYWNlID0gb2ZfZ2V0X3BoeV9tb2RlKG1hY19ucCk7CiAJ CQkJaWQgPSBvZl9tZGlvX3BhcnNlX2FkZHIoZHMtPmRldiwgcGh5X25vZGUpOwotLSAKMi4yMC4x CgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgt YXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQu b3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJt LWtlcm5lbAo=