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=-12.8 required=3.0 tests=BAYES_00,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 591D5C433E3 for ; Mon, 17 Aug 2020 18:08:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38E2D2072E for ; Mon, 17 Aug 2020 18:08:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597687724; bh=Fwo0FDK2/w9SWFeNDQy6dcWQ1EaURSRHtoIZWGQM2A4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wasybVkeDsBpkrqr+0f7XE+yjZkJORQwiHGBAYSQelfNM5iAP8cYjdsn+m7sPCut1 JlBuZkXins7wjvhskzD8gT2+Mge4fSb0zHIN1uXYplkJll4rocpGXJyEiizBmSj/9p mUs1xAGwooQQwuAnlu/7LmOrZR1bb3tg1/qiw/mk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390358AbgHQSIk (ORCPT ); Mon, 17 Aug 2020 14:08:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:55706 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388434AbgHQQIM (ORCPT ); Mon, 17 Aug 2020 12:08:12 -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 C581820888; Mon, 17 Aug 2020 16:08:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597680488; bh=Fwo0FDK2/w9SWFeNDQy6dcWQ1EaURSRHtoIZWGQM2A4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XlGz7FABQH8uMsim3xjRbCU2hLOK77aftJe19CjguRFHBrbW9YWZd1T0xz47teWQ+ UoJqvZBmGUbCVYolozsPcUuEdgjS5CgubgOa6gn91tCUoY2+LYdGpLABcR+RMDaT9g k6shoiSnxmnuxOo+mzHu6VkL8zXKkAEY2rtgMXgc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Florinel Iordache , "David S. Miller" , Sasha Levin Subject: [PATCH 5.4 207/270] fsl/fman: check dereferencing null pointer Date: Mon, 17 Aug 2020 17:16:48 +0200 Message-Id: <20200817143806.100230362@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143755.807583758@linuxfoundation.org> References: <20200817143755.807583758@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: Florinel Iordache [ Upstream commit cc5d229a122106733a85c279d89d7703f21e4d4f ] Add a safe check to avoid dereferencing null pointer Fixes: 57ba4c9b56d8 ("fsl/fman: Add FMan MAC support") Signed-off-by: Florinel Iordache Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/freescale/fman/fman_dtsec.c | 4 ++-- drivers/net/ethernet/freescale/fman/fman_memac.c | 2 +- drivers/net/ethernet/freescale/fman/fman_tgec.c | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/freescale/fman/fman_dtsec.c b/drivers/net/ethernet/freescale/fman/fman_dtsec.c index 1ca543ac8f2cd..d2de9ea80c43f 100644 --- a/drivers/net/ethernet/freescale/fman/fman_dtsec.c +++ b/drivers/net/ethernet/freescale/fman/fman_dtsec.c @@ -1205,7 +1205,7 @@ int dtsec_del_hash_mac_address(struct fman_mac *dtsec, enet_addr_t *eth_addr) list_for_each(pos, &dtsec->multicast_addr_hash->lsts[bucket]) { hash_entry = ETH_HASH_ENTRY_OBJ(pos); - if (hash_entry->addr == addr) { + if (hash_entry && hash_entry->addr == addr) { list_del_init(&hash_entry->node); kfree(hash_entry); break; @@ -1218,7 +1218,7 @@ int dtsec_del_hash_mac_address(struct fman_mac *dtsec, enet_addr_t *eth_addr) list_for_each(pos, &dtsec->unicast_addr_hash->lsts[bucket]) { hash_entry = ETH_HASH_ENTRY_OBJ(pos); - if (hash_entry->addr == addr) { + if (hash_entry && hash_entry->addr == addr) { list_del_init(&hash_entry->node); kfree(hash_entry); break; diff --git a/drivers/net/ethernet/freescale/fman/fman_memac.c b/drivers/net/ethernet/freescale/fman/fman_memac.c index 08f8b36779ea4..9088b4f4b4b87 100644 --- a/drivers/net/ethernet/freescale/fman/fman_memac.c +++ b/drivers/net/ethernet/freescale/fman/fman_memac.c @@ -985,7 +985,7 @@ int memac_del_hash_mac_address(struct fman_mac *memac, enet_addr_t *eth_addr) list_for_each(pos, &memac->multicast_addr_hash->lsts[hash]) { hash_entry = ETH_HASH_ENTRY_OBJ(pos); - if (hash_entry->addr == addr) { + if (hash_entry && hash_entry->addr == addr) { list_del_init(&hash_entry->node); kfree(hash_entry); break; diff --git a/drivers/net/ethernet/freescale/fman/fman_tgec.c b/drivers/net/ethernet/freescale/fman/fman_tgec.c index f75b9c11b2d29..ac5a281e0ec3b 100644 --- a/drivers/net/ethernet/freescale/fman/fman_tgec.c +++ b/drivers/net/ethernet/freescale/fman/fman_tgec.c @@ -630,7 +630,7 @@ int tgec_del_hash_mac_address(struct fman_mac *tgec, enet_addr_t *eth_addr) list_for_each(pos, &tgec->multicast_addr_hash->lsts[hash]) { hash_entry = ETH_HASH_ENTRY_OBJ(pos); - if (hash_entry->addr == addr) { + if (hash_entry && hash_entry->addr == addr) { list_del_init(&hash_entry->node); kfree(hash_entry); break; -- 2.25.1