From patchwork Mon May 24 15:26:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 448013 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 9EBD5C2B9F8 for ; Mon, 24 May 2021 15:52:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 828C661417 for ; Mon, 24 May 2021 15:52:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234719AbhEXPxr (ORCPT ); Mon, 24 May 2021 11:53:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:38928 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233454AbhEXPu4 (ORCPT ); Mon, 24 May 2021 11:50:56 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E0A896141F; Mon, 24 May 2021 15:38:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621870712; bh=8Fc8KHRbYELJMHUzT3bl6rJhu3JG5Bk4W8LjYl8wVKM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vESSRH9AY0r3P8HVewTHJydJu7IJmLKDIxzTz0zGqTeGJa+KHJeFFVpr25VICKFyw cLVMGsMPLJVN8ZEa2X5n4Jx6hhfihJfXm3eX/04Ytj6xpUc60XE+hcyG9MdgY1mrzG EjfIke401ggRISsDCUnKe+J0YVUBTm8I6VcCbgaA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Aditya Pakki , "David S. Miller" Subject: [PATCH 5.4 56/71] Revert "qlcnic: Avoid potential NULL pointer dereference" Date: Mon, 24 May 2021 17:26:02 +0200 Message-Id: <20210524152328.278273377@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210524152326.447759938@linuxfoundation.org> References: <20210524152326.447759938@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Greg Kroah-Hartman commit b95b57dfe7a142bf2446548eb7f49340fd73e78b upstream. This reverts commit 5bf7295fe34a5251b1d241b9736af4697b590670. Because of recent interactions with developers from @umn.edu, all commits from them have been recently re-reviewed to ensure if they were correct or not. Upon review, this commit was found to be incorrect for the reasons below, so it must be reverted. It will be fixed up "correctly" in a later kernel change. This commit does not properly detect if an error happens because the logic after this loop will not detect that there was a failed allocation. Cc: Aditya Pakki Cc: David S. Miller Fixes: 5bf7295fe34a ("qlcnic: Avoid potential NULL pointer dereference") Cc: stable Link: https://lore.kernel.org/r/20210503115736.2104747-25-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c | 2 -- 1 file changed, 2 deletions(-) --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c @@ -1048,8 +1048,6 @@ int qlcnic_do_lb_test(struct qlcnic_adap for (i = 0; i < QLCNIC_NUM_ILB_PKT; i++) { skb = netdev_alloc_skb(adapter->netdev, QLCNIC_ILB_PKT_SIZE); - if (!skb) - break; qlcnic_create_loopback_buff(skb->data, adapter->mac_addr); skb_put(skb, QLCNIC_ILB_PKT_SIZE); adapter->ahw->diag_cnt = 0;