From patchwork Mon Mar 29 07:57:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 412626 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=-19.0 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 9E84DC433C1 for ; Mon, 29 Mar 2021 08:23:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8124661554 for ; Mon, 29 Mar 2021 08:23:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232828AbhC2IXV (ORCPT ); Mon, 29 Mar 2021 04:23:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:38360 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233270AbhC2IVT (ORCPT ); Mon, 29 Mar 2021 04:21:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B099E61554; Mon, 29 Mar 2021 08:21:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617006079; bh=Qa5G5wdax085QRuIxKwFZtL3LCLuobDr38WuPDQeiR0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lJ3uKEXdlEjek0FAz7wLLxUaEE05HSRjDwk6icjzHmXUv6t3q28W/MACg2AmKNdcf iRSnWgGyqxZNNR2Vpn22IEEUaRVWDztwJKf1gCKBErxiaRlKzNxhYpyDkEpwJZ3OL+ slUKiK3aXItIeS88QlLYO9+nw25HNlRD87/d6hec= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lv Yunlong , "David S. Miller" , Sasha Levin Subject: [PATCH 5.10 111/221] net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template Date: Mon, 29 Mar 2021 09:57:22 +0200 Message-Id: <20210329075632.916173766@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075629.172032742@linuxfoundation.org> References: <20210329075629.172032742@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Lv Yunlong [ Upstream commit db74623a3850db99cb9692fda9e836a56b74198d ] In qlcnic_83xx_get_minidump_template, fw_dump->tmpl_hdr was freed by vfree(). But unfortunately, it is used when extended is true. Fixes: 7061b2bdd620e ("qlogic: Deletion of unnecessary checks before two function calls") Signed-off-by: Lv Yunlong Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c index 7760a3394e93..7ecb3dfe30bd 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c @@ -1425,6 +1425,7 @@ void qlcnic_83xx_get_minidump_template(struct qlcnic_adapter *adapter) if (fw_dump->tmpl_hdr == NULL || current_version > prev_version) { vfree(fw_dump->tmpl_hdr); + fw_dump->tmpl_hdr = NULL; if (qlcnic_83xx_md_check_extended_dump_capability(adapter)) extended = !qlcnic_83xx_extend_md_capab(adapter); @@ -1443,6 +1444,8 @@ void qlcnic_83xx_get_minidump_template(struct qlcnic_adapter *adapter) struct qlcnic_83xx_dump_template_hdr *hdr; hdr = fw_dump->tmpl_hdr; + if (!hdr) + return; hdr->drv_cap_mask = 0x1f; fw_dump->cap_mask = 0x1f; dev_info(&pdev->dev,