From patchwork Mon Mar 29 07:58:16 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: 411564 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 1B3D8C433F7 for ; Mon, 29 Mar 2021 08:11:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E94BC6196B for ; Mon, 29 Mar 2021 08:11:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231580AbhC2IKp (ORCPT ); Mon, 29 Mar 2021 04:10:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:53846 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232502AbhC2IKD (ORCPT ); Mon, 29 Mar 2021 04:10:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E01D261996; Mon, 29 Mar 2021 08:09:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617005400; bh=2qmzm636+u8cGdoJQcTbbGmnfV8jMSjmuYBwgIGaiQw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bd/xKwThUzxExZHYWhJsNTBGwDXFwB2TN5qO/kqlObrzjQq52dwte3LjSlYsSdf/v zloVLdKf5RWS/QnLcoXQHldI4FJ/D+a3heF+BeK86ppukWwAj+bK53n5kDgDOUKRKL a1dkU0KO4t/OeXOmwHJEmUcw2bdq33vLTCVJB+zA= 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 4.19 40/72] net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template Date: Mon, 29 Mar 2021 09:58:16 +0200 Message-Id: <20210329075611.615999689@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075610.300795746@linuxfoundation.org> References: <20210329075610.300795746@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 f34ae8c75bc5..61a39d167c8b 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c @@ -1426,6 +1426,7 @@ 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); @@ -1444,6 +1445,8 @@ 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,