From patchwork Mon May 31 13:14:13 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: 451240 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, URIBL_BLOCKED, 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 47E5CC47083 for ; Mon, 31 May 2021 13:35:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C0CD61935 for ; Mon, 31 May 2021 13:35:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232195AbhEaNgw (ORCPT ); Mon, 31 May 2021 09:36:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:39104 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232281AbhEaNdW (ORCPT ); Mon, 31 May 2021 09:33:22 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C540061436; Mon, 31 May 2021 13:24:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622467467; bh=bPE/bkTwbqPn4/j/eEHApYSL+2En6euIwbjsMON+rxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0wIJyeF6z53yWYCxQb01BTtwL+xysh7HWxAcQ9dYOoIJ7O6K6Q4yTiWOWyrqJsfAz hVuD+B6GyI1h5tGpF5FCVLgaswvpYlnISmSAS7ycp5dc93QAWXsW3PyV0wbgbF/fOS edlqwRwb2fb8gNe4vwaVxyAxZD5R/mUSzT51NFX8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "David S. Miller" , Dominik Brodowski , Anirudh Rayabharam , Sasha Levin Subject: [PATCH 4.19 077/116] net: fujitsu: fix potential null-ptr-deref Date: Mon, 31 May 2021 15:14:13 +0200 Message-Id: <20210531130642.766712233@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210531130640.131924542@linuxfoundation.org> References: <20210531130640.131924542@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Anirudh Rayabharam [ Upstream commit 52202be1cd996cde6e8969a128dc27ee45a7cb5e ] In fmvj18x_get_hwinfo(), if ioremap fails there will be NULL pointer deref. To fix this, check the return value of ioremap and return -1 to the caller in case of failure. Cc: "David S. Miller" Acked-by: Dominik Brodowski Signed-off-by: Anirudh Rayabharam Link: https://lore.kernel.org/r/20210503115736.2104747-16-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/net/ethernet/fujitsu/fmvj18x_cs.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/fujitsu/fmvj18x_cs.c b/drivers/net/ethernet/fujitsu/fmvj18x_cs.c index a69cd19a55ae..b8fc9bbeca2c 100644 --- a/drivers/net/ethernet/fujitsu/fmvj18x_cs.c +++ b/drivers/net/ethernet/fujitsu/fmvj18x_cs.c @@ -547,6 +547,11 @@ static int fmvj18x_get_hwinfo(struct pcmcia_device *link, u_char *node_id) return -1; base = ioremap(link->resource[2]->start, resource_size(link->resource[2])); + if (!base) { + pcmcia_release_window(link, link->resource[2]); + return -1; + } + pcmcia_map_mem_page(link, link->resource[2], 0); /*