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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 D0F44C2B9F7 for ; Mon, 24 May 2021 15:01:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B5A2C61241 for ; Mon, 24 May 2021 15:01:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233562AbhEXPDA (ORCPT ); Mon, 24 May 2021 11:03:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:34168 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234185AbhEXO46 (ORCPT ); Mon, 24 May 2021 10:56:58 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8D4EF61449; Mon, 24 May 2021 14:49:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621867753; bh=bPE/bkTwbqPn4/j/eEHApYSL+2En6euIwbjsMON+rxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jQyrxcMjUKH4Z+QEEYaqaE1+XIdm3T1nZzaCbOLViaAhgdI0n9MXPavjmlFwbWDwX UYM8tQoqFkDbwIdxPXEWvlMLCupyiL0lnPAL0QyPGGLjtprXq+USaGQOGa6F3JM62N UAxrfoZxl7BvRXQcxzm1eEWpA80wAHptE337olLikwkVflrjwm5ivTNeR5LQsJ3nc3 chaOxnKHrV03b7Q8IgizTmH21xVzF8etyqVCv3rozCJyzs62ABTm5rn0UwTacUN6op MjCDRkc89tBrRKe5v/81WcaKiNteaBc/McqqSe0sv3Fw+OK/5CWD8nwVRGKLAKWZV3 fOe7sNJ4mowfA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Anirudh Rayabharam , "David S. Miller" , Dominik Brodowski , Greg Kroah-Hartman , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 08/52] net: fujitsu: fix potential null-ptr-deref Date: Mon, 24 May 2021 10:48:18 -0400 Message-Id: <20210524144903.2498518-8-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210524144903.2498518-1-sashal@kernel.org> References: <20210524144903.2498518-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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); /* -- 2.30.2