From patchwork Thu Jan 2 22:06:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 234490 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 1B8ADC3276C for ; Thu, 2 Jan 2020 22:58:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E29082253D for ; Thu, 2 Jan 2020 22:58:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578005924; bh=P3a/ZEkweCnG571B9JxdD9lRevBt7k9vKFOiEEnafLg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=o4txtlCfUTZ5nP2+Hm6Ins+04uw3qNqGOfLJRV4rL3VB0NQydSpSQlexKZA/ObiNm CdLZF+Y8NtTGps0uo0OtQqMOo6EyBmpwNOvZ4iIWIhrGA4JlSAdGP1ViKdGOF63LWN pagX+1omaV29PUqb8UZAI483a4efel1k090CgYEM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728035AbgABWPY (ORCPT ); Thu, 2 Jan 2020 17:15:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:56220 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727134AbgABWPY (ORCPT ); Thu, 2 Jan 2020 17:15:24 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A178C24649; Thu, 2 Jan 2020 22:15:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578003323; bh=P3a/ZEkweCnG571B9JxdD9lRevBt7k9vKFOiEEnafLg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VYny6OlfeiX0VvqWuYEYiKca7ub+mtW8iCbxidyCY6bacKZjgQVYL5y79+Ekis+do oUN+STMaEqUfr/f3prTSAhFdR9UUDPC6lmoRz/zbewf1wdBXbyk9qYFW0B9pHqbQs3 r60PGbDpxZe6UmWzvfSj+HkrjCHZLd6dWvlkqz84= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Erhard Furtner , Michael Ellerman , Tyrel Datwyler , Rob Herring , Sasha Levin Subject: [PATCH 5.4 112/191] of: unittest: fix memory leak in attach_node_and_children Date: Thu, 2 Jan 2020 23:06:34 +0100 Message-Id: <20200102215841.878154675@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102215829.911231638@linuxfoundation.org> References: <20200102215829.911231638@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Erhard Furtner [ Upstream commit 2aacace6dbbb6b6ce4e177e6c7ea901f389c0472 ] In attach_node_and_children memory is allocated for full_name via kasprintf. If the condition of the 1st if is not met the function returns early without freeing the memory. Add a kfree() to fix that. This has been detected with kmemleak: Link: https://bugzilla.kernel.org/show_bug.cgi?id=205327 It looks like the leak was introduced by this commit: Fixes: 5babefb7f7ab ("of: unittest: allow base devicetree to have symbol metadata") Signed-off-by: Erhard Furtner Reviewed-by: Michael Ellerman Reviewed-by: Tyrel Datwyler Signed-off-by: Rob Herring Signed-off-by: Sasha Levin --- drivers/of/unittest.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 92e895d86458..ca7823eef2b4 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -1146,8 +1146,10 @@ static void attach_node_and_children(struct device_node *np) full_name = kasprintf(GFP_KERNEL, "%pOF", np); if (!strcmp(full_name, "/__local_fixups__") || - !strcmp(full_name, "/__fixups__")) + !strcmp(full_name, "/__fixups__")) { + kfree(full_name); return; + } dup = of_find_node_by_path(full_name); kfree(full_name);