From patchwork Mon Jun 20 07:50:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ladislav Michl X-Patchwork-Id: 637843 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 3rY3203PqHz9t0q for ; Mon, 20 Jun 2016 17:50:48 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 1C56DA7660; Mon, 20 Jun 2016 09:50:47 +0200 (CEST) Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SuTK8Xve60D0; Mon, 20 Jun 2016 09:50:46 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 76D63A7564; Mon, 20 Jun 2016 09:50:46 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 4F6C9A7564 for ; Mon, 20 Jun 2016 09:50:43 +0200 (CEST) Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 4tihd_1cSMkC for ; Mon, 20 Jun 2016 09:50:43 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from cvs.linux-mips.org (eddie.linux-mips.org [148.251.95.138]) by theia.denx.de (Postfix) with ESMTP id 1D7A2A752D for ; Mon, 20 Jun 2016 09:50:41 +0200 (CEST) Received: (from localhost user: 'ladis' uid#1021 fake: STDIN (ladis@eddie.linux-mips.org)) by eddie.linux-mips.org id S27041677AbcFTHukwfQ7p (ORCPT ); Mon, 20 Jun 2016 09:50:40 +0200 Date: Mon, 20 Jun 2016 09:50:37 +0200 From: Ladislav Michl To: u-boot@lists.denx.de Message-ID: <20160620075037.GD1538@localhost.localdomain> References: <20160620074707.GA1268@localhost.localdomain> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20160620074707.GA1268@localhost.localdomain> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: Scott Wood , Tom Rini Subject: [U-Boot] [PATCH 4/6] cmd: mtdparts: fix mtdparts variable presence confusion in mtdparts_init X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.15 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" A private buffer is used to read mtdparts variable from non-relocated environment. A pointer to that buffer is returned unconditionally, confusing later test for variable presence in the environment. Fix it by returning NULL when getenv_f fails. Signed-off-by: Ladislav Michl diff --git a/cmd/mtdparts.c b/cmd/mtdparts.c index 44b2c3a..3a88a10 100644 --- a/cmd/mtdparts.c +++ b/cmd/mtdparts.c @@ -1720,11 +1720,13 @@ int mtdparts_init(void) * before the env is relocated, then we need to use our own stack * buffer. gd->env_buf will be too small. */ - if (gd->flags & GD_FLG_ENV_READY) { + if (gd->flags & GD_FLG_ENV_READY) parts = getenv("mtdparts"); - } else { - parts = tmp_parts; - getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN); + else { + if (getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN) != -1) + parts = tmp_parts; + else + parts = NULL; } current_partition = getenv("partition");