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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 633B5C43441 for ; Tue, 27 Nov 2018 08:22:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 35D7820873 for ; Tue, 27 Nov 2018 08:22:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 35D7820873 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729436AbeK0TTw (ORCPT ); Tue, 27 Nov 2018 14:19:52 -0500 Received: from mail.bootlin.com ([62.4.15.54]:55217 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727745AbeK0TTv (ORCPT ); Tue, 27 Nov 2018 14:19:51 -0500 Received: by mail.bootlin.com (Postfix, from userid 110) id CB8DA20D29; Tue, 27 Nov 2018 09:22:44 +0100 (CET) Received: from bbrezillon (aaubervilliers-681-1-94-205.w90-88.abo.wanadoo.fr [90.88.35.205]) by mail.bootlin.com (Postfix) with ESMTPSA id 80F6C20745; Tue, 27 Nov 2018 09:22:34 +0100 (CET) Date: Tue, 27 Nov 2018 09:22:32 +0100 From: Boris Brezillon To: Schrempf Frieder Cc: Miquel Raynal , Richard Weinberger , "stable@vger.kernel.org" , David Woodhouse , Brian Norris , Marek Vasut , "linux-mtd@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] mtd: nand: Fix memory allocation in nanddev_bbt_init() Message-ID: <20181127092232.3a6d1661@bbrezillon> In-Reply-To: <1543304637-27308-1-git-send-email-frieder.schrempf@kontron.de> References: <1543304637-27308-1-git-send-email-frieder.schrempf@kontron.de> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 27 Nov 2018 07:44:52 +0000 Schrempf Frieder wrote: > Fix the size of the buffer allocated to store the in-memory BBT. > This bug was previously hidden by a different bug, that was fixed in > d098093ba06e. Oops :-/. > > Fixes: 9c3736a3de21 ("mtd: nand: Add core infrastructure to deal with NAND devices") > Cc: > Signed-off-by: Frieder Schrempf > --- > drivers/mtd/nand/bbt.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/mtd/nand/bbt.c b/drivers/mtd/nand/bbt.c > index 56cde38..c12497f 100644 > --- a/drivers/mtd/nand/bbt.c > +++ b/drivers/mtd/nand/bbt.c > @@ -27,7 +27,8 @@ int nanddev_bbt_init(struct nand_device *nand) > unsigned int nwords = DIV_ROUND_UP(nblocks * bits_per_block, > BITS_PER_LONG); > > - nand->bbt.cache = kzalloc(nwords, GFP_KERNEL); > + nand->bbt.cache = kzalloc(nwords * (BITS_PER_LONG / BITS_PER_BYTE), I prefer * sizeof(*nand->bbt.cache) If you're okay with this change, I'll fix it when applying (no need to send a new version). Thanks, Boris > + GFP_KERNEL); > if (!nand->bbt.cache) > return -ENOMEM; >