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,HEADER_FROM_DIFFERENT_DOMAINS, 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 E2ABEC433B4 for ; Wed, 12 May 2021 15:02:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ADCF161422 for ; Wed, 12 May 2021 15:02:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232311AbhELPDR (ORCPT ); Wed, 12 May 2021 11:03:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:45078 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232006AbhELO7q (ORCPT ); Wed, 12 May 2021 10:59:46 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3E51561439; Wed, 12 May 2021 14:56:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620831402; bh=QE6K71J0sjgfatWfNw0lcXvwvtSy7HKowf8ZiKh4RR8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pbYD3IeA4PXNI7227hJHjmrifsADCYVOr+/1D3kC3kOgfrFA3pvr46jqxkyuDQZ7R r6PQhIfQkqv0OiXlvVRakWpqs+kERkzXj7GkAMrN8Ri4YtusKqYZ9E7t5+kMgMih8+ LipdODj+hBtcMdUhSjoStCIO3wDapG+XuoDqFlcE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lv Yunlong , Miquel Raynal , Sasha Levin Subject: [PATCH 5.4 105/244] mtd: rawnand: gpmi: Fix a double free in gpmi_nand_init Date: Wed, 12 May 2021 16:47:56 +0200 Message-Id: <20210512144746.389509374@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144743.039977287@linuxfoundation.org> References: <20210512144743.039977287@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lv Yunlong [ Upstream commit 076de75de1e53160e9b099f75872c1f9adf41a0b ] If the callee gpmi_alloc_dma_buffer() failed to alloc memory for this->raw_buffer, gpmi_free_dma_buffer() will be called to free this->auxiliary_virt. But this->auxiliary_virt is still a non-NULL and valid ptr. Then gpmi_alloc_dma_buffer() returns err and gpmi_free_dma_buffer() is called again to free this->auxiliary_virt in err_out. This causes a double free. As gpmi_free_dma_buffer() has already called in gpmi_alloc_dma_buffer's error path, so it should return err directly instead of releasing the dma buffer again. Fixes: 4d02423e9afe6 ("mtd: nand: gpmi: Fix gpmi_nand_init() error path") Signed-off-by: Lv Yunlong Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20210403060905.5251-1-lyl2019@mail.ustc.edu.cn Signed-off-by: Sasha Levin --- drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c index 2390ed077a2f..60f146920b9f 100644 --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c @@ -2598,7 +2598,7 @@ static int gpmi_nand_init(struct gpmi_nand_data *this) this->bch_geometry.auxiliary_size = 128; ret = gpmi_alloc_dma_buffer(this); if (ret) - goto err_out; + return ret; nand_controller_init(&this->base); this->base.ops = &gpmi_nand_controller_ops; -- 2.30.2