From patchwork Sun May 31 15:08:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 11580683 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3C02C739 for ; Sun, 31 May 2020 15:09:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 22C07207C4 for ; Sun, 31 May 2020 15:09:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="q/nmFo7C" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728318AbgEaPJG (ORCPT ); Sun, 31 May 2020 11:09:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728228AbgEaPIs (ORCPT ); Sun, 31 May 2020 11:08:48 -0400 Received: from mail-ed1-x543.google.com (mail-ed1-x543.google.com [IPv6:2a00:1450:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA469C061A0E; Sun, 31 May 2020 08:08:47 -0700 (PDT) Received: by mail-ed1-x543.google.com with SMTP id c35so5361633edf.5; Sun, 31 May 2020 08:08:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=r8r5svcWyImZ6w7QoO3hY5ggCN6NWRqtw0VlABPCcR8=; b=q/nmFo7CUpwfne018Nypvy5mSG+2CnTbbEqtMuHqK6OVR43W1EdoXTh7a6zQ1JrFOM x3DdCWFfLx0NfP3kDyVIqh5XYLTm13+0mvGpas32T2MsTFXs1KWkBdG1kd1LWwexCkfK nUxFtYuBRDWYj3jKWDVFN5sv+QScuc2fc9X/cE6YdNH38GY7yDie9gi3+ykZIN1AFteI HMimIvkeMDlH6mMslVBZeXWDMJvLRFEW2+WqI3lhqfvQCvBniTCjsZ5qfPuEYfvzqCeJ 0wrOFFdgv8qVxplqzOXHsNwRhdCBWM7dLSLi5zthu6AwC/dyL0za8P33cGM4RcgMQ69V 6jeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=r8r5svcWyImZ6w7QoO3hY5ggCN6NWRqtw0VlABPCcR8=; b=Zb9ulma2N7iuE9waIPNTUBtMnAyxOp9+938HVzS1lANmllGxO2wJYmfoFf8/ekxI6G mwPJ8u3grojI/pKKxmLGXt0bSbE6HBIe+QufAugfCi8dEv7IqGC991w2lPu4xXVwiqUM OFQSEd7Fj7il56/liKhm4E0rKxK0i2R4AJtuaSFc9q+KhpDc2ujgQbOt92kRsLgYgRAv W3jbcfM/K6PTTPbCkEn4/ugxZASyV4ZcTofr3ptUGqf1XlWo7StczJfMMuYUE+WO8yBl HMy6pi0VsyEynK+OM/KM7LmCnIlrpwVEJPz9PlYPMkh95XolnPxqkbPYH8ipk3wXwuB3 JEbQ== X-Gm-Message-State: AOAM533JGkYeF+99leS2olsGy2MKXXRJ3UCBJqPNuMyRNPDohnPZvfaa sofMRts5ckBldC8bj1uko4U= X-Google-Smtp-Source: ABdhPJwPp/0rbwWDA74IuEo4/S5AWdiSYnpFEIw8E9n9aVzwavto22sZhP8NUGmZlYy7C1guSNxO8w== X-Received: by 2002:a50:f052:: with SMTP id u18mr17198321edl.16.1590937726497; Sun, 31 May 2020 08:08:46 -0700 (PDT) Received: from localhost.localdomain (ip5f5bfcfd.dynamic.kabel-deutschland.de. [95.91.252.253]) by smtp.gmail.com with ESMTPSA id a62sm9564928edf.38.2020.05.31.08.08.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 31 May 2020 08:08:46 -0700 (PDT) From: Bean Huo To: alim.akhtar@samsung.com, avri.altman@wdc.com, asutoshd@codeaurora.org, jejb@linux.ibm.com, martin.petersen@oracle.com, stanley.chu@mediatek.com, beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com, cang@codeaurora.org Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 3/5] scsi: ufs: fix potential access NULL pointer while memcpy Date: Sun, 31 May 2020 17:08:29 +0200 Message-Id: <20200531150831.9946-4-huobean@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200531150831.9946-1-huobean@gmail.com> References: <20200531150831.9946-1-huobean@gmail.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo If param_offset is not 0, the memcpy length shouldn't be the true descriptor length. Fixes: a4b0e8a4e92b ("scsi: ufs: Factor out ufshcd_read_desc_param") Signed-off-by: Bean Huo --- drivers/scsi/ufs/ufshcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index f7e8bfefe3d4..bc52a0e89cd3 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -3211,7 +3211,7 @@ int ufshcd_read_desc_param(struct ufs_hba *hba, /* Check wherher we will not copy more data, than available */ if (is_kmalloc && param_size > buff_len) - param_size = buff_len; + param_size = buff_len - param_offset; if (is_kmalloc) memcpy(param_read_buf, &desc_buf[param_offset], param_size);