Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754381AbcDJUH3 (ORCPT ); Sun, 10 Apr 2016 16:07:29 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53106 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758263AbcDJS6s (ORCPT ); Sun, 10 Apr 2016 14:58:48 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Raghava Aditya Renukunta , Johannes Thumshirn , Tomas Henzl , "Martin K. Petersen" Subject: [PATCH 4.4 040/210] aacraid: Fix memory leak in aac_fib_map_free Date: Sun, 10 Apr 2016 11:34:21 -0700 Message-Id: <20160410183528.084819110@linuxfoundation.org> X-Mailer: git-send-email 2.8.0 In-Reply-To: <20160410183526.651820045@linuxfoundation.org> References: <20160410183526.651820045@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1741 Lines: 47 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Raghava Aditya Renukunta commit f88fa79a61726ce9434df9b4aede36961f709f17 upstream. aac_fib_map_free() calls pci_free_consistent() without checking that dev->hw_fib_va is not NULL and dev->max_fib_size is not zero.If they are indeed NULL/0, this will result in a hang as pci_free_consistent() will attempt to invalidate cache for the entire 64-bit address space (which would take a very long time). Fixed by adding a check to make sure that dev->hw_fib_va and dev->max_fib_size are not NULL and 0 respectively. Fixes: 9ad5204d6 - "[SCSI]aacraid: incorrect dma mapping mask during blinked recover or user initiated reset" Signed-off-by: Raghava Aditya Renukunta Reviewed-by: Johannes Thumshirn Reviewed-by: Tomas Henzl Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/aacraid/commsup.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) --- a/drivers/scsi/aacraid/commsup.c +++ b/drivers/scsi/aacraid/commsup.c @@ -83,9 +83,12 @@ static int fib_map_alloc(struct aac_dev void aac_fib_map_free(struct aac_dev *dev) { - pci_free_consistent(dev->pdev, - dev->max_fib_size * (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB), - dev->hw_fib_va, dev->hw_fib_pa); + if (dev->hw_fib_va && dev->max_fib_size) { + pci_free_consistent(dev->pdev, + (dev->max_fib_size * + (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB)), + dev->hw_fib_va, dev->hw_fib_pa); + } dev->hw_fib_va = NULL; dev->hw_fib_pa = 0; }