Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753558AbcDZSfK (ORCPT ); Tue, 26 Apr 2016 14:35:10 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:56414 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752958AbcDZSSn (ORCPT ); Tue, 26 Apr 2016 14:18:43 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Lu Baolu , Mathias Nyman , Greg Kroah-Hartman , Kamal Mostafa Subject: [PATCH 4.2.y-ckt 47/93] usb: xhci: fix wild pointers in xhci_mem_cleanup Date: Tue, 26 Apr 2016 11:16:47 -0700 Message-Id: <1461694653-29506-48-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1461694653-29506-1-git-send-email-kamal@canonical.com> References: <1461694653-29506-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 4.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1243 Lines: 40 4.2.8-ckt9 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Lu Baolu commit 71504062a7c34838c3fccd92c447f399d3cb5797 upstream. This patch fixes some wild pointers produced by xhci_mem_cleanup. These wild pointers will cause system crash if xhci_mem_cleanup() is called twice. Reported-and-tested-by: Pengcheng Li Signed-off-by: Lu Baolu Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman Signed-off-by: Kamal Mostafa --- drivers/usb/host/xhci-mem.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 41f841f..5ab70af 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1879,6 +1879,12 @@ no_bw: kfree(xhci->rh_bw); kfree(xhci->ext_caps); + xhci->usb2_ports = NULL; + xhci->usb3_ports = NULL; + xhci->port_array = NULL; + xhci->rh_bw = NULL; + xhci->ext_caps = NULL; + xhci->page_size = 0; xhci->page_shift = 0; xhci->bus_state[0].bus_suspended = 0; -- 2.7.4