From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758299Ab3APAWr (ORCPT ); Tue, 15 Jan 2013 19:22:47 -0500 Received: from mail.kernel.org ([198.145.19.201]:42003 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758254Ab3AOWaO (ORCPT ); Tue, 15 Jan 2013 17:30:14 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Tatyana Nikolova , Roland Dreier , CAI Qian Subject: [ 089/221] RDMA/nes: Fix for crash when registering zero length MR for CQ Date: Tue, 15 Jan 2013 10:50:16 -0800 Message-Id: <20130115185004.461014089@linuxfoundation.org> X-Mailer: git-send-email 1.8.1.336.g94702dd In-Reply-To: <20130115184958.025580322@linuxfoundation.org> References: <20130115184958.025580322@linuxfoundation.org> User-Agent: quilt/0.60-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.7-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tatyana Nikolova commit 7d9c199a55200c9b9fcad08e150470d02fb385be upstream. Signed-off-by: Tatyana Nikolova Signed-off-by: Roland Dreier Signed-off-by: CAI Qian Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/hw/nes/nes_verbs.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/infiniband/hw/nes/nes_verbs.c +++ b/drivers/infiniband/hw/nes/nes_verbs.c @@ -2559,6 +2559,11 @@ static struct ib_mr *nes_reg_user_mr(str return ibmr; case IWNES_MEMREG_TYPE_QP: case IWNES_MEMREG_TYPE_CQ: + if (!region->length) { + nes_debug(NES_DBG_MR, "Unable to register zero length region for CQ\n"); + ib_umem_release(region); + return ERR_PTR(-EINVAL); + } nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL); if (!nespbl) { nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");