From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:54396 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965838AbcKXO65 (ORCPT ); Thu, 24 Nov 2016 09:58:57 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mark Bloch , Maor Gottlieb , Leon Romanovsky , Doug Ledford Subject: [PATCH 4.4 28/31] IB/core: Avoid unsigned int overflow in sg_alloc_table Date: Thu, 24 Nov 2016 15:55:49 +0100 Message-Id: <20161124145448.399695757@linuxfoundation.org> In-Reply-To: <20161124145446.993225208@linuxfoundation.org> References: <20161124145446.993225208@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mark Bloch commit 3c7ba5760ab8eedec01159b267bb9bfcffe522ac upstream. sg_alloc_table gets unsigned int as parameter while the driver returns it as size_t. Check npages isn't greater than maximum unsigned int. Fixes: eeb8461e36c9 ("IB: Refactor umem to use linear SG table") Signed-off-by: Mark Bloch Signed-off-by: Maor Gottlieb Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/umem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -175,7 +175,7 @@ struct ib_umem *ib_umem_get(struct ib_uc cur_base = addr & PAGE_MASK; - if (npages == 0) { + if (npages == 0 || npages > UINT_MAX) { ret = -EINVAL; goto out; }