From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:43370 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751462AbbEBRZD (ORCPT ); Sat, 2 May 2015 13:25:03 -0400 Subject: Patch "IB/core: disallow registering 0-sized memory region" has been added to the 3.10-stable tree To: ydroneaud@opteya.com, dledford@redhat.com, gregkh@linuxfoundation.org, jackm@mellanox.com, ogerlitz@mellanox.com, raindel@mellanox.com Cc: , From: Date: Sat, 02 May 2015 19:24:54 +0200 Message-ID: <143058749496151@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled IB/core: disallow registering 0-sized memory region to the 3.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ib-core-disallow-registering-0-sized-memory-region.patch and it can be found in the queue-3.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 8abaae62f3fdead8f4ce0ab46b4ab93dee39bab2 Mon Sep 17 00:00:00 2001 From: Yann Droneaud Date: Mon, 13 Apr 2015 14:56:22 +0200 Subject: IB/core: disallow registering 0-sized memory region From: Yann Droneaud commit 8abaae62f3fdead8f4ce0ab46b4ab93dee39bab2 upstream. If ib_umem_get() is called with a size equal to 0 and an non-page aligned address, one page will be pinned and a 0-sized umem will be returned to the caller. This should not be allowed: it's not expected for a memory region to have a size equal to 0. This patch adds a check to explicitly refuse to register a 0-sized region. Link: http://mid.gmane.org/cover.1428929103.git.ydroneaud@opteya.com Cc: Shachar Raindel Cc: Jack Morgenstein Cc: Or Gerlitz Signed-off-by: Yann Droneaud Signed-off-by: Doug Ledford Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/umem.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -94,6 +94,9 @@ struct ib_umem *ib_umem_get(struct ib_uc if (dmasync) dma_set_attr(DMA_ATTR_WRITE_BARRIER, &attrs); + if (!size) + return ERR_PTR(-EINVAL); + /* * If the combination of the addr and size requested for this memory * region causes an integer overflow, return error. Patches currently in stable-queue which might be from ydroneaud@opteya.com are queue-3.10/ib-core-don-t-disallow-registering-region-starting-at-0x0.patch queue-3.10/ib-core-disallow-registering-0-sized-memory-region.patch