From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:48478 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755649AbeCVOCj (ORCPT ); Thu, 22 Mar 2018 10:02:39 -0400 Subject: Patch "IB/mlx4: Change vma from shared to private" has been added to the 4.4-stable tree To: maorg@mellanox.com, alexander.levin@microsoft.com, dledford@redhat.com, gregkh@linuxfoundation.org, leon@kernel.org Cc: , From: Date: Thu, 22 Mar 2018 15:01:32 +0100 Message-ID: <152172729210144@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/mlx4: Change vma from shared to private to the 4.4-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-mlx4-change-vma-from-shared-to-private.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Thu Mar 22 14:57:32 CET 2018 From: Maor Gottlieb Date: Wed, 29 Mar 2017 06:03:01 +0300 Subject: IB/mlx4: Change vma from shared to private From: Maor Gottlieb [ Upstream commit ca37a664a8e4e9988b220988ceb4d79e3316f195 ] Anonymous VMA (->vm_ops == NULL) cannot be shared, otherwise it would lead to SIGBUS. Remove the shared flags from the vma after we change it to be anonymous. This is easily reproduced by doing modprobe -r while running a user-space application such as raw_ethernet_bw. Fixes: ae184ddeca5db ('IB/mlx4_ib: Disassociate support') Signed-off-by: Maor Gottlieb Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/hw/mlx4/main.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -1055,6 +1055,8 @@ static void mlx4_ib_disassociate_ucontex BUG_ON(1); } + context->hw_bar_info[i].vma->vm_flags &= + ~(VM_SHARED | VM_MAYSHARE); /* context going to be destroyed, should not access ops any more */ context->hw_bar_info[i].vma->vm_ops = NULL; } Patches currently in stable-queue which might be from maorg@mellanox.com are queue-4.4/ib-mlx4-change-vma-from-shared-to-private.patch queue-4.4/ib-mlx4-take-write-semaphore-when-changing-the-vma-struct.patch