From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:51206 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759113AbdLRNxP (ORCPT ); Mon, 18 Dec 2017 08:53:15 -0500 Subject: Patch "afs: Fix the maths in afs_fs_store_data()" has been added to the 4.4-stable tree To: dhowells@redhat.com, alexander.levin@verizon.com, gregkh@linuxfoundation.org Cc: , From: Date: Mon, 18 Dec 2017 14:53:10 +0100 Message-ID: <1513605190188145@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 afs: Fix the maths in afs_fs_store_data() 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: afs-fix-the-maths-in-afs_fs_store_data.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 Mon Dec 18 14:47:43 CET 2017 From: David Howells Date: Thu, 16 Mar 2017 16:27:47 +0000 Subject: afs: Fix the maths in afs_fs_store_data() From: David Howells [ Upstream commit 146a1192783697810b63a1e41c4d59fc93387340 ] afs_fs_store_data() works out of the size of the write it's going to make, but it uses 32-bit unsigned subtraction in one place that gets automatically cast to loff_t. However, if to < offset, then the number goes negative, but as the result isn't signed, this doesn't get sign-extended to 64-bits when placed in a loff_t. Fix by casting the operands to loff_t. Signed-off-by: David Howells Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- fs/afs/fsclient.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/afs/fsclient.c +++ b/fs/afs/fsclient.c @@ -1225,7 +1225,7 @@ int afs_fs_store_data(struct afs_server _enter(",%x,{%x:%u},,", key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode); - size = to - offset; + size = (loff_t)to - (loff_t)offset; if (first != last) size += (loff_t)(last - first) << PAGE_SHIFT; pos = (loff_t)first << PAGE_SHIFT; Patches currently in stable-queue which might be from dhowells@redhat.com are queue-4.4/afs-flush-outstanding-writes-when-an-fd-is-closed.patch queue-4.4/afs-fix-the-maths-in-afs_fs_store_data.patch queue-4.4/afs-populate-group-id-from-vnode-status.patch queue-4.4/afs-prevent-callback-expiry-timer-overflow.patch queue-4.4/keys-add-missing-permission-check-for-request_key-destination.patch queue-4.4/afs-adjust-mode-bits-processing.patch queue-4.4/afs-fix-page-leak-in-afs_write_begin.patch queue-4.4/afs-fix-missing-put_page.patch queue-4.4/afs-migrate-vlocation-fields-to-64-bit.patch queue-4.4/afs-populate-and-use-client-modification-time.patch queue-4.4/afs-fix-afs_kill_pages.patch