From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:39936 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965373AbdAFPcu (ORCPT ); Fri, 6 Jan 2017 10:32:50 -0500 Subject: Patch "nfs_write_end(): fix handling of short copies" has been added to the 4.8-stable tree To: viro@zeniv.linux.org.uk, gregkh@linuxfoundation.org Cc: , From: Date: Fri, 06 Jan 2017 16:32:16 +0100 Message-ID: <1483716736127221@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 nfs_write_end(): fix handling of short copies to the 4.8-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: nfs_write_end-fix-handling-of-short-copies.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From c0cf3ef5e0f47e385920450b245d22bead93e7ad Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 5 Sep 2016 21:42:32 -0400 Subject: nfs_write_end(): fix handling of short copies From: Al Viro commit c0cf3ef5e0f47e385920450b245d22bead93e7ad upstream. What matters when deciding if we should make a page uptodate is not how much we _wanted_ to copy, but how much we actually have copied. As it is, on architectures that do not zero tail on short copy we can leave uninitialized data in page marked uptodate. Signed-off-by: Al Viro Signed-off-by: Greg Kroah-Hartman --- fs/nfs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -397,7 +397,7 @@ static int nfs_write_end(struct file *fi */ if (!PageUptodate(page)) { unsigned pglen = nfs_page_length(page); - unsigned end = offset + len; + unsigned end = offset + copied; if (pglen == 0) { zero_user_segments(page, 0, offset, Patches currently in stable-queue which might be from viro@zeniv.linux.org.uk are queue-4.8/sg_write-bsg_write-is-not-fit-to-be-called-under-kernel_ds.patch queue-4.8/nfs_write_end-fix-handling-of-short-copies.patch