Patch "NFS: Fix a race between mmap() and O_DIRECT" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

NFS: Fix a race between mmap() and O_DIRECT

to the 4.14-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-fix-a-race-between-mmap-and-o_direct.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Trond Myklebust <[email protected]>
Date: Sun, 28 Jan 2018 09:29:41 -0500
Subject: NFS: Fix a race between mmap() and O_DIRECT

From: Trond Myklebust <[email protected]>

commit e231c6879cfd44e4fffd384bb6dd7d313249a523 upstream.

When locking the file in order to do O_DIRECT on it, we must unmap any mmapped ranges on the pagecache so that we can flush out the dirty data.

---
 fs/nfs/io.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -99,7 +99,7 @@ static void nfs_block_buffered(struct nf
 {
 	if (!test_bit(NFS_INO_ODIRECT, &nfsi->flags)) {
 		set_bit(NFS_INO_ODIRECT, &nfsi->flags);
-		nfs_wb_all(inode);
+		nfs_sync_mapping(inode->i_mapping);
 	}
 }
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/nfs-pnfs-fix-nfs_direct_req-ref-leak-when-i-o-falls-back-to-the-mds.patch queue-4.14/nfs-fix-nfsstat-breakage-due-to-lookupp.patch queue-4.14/nfs-add-a-cond_resched-to-nfs_commit_release_pages.patch queue-4.14/nfs41-do-not-return-enomem-on-layoutunavailable.patch queue-4.14/nfs-commit-direct-writes-even-if-they-fail-partially.patch queue-4.14/nfs-fix-a-race-between-mmap-and-o_direct.patch