This is a note to let you know that I've just added the patch titled NFS: Fix initialization of nfs_page_array->npages to the 4.12-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-initialization-of-nfs_page_array-npages.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 2eb3aea7d9c43325a12df312adfc7fb25bbd636b Mon Sep 17 00:00:00 2001 From: Benjamin Coddington <bcodding@xxxxxxxxxx> Date: Fri, 9 Jun 2017 11:03:23 -0400 Subject: NFS: Fix initialization of nfs_page_array->npages From: Benjamin Coddington <bcodding@xxxxxxxxxx> commit 2eb3aea7d9c43325a12df312adfc7fb25bbd636b upstream. Commit 8ef9b0b9e1c0 open-coded nfs_pgarray_set(), and left out the initialization of the nfs_page_array's npages. This mistake didn't show up until testing with block layouts, and there shows that all pNFS reads return -EIO. Fixes: 8ef9b0b9e1c0 ("NFS: move nfs_pgarray_set() to open code") Signed-off-by: Benjamin Coddington <bcodding@xxxxxxxxxx> Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/nfs/pagelist.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -779,6 +779,7 @@ int nfs_generic_pgio(struct nfs_pageio_d gfp_t gfp_flags = GFP_KERNEL; pagecount = nfs_page_array_len(mirror->pg_base, mirror->pg_count); + pg_array->npages = pagecount; if (pagecount <= ARRAY_SIZE(pg_array->page_array)) pg_array->pagevec = pg_array->page_array; Patches currently in stable-queue which might be from bcodding@xxxxxxxxxx are queue-4.12/nfs-fix-initialization-of-nfs_page_array-npages.patch