This is a note to let you know that I've just added the patch titled
nfs41: fix nfs4_proc_layoutget error handling
to the 3.18-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:
nfs41-fix-nfs4_proc_layoutget-error-handling.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4bd5a980de87d2b5af417485bde97b8eb3d6cf6a Mon Sep 17 00:00:00 2001
From: Peng Tao <tao.peng@xxxxxxxxxxxxxxx>
Date: Mon, 17 Nov 2014 11:05:17 +0800
Subject: nfs41: fix nfs4_proc_layoutget error handling
From: Peng Tao <tao.peng@xxxxxxxxxxxxxxx>
commit 4bd5a980de87d2b5af417485bde97b8eb3d6cf6a upstream.
nfs4_layoutget_release() drops layout hdr refcnt. Grab the refcnt
early so that it is safe to call .release in case nfs4_alloc_pages
fails.
Signed-off-by: Peng Tao <tao.peng@xxxxxxxxxxxxxxx>
Fixes: a47970ff78147 ("NFSv4.1: Hold reference to layout hdr in layoutget")
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/nfs/nfs4proc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7704,6 +7704,9 @@ nfs4_proc_layoutget(struct nfs4_layoutge
dprintk("--> %s\n", __func__);
+ /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
+ pnfs_get_layout_hdr(NFS_I(inode)->layout);
+
lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
if (!lgp->args.layout.pages) {
nfs4_layoutget_release(lgp);
@@ -7716,9 +7719,6 @@ nfs4_proc_layoutget(struct nfs4_layoutge
lgp->res.seq_res.sr_slot = NULL;
nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
- /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
- pnfs_get_layout_hdr(NFS_I(inode)->layout);
-
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return ERR_CAST(task);
Patches currently in stable-queue which might be from tao.peng@xxxxxxxxxxxxxxx are
queue-3.18/nfs41-fix-nfs4_proc_layoutget-error-handling.patch
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