Patch "nfsd: CLOSE SHOULD return the invalid special stateid for NFSv4.x (x>0)" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

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

    nfsd: CLOSE SHOULD return the invalid special stateid for NFSv4.x (x>0)

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:
     nfsd-close-should-return-the-invalid-special-stateid-for-nfsv4.x-x-0.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 <stable@vger.kernel.org> know about it.


>From foo@baz Thu Feb  1 14:14:46 CET 2018
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Fri, 3 Nov 2017 08:00:12 -0400
Subject: nfsd: CLOSE SHOULD return the invalid special stateid for NFSv4.x (x>0)

From: Trond Myklebust <trond.myklebust@primarydata.com>


[ Upstream commit fb500a7cfee7f2f447d2bbf30cb59629feab6ac1 ]

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/nfsd/nfs4state.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -63,6 +63,9 @@ static const stateid_t zero_stateid = {
 static const stateid_t currentstateid = {
 	.si_generation = 1,
 };
+static const stateid_t close_stateid = {
+	.si_generation = 0xffffffffU,
+};
 
 static u64 current_sessionid = 1;
 
@@ -5243,6 +5246,11 @@ nfsd4_close(struct svc_rqst *rqstp, stru
 	nfsd4_close_open_stateid(stp);
 	mutex_unlock(&stp->st_mutex);
 
+	/* See RFC5661 sectionm 18.2.4 */
+	if (stp->st_stid.sc_client->cl_minorversion)
+		memcpy(&close->cl_stateid, &close_stateid,
+				sizeof(close->cl_stateid));
+
 	/* put reference from nfs4_preprocess_seqid_op */
 	nfs4_put_stid(&stp->st_stid);
 out:


Patches currently in stable-queue which might be from trond.myklebust@primarydata.com are

queue-4.4/nfsd-ensure-we-check-stateid-validity-in-the-seqid-operation-checks.patch
queue-4.4/sunrpc-allow-connect-to-return-ehostunreach.patch
queue-4.4/nfsd-close-should-return-the-invalid-special-stateid-for-nfsv4.x-x-0.patch