Patch "nfsd4: disallow ALLOCATE with special stateids" has been added to the 3.19-stable tree

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

nfsd4: disallow ALLOCATE with special stateids

to the 3.19-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:
nfsd4-disallow-allocate-with-special-stateids.patch
and it can be found in the queue-3.19 subdirectory.

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

From: "J. Bruce Fields" <[email protected]>
Date: Fri, 3 Apr 2015 16:24:27 -0400
Subject: nfsd4: disallow ALLOCATE with special stateids

From: "J. Bruce Fields" <[email protected]>

commit 5ba4a25ab7b13be528b23f85182f4d09cf7f71ad upstream.

vfs_fallocate will hit a NULL dereference if the client tries an ALLOCATE or DEALLOCATE with a special stateid. Fix that. (We also depend on the open to have broken any conflicting leases or delegations for us.)

(If it turns out we need to allow special stateid's then we could do a temporary open here in the special-stateid case, as we do for read and write. For now I'm assuming it's not necessary.)

---
 fs/nfsd/nfs4proc.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -1028,6 +1028,8 @@ nfsd4_fallocate(struct svc_rqst *rqstp,
 		dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
 		return status;
 	}
+	if (!file)
+		return nfserr_bad_stateid;
 
 	status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
 				     fallocate->falloc_offset,

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

queue-3.19/nfsd4-disallow-seek-with-special-stateids.patch queue-3.19/nfsd-eliminate-nfsd_debug.patch queue-3.19/nfsd4-fix-read-permission-checking.patch queue-3.19/nfsd4-disallow-allocate-with-special-stateids.patch