linux-kernel - [24/48] NFSv4.1: fix backchannel slotid off-by-one bug

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Date:	Mon, 16 Jan 2012 10:44:51 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Andy Adamson <andros@...app.com>,
	Trond Myklebust <Trond.Myklebust@...app.com>
Subject: [24/48] NFSv4.1: fix backchannel slotid off-by-one bug

3.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andy Adamson <andros@...app.com>

commit 61f2e5106582d02f30b6807e3f9c07463c572ccb upstream.

Signed-off-by: Andy Adamson <andros@...app.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

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

--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -339,7 +339,7 @@ validate_seqid(struct nfs4_slot_table *t
 	dprintk("%s enter. slotid %d seqid %d\n",
 		__func__, args->csa_slotid, args->csa_sequenceid);
 
-	if (args->csa_slotid > NFS41_BC_MAX_CALLBACKS)
+	if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS)
 		return htonl(NFS4ERR_BADSLOT);
 
 	slot = tbl->slots + args->csa_slotid;


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