[PATCH 3.13 047/120] NFSv4: Fix a slot leak in nfs40_sequence_done

From: Greg Kroah-Hartman
Date: Tue Feb 11 2014 - 15:46:44 EST


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

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

From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>

commit cab92c19821a814ecf5a5279e2699bf28e66caee upstream.

The check for whether or not we sent an RPC call in nfs40_sequence_done
is insufficient to decide whether or not we are holding a session slot,
and thus should not be used to decide when to free that slot.

This patch replaces the RPC_WAS_SENT() test with the correct test for
whether or not slot == NULL.

Cc: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
fs/nfs/nfs4proc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -539,7 +539,7 @@ static int nfs40_sequence_done(struct rp
struct nfs4_slot *slot = res->sr_slot;
struct nfs4_slot_table *tbl;

- if (!RPC_WAS_SENT(task))
+ if (slot == NULL)
goto out;

tbl = slot->table;


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