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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-01-08 16:03:22 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-02-01 16:13:47 +0100 |
| commit | 45bc0dce9879505d6fd9ff68dcd0359fb260dfd7 (patch) | |
| tree | e5223240d66056dd158a8a67f972572f41ceb18d /net/sunrpc | |
| parent | SUNRPC: Pass pointers to struct rpc_xprt to the congestion window (diff) | |
| download | linux-45bc0dce9879505d6fd9ff68dcd0359fb260dfd7.tar.xz linux-45bc0dce9879505d6fd9ff68dcd0359fb260dfd7.zip | |
SUNRPC: Fix an RCU dereference in xprt_reserve
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/xprt.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index e1e439ea177f..7f3a01a8cae7 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1093,7 +1093,7 @@ EXPORT_SYMBOL_GPL(xprt_free); */ void xprt_reserve(struct rpc_task *task) { - struct rpc_xprt *xprt = task->tk_xprt; + struct rpc_xprt *xprt; task->tk_status = 0; if (task->tk_rqstp != NULL) @@ -1101,7 +1101,10 @@ void xprt_reserve(struct rpc_task *task) task->tk_timeout = 0; task->tk_status = -EAGAIN; + rcu_read_lock(); + xprt = rcu_dereference(task->tk_client->cl_xprt); xprt->ops->alloc_slot(xprt, task); + rcu_read_unlock(); } static inline __be32 xprt_alloc_xid(struct rpc_xprt *xprt) |