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SUNRPC: fix a list corruption issue in xprt_release()

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We remove the request from the receive list before we call
xprt_wait_on_pinned_rqst(), and so we need to use list_del_init().
Otherwise, we will see list corruption when xprt_complete_rqst()
is called.

Reported-by: Emre Celebi <emre@primarydata.com>
Fixes: ce7c252a8c ("SUNRPC: Add a separate spinlock to protect...")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2017-10-13 14:08:55 -04:00
parent 33d930e59a
commit 4c625a974f
1 changed files with 1 additions and 1 deletions
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2
net/sunrpc/xprt.c
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@ -1333,7 +1333,7 @@ void xprt_release(struct rpc_task *task)
rpc_count_iostats(task, task->tk_client->cl_metrics);
spin_lock(&xprt->recv_lock);
if (!list_empty(&req->rq_list)) {
list_del(&req->rq_list);
list_del_init(&req->rq_list);
xprt_wait_on_pinned_rqst(req);
}
spin_unlock(&xprt->recv_lock);