From 24b74bf0c9e08cbda74d3c64af69ad402ed54e04 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 19 Apr 2008 13:15:47 -0400 Subject: [PATCH] SUNRPC: Fix a bug in call_decode() call_verify() can, under certain circumstances, free the RPC slot. In that case, our cached pointer 'req = task->tk_rqstp' is invalid. Bug was introduced in commit 220bcc2afd7011b3e0569fc178331fa983c92c1b (SUNRPC: Don't call xprt_release in call refresh). Signed-off-by: Trond Myklebust --- net/sunrpc/clnt.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index ea14314331..522b06849f 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1240,10 +1240,13 @@ call_decode(struct rpc_task *task) task->tk_status); return; out_retry: - req->rq_received = req->rq_private_buf.len = 0; task->tk_status = 0; - if (task->tk_client->cl_discrtry) - xprt_force_disconnect(task->tk_xprt); + /* Note: call_verify() may have freed the RPC slot */ + if (task->tk_rqstp == req) { + req->rq_received = req->rq_private_buf.len = 0; + if (task->tk_client->cl_discrtry) + xprt_force_disconnect(task->tk_xprt); + } } /* -- 2.39.5