diff options
| author | Trond Myklebust <trondmy@gmail.com> | 2019-09-16 09:12:19 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2019-09-20 15:15:24 -0400 |
| commit | 9ba828861c56a21d211d5d10f5643774b1ea330d (patch) | |
| tree | 45468b00aca4baedcad2cbbd9c6ed5fba9c0bd21 /net/sunrpc | |
| parent | f925ab926d1a9c2112d34ecb59fbb050bb58646c (diff) | |
| download | linux-9ba828861c56a21d211d5d10f5643774b1ea330d.tar.bz2 | |
SUNRPC: Don't try to parse incomplete RPC messages
If the copy of the RPC reply into our buffers did not complete, and
we could end up with a truncated message. In that case, just resend
the call.
Fixes: a0584ee9aed80 ("SUNRPC: Use struct xdr_stream when decoding...")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/clnt.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 44d5cf318813..8b622ceb1158 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -2465,6 +2465,7 @@ call_decode(struct rpc_task *task) struct rpc_clnt *clnt = task->tk_client; struct rpc_rqst *req = task->tk_rqstp; struct xdr_stream xdr; + int err; dprint_status(task); @@ -2487,6 +2488,15 @@ call_decode(struct rpc_task *task) * before it changed req->rq_reply_bytes_recvd. */ smp_rmb(); + + /* + * Did we ever call xprt_complete_rqst()? If not, we should assume + * the message is incomplete. + */ + err = -EAGAIN; + if (!req->rq_reply_bytes_recvd) + goto out; + req->rq_rcv_buf.len = req->rq_private_buf.len; /* Check that the softirq receive buffer is valid */ @@ -2495,7 +2505,9 @@ call_decode(struct rpc_task *task) xdr_init_decode(&xdr, &req->rq_rcv_buf, req->rq_rcv_buf.head[0].iov_base, req); - switch (rpc_decode_header(task, &xdr)) { + err = rpc_decode_header(task, &xdr); +out: + switch (err) { case 0: task->tk_action = rpc_exit_task; task->tk_status = rpcauth_unwrap_resp(task, &xdr); |