From eb90a16e9087063943859ae99bbdddd1fbfcf477 Mon Sep 17 00:00:00 2001 From: Trond Myklebust <trond.myklebust@hammerspace.com> Date: Fri, 15 Mar 2019 09:29:00 -0400 Subject: SUNRPC: rpc_decode_header() must always return a non-zero value on error Ensure that when the "garbage args" case falls through, we do set an error of EIO. Fixes: a0584ee9aed8 ("SUNRPC: Use struct xdr_stream when decoding...") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> --- net/sunrpc/clnt.c | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 310873895578..1f47801e0002 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -2454,7 +2454,7 @@ static noinline int rpc_decode_header(struct rpc_task *task, struct xdr_stream *xdr) { struct rpc_clnt *clnt = task->tk_client; - int error = -EACCES; + int error; __be32 *p; /* RFC-1014 says that the representation of XDR data must be a @@ -2463,7 +2463,7 @@ rpc_decode_header(struct rpc_task *task, struct xdr_stream *xdr) * undefined results */ if (task->tk_rqstp->rq_rcv_buf.len & 3) - goto out_badlen; + goto out_unparsable; p = xdr_inline_decode(xdr, 3 * sizeof(*p)); if (!p) @@ -2498,9 +2498,10 @@ rpc_decode_header(struct rpc_task *task, struct xdr_stream *xdr) goto out_err; case rpc_garbage_args: trace_rpc__garbage_args(task); + error = -EIO; break; default: - trace_rpc__unparsable(task); + goto out_unparsable; } out_garbage: @@ -2514,11 +2515,6 @@ out_err: rpc_exit(task, error); return error; -out_badlen: - trace_rpc__unparsable(task); - error = -EIO; - goto out_err; - out_unparsable: trace_rpc__unparsable(task); error = -EIO; @@ -2529,6 +2525,7 @@ out_verifier: goto out_garbage; out_msg_denied: + error = -EACCES; p = xdr_inline_decode(xdr, sizeof(*p)); if (!p) goto out_unparsable; @@ -2540,9 +2537,7 @@ out_msg_denied: error = -EPROTONOSUPPORT; goto out_err; default: - trace_rpc__unparsable(task); - error = -EIO; - goto out_err; + goto out_unparsable; } p = xdr_inline_decode(xdr, sizeof(*p)); @@ -2577,8 +2572,7 @@ out_msg_denied: task->tk_xprt->servername); break; default: - trace_rpc__unparsable(task); - error = -EIO; + goto out_unparsable; } goto out_err; } -- cgit v1.2.3