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authorTrond Myklebust <trond.myklebust@hammerspace.com>2019-03-15 13:29:00 (GMT)
committerTrond Myklebust <trond.myklebust@hammerspace.com>2019-03-15 17:08:59 (GMT)
commiteb90a16e9087063943859ae99bbdddd1fbfcf477 (patch)
tree3ca0be502f60b77e57006e08d0233e9d614a032b
parent27adc785928ae6b34cdda96f472735b77c91e247 (diff)
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>
-rw-r--r--net/sunrpc/clnt.c20
1 files changed, 7 insertions, 13 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 3108738..1f47801 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;
}

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