Revert "SUNRPC: Fail faster on bad verifier"

commit e86fcf0820d914389b46658a5a7e8969c3af2d53 upstream.

This reverts commit 0701214cd6e66585a999b132eb72ae0489beb724.

The premise of this commit was incorrect. There are exactly 2 cases
where rpcauth_checkverf() will return an error:

1) If there was an XDR decode problem (i.e. garbage data).
2) If gss_validate() had a problem verifying the RPCSEC_GSS MIC.

In the second case, there are again 2 subcases:

a) The GSS context expires, in which case gss_validate() will force a
   new context negotiation on retry by invalidating the cred.
b) The sequence number check failed because an RPC call timed out, and
   the client retransmitted the request using a new sequence number,
   as required by RFC2203.

In neither subcase is this a fatal error.

Reported-by: Russell Cattelan <cattelan@thebarn.com>
Fixes: 0701214cd6e6 ("SUNRPC: Fail faster on bad verifier")
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index d2ee5663430830e8b867ac9ee118779d777a89e9..b0258507b236ced5e8ac77bfd0e89e81b76f15fd 100644 (file)
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2710,7 +2710,7 @@ out_unparsable:
 
 out_verifier:
        trace_rpc_bad_verifier(task);
-       goto out_err;
+       goto out_garbage;
 
 out_msg_denied:
        error = -EACCES;