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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>
3494a0066d