e86fcf0820
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>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.