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RFC 5531 defines the body of an RPC Call message like this:
struct call_body {
unsigned int rpcvers;
unsigned int prog;
unsigned int vers;
unsigned int proc;
opaque_auth cred;
opaque_auth verf;
/* procedure-specific parameters start here */
};
In the current server code, decoding a struct opaque_auth type is
open-coded in several places, and is thus difficult to harden
everywhere.
Introduce a helper for decoding an opaque_auth within the context
of a xdr_stream. This helper can be shared with all authentication
flavor implemenations, even on the client-side.
Done as part of hardening the server-side RPC header decoding paths.
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.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.