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author | J. Bruce Fields <bfields@citi.umich.edu> | 2008-08-07 13:00:20 -0400 |
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committer | J. Bruce Fields <bfields@citi.umich.edu> | 2008-09-29 17:56:56 -0400 |
commit | 04716e6621ff4abb422d64ba7b48718f52716a3e (patch) | |
tree | 742e2e7b6d4c7cf3a39f504000a49e57fe0b538b /kernel/sysctl.c | |
parent | 5dd248f6f1ffe1f691fd66749e2a3dc8f8eb7b5e (diff) |
nfsd: permit unauthenticated stat of export root
RFC 2623 section 2.3.2 permits the server to bypass gss authentication
checks for certain operations that a client may perform when mounting.
In the case of a client that doesn't have some form of credentials
available to it on boot, this allows it to perform the mount unattended.
(Presumably real file access won't be needed until a user with
credentials logs in.)
Being slightly more lenient allows lots of old clients to access
krb5-only exports, with the only loss being a small amount of
information leaked about the root directory of the export.
This affects only v2 and v3; v4 still requires authentication for all
access.
Thanks to Peter Staubach testing against a Solaris client, which
suggesting addition of v3 getattr, to the list, and to Trond for noting
that doing so exposes no additional information.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Cc: Peter Staubach <staubach@redhat.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Diffstat (limited to 'kernel/sysctl.c')
0 files changed, 0 insertions, 0 deletions