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| author | Andy Adamson <andros@netapp.com> | 2012-11-27 16:34:19 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-12-12 21:36:02 +0100 |
| commit | eb96d5c97b0825d542e9c4ba5e0a22b519355166 (patch) | |
| tree | 62c98e2bdbcc7334a7043725d1fd81a589a75177 /net/sunrpc | |
| parent | SUNRPC set gss gc_expiry to full lifetime (diff) | |
| download | linux-eb96d5c97b0825d542e9c4ba5e0a22b519355166.tar.xz linux-eb96d5c97b0825d542e9c4ba5e0a22b519355166.zip | |
SUNRPC handle EKEYEXPIRED in call_refreshresult
Currently, when an RPCSEC_GSS context has expired or is non-existent
and the users (Kerberos) credentials have also expired or are non-existent,
the client receives the -EKEYEXPIRED error and tries to refresh the context
forever. If an application is performing I/O, or other work against the share,
the application hangs, and the user is not prompted to refresh/establish their
credentials. This can result in a denial of service for other users.
Users are expected to manage their Kerberos credential lifetimes to mitigate
this issue.
Move the -EKEYEXPIRED handling into the RPC layer. Try tk_cred_retry number
of times to refresh the gss_context, and then return -EACCES to the application.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/clnt.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index c69e199b1082..55e174f2d02f 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1381,6 +1381,7 @@ call_refreshresult(struct rpc_task *task) return; case -ETIMEDOUT: rpc_delay(task, 3*HZ); + case -EKEYEXPIRED: case -EAGAIN: status = -EACCES; if (!task->tk_cred_retry) |