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authorAndy Adamson <andros@netapp.com>2012-11-27 10:34:19 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-12-12 15:36:02 -0500
commiteb96d5c97b0825d542e9c4ba5e0a22b519355166 (patch)
tree62c98e2bdbcc7334a7043725d1fd81a589a75177 /fs/nfs/client.c
parent620038f6d2304475dce800dc5c75fc335a19613a (diff)
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 'fs/nfs/client.c')
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