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nfsd: nfsd4_setclientid_confirm mistakenly expires confirmed client.

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commit ab451ea952 upstream.

From RFC 7530 Section 16.34.5:

o  The server has not recorded an unconfirmed { v, x, c, *, * } and
   has recorded a confirmed { v, x, c, *, s }.  If the principals of
   the record and of SETCLIENTID_CONFIRM do not match, the server
   returns NFS4ERR_CLID_INUSE without removing any relevant leased
   client state, and without changing recorded callback and
   callback_ident values for client { x }.

The current code intends to do what the spec describes above but
it forgot to set 'old' to NULL resulting to the confirmed client
to be expired.

Fixes: 2b63482185 ("nfsd: fix clid_inuse on mount with security change")
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Bruce Fields <bfields@fieldses.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dai Ngo 2022-01-26 13:13:38 -08:00 committed by Greg Kroah-Hartman
parent ec4334152d
commit 51e88e8922
1 changed files with 3 additions and 1 deletions
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4
fs/nfsd/nfs4state.c
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@ -4047,8 +4047,10 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
status = nfserr_clid_inuse; status = nfserr_clid_inuse;
if (client_has_state(old) if (client_has_state(old)
&& !same_creds(&unconf->cl_cred, && !same_creds(&unconf->cl_cred,
&old->cl_cred)) &old->cl_cred)) {
old = NULL;
goto out; goto out;
}
status = mark_client_expired_locked(old); status = mark_client_expired_locked(old);
if (status) { if (status) {
old = NULL; old = NULL;