From ea236d0704b9b9e7742b107313bbdddbba62724a Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Sat, 12 May 2012 21:08:41 -0400 Subject: [PATCH] nfsd4: exchange_id: check creds before killing confirmed client We mustn't allow a client to destroy another client with established state unless it has the right credential. And some minor cleanup. (Note: our comparison of credentials is actually pretty bogus currently; that will need to be fixed in another patch.) Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index aca84c942595..f372a6edef34 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1556,6 +1556,14 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, status = nfserr_clid_inuse; /* XXX: ? */ goto out; } + if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { + /* 18.35.4 case 9 */ + if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) + status = nfserr_perm; + else /* case 3 */ + status = nfserr_clid_inuse; + goto out; + } if (!same_verf(&verf, &conf->cl_verifier)) { /* 18.35.4 case 8 */ if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { @@ -1566,15 +1574,6 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, expire_client(conf); goto out_new; } - if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { - /* 18.35.4 case 9 */ - if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { - status = nfserr_perm; - goto out; - } - expire_client(conf); - goto out_new; - } /* * Set bit when the owner id and verifier map to an already * confirmed client id (18.35.3). -- 2.39.5