From ae82a8d06fee573def55b63868b1ea109461a531 Mon Sep 17 00:00:00 2001 From: Mi Jinlong Date: Thu, 14 Jul 2011 14:56:02 +0800 Subject: nfsd41: check the size of request Check in SEQUENCE that the request doesn't exceed maxreq_sz for the given session. Signed-off-by: Mi Jinlong Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index fe4ba68886d..6a471af99df 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -1762,6 +1762,14 @@ static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_sess return args->opcnt > session->se_fchannel.maxops; } +static bool nfsd4_request_too_big(struct svc_rqst *rqstp, + struct nfsd4_session *session) +{ + struct xdr_buf *xb = &rqstp->rq_arg; + + return xb->len > session->se_fchannel.maxreq_sz; +} + __be32 nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, @@ -1794,6 +1802,10 @@ nfsd4_sequence(struct svc_rqst *rqstp, if (nfsd4_session_too_many_ops(rqstp, session)) goto out; + status = nfserr_req_too_big; + if (nfsd4_request_too_big(rqstp, session)) + goto out; + status = nfserr_badslot; if (seq->slotid >= session->se_fchannel.maxreqs) goto out; -- cgit v1.2.3