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Commit ae82a8d0 authored by Mi Jinlong's avatar Mi Jinlong Committed by J. Bruce Fields
Browse files

nfsd41: check the size of request 



Check in SEQUENCE that the request doesn't exceed maxreq_sz for the
given session.

Signed-off-by: default avatarMi Jinlong <mijinlong@cn.fujitsu.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 1b74c25b

fs/nfsd/nfs4state.c

+12 −0
Original line number Diff line number Diff line
@@ -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;