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authorMi Jinlong <mijinlong@cn.fujitsu.com>2011-07-14 14:56:02 +0800
committerJ. Bruce Fields <bfields@redhat.com>2011-07-15 19:00:00 -0400
commitae82a8d06fee573def55b63868b1ea109461a531 (patch)
tree4d5878b9e2af9945cb823e1d1282c63b30c618f9 /fs/nfsd
parent1b74c25bc1a142ee8dd7ad080e2a974f28d1cb18 (diff)
downloadlinux-ae82a8d06fee573def55b63868b1ea109461a531.tar.bz2
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 <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4state.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index fe4ba68886d8..6a471af99dfd 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;