nfsd41: sanity check client drc maxreqs (5d77ddfb) · Commits · 戴 / test

Ensure the client requested maximum requests are between 1 and NFSD_MAX_SLOTS_PER_SESSION Signed-off-by:

fs/nfsd/nfs4state.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -425,6 +425,11 @@ static int set_forechannel_maxreqs(struct nfsd4_channel_attrs *fchan)
		{
		int status = 0, np = fchan->maxreqs * NFSD_PAGES_PER_SLOT;

		if (fchan->maxreqs < 1)
		return nfserr_inval;
		else if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION)
		fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION;

		spin_lock(&nfsd_serv->sv_lock);
		if (np + nfsd_serv->sv_drc_pages_used > nfsd_serv->sv_drc_max_pages)
		np = nfsd_serv->sv_drc_max_pages - nfsd_serv->sv_drc_pages_used;