From: Trond Myklebust Date: Fri, 3 Nov 2017 12:00:15 +0000 (-0400) Subject: nfsd: Ensure we check stateid validity in the seqid operation checks X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=9271d7e509c1bfc0b9a418caec29ec8d1ac38270;p=openwrt%2Fstaging%2Fblogic.git nfsd: Ensure we check stateid validity in the seqid operation checks After taking the stateid st_mutex, we want to know that the stateid still represents valid state before performing any non-idempotent actions. Signed-off-by: Trond Myklebust Signed-off-by: J. Bruce Fields --- diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 6d5993caf9bc..da07c24e9372 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -5234,15 +5234,9 @@ static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_ status = nfsd4_check_seqid(cstate, sop, seqid); if (status) return status; - if (stp->st_stid.sc_type == NFS4_CLOSED_STID - || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) - /* - * "Closed" stateid's exist *only* to return - * nfserr_replay_me from the previous step, and - * revoked delegations are kept only for free_stateid. - */ - return nfserr_bad_stateid; - mutex_lock(&stp->st_mutex); + status = nfsd4_lock_ol_stateid(stp); + if (status != nfs_ok) + return status; status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); if (status == nfs_ok) status = nfs4_check_fh(current_fh, &stp->st_stid);