diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index c16ccb403a8d..f4884827b7a0 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -3125,9 +3125,22 @@ nfsd4_proc_compound(struct svc_rqst *rqstp) op->status = nfsd4_open_omfg(rqstp, cstate, op); goto encode_op; } - if (!current_fh->fh_dentry && - !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { - if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { + if (!current_fh->fh_dentry) { + if (HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { + /* + * FOREIGN fh from inter-SSC PUTFH: only + * SAVEFH may proceed with a NULL fh_dentry. + * Per RFC 7862 S15.2.3, validation of a + * foreign fh is deferred to the operation + * that consumes it, and NFS4ERR_STALE is + * returned at that point. + */ + if (op->opnum != OP_SAVEFH && + !(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { + op->status = nfserr_stale; + goto encode_op; + } + } else if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { op->status = nfserr_nofilehandle; goto encode_op; }