Merge tag 'nfsd-6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - Fix an export leak

 - Fix a potential tracepoint crash

* tag 'nfsd-6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: put the export reference in nfsd4_verify_deleg_dentry
  nfsd: fix use-after-free in nfsd_file_do_acquire tracepoint

Author: torvalds

fs/nfsd/filecache.c

@@ -1076,6 +1076,7 @@ nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
 		goto open_file;
 
 	nfsd_file_slab_free(&nf->nf_rcu);
+	nf = NULL;
 	if (ret == -EEXIST)
 		goto retry;
 	trace_nfsd_file_insert_err(rqstp, key.inode, may_flags, ret);

fs/nfsd/nfs4state.c

@@ -5382,6 +5382,7 @@ nfsd4_verify_deleg_dentry(struct nfsd4_open *open, struct nfs4_file *fp,
 	if (err)
 		return -EAGAIN;
 
+	exp_put(exp);
 	dput(child);
 	if (child != file_dentry(fp->fi_deleg_file->nf_file))
 		return -EAGAIN;