linux-kernel - [PATCH] nfs: Fix security label length not being reset

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Message-Id: <20200914154958.55451-2-jeffrey.mitchell@starlab.io>
Date:   Mon, 14 Sep 2020 10:49:58 -0500
From:   Jeffrey Mitchell <jeffrey.mitchell@...rlab.io>
To:     Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna.schumaker@...app.com>
Cc:     linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jeffrey Mitchell <jeffrey.mitchell@...rlab.io>
Subject: [PATCH] nfs: Fix security label length not being reset

In nfs_readdir_page_filler(), reset security label buffer length before
every reuse

Signed-off-by: Jeffrey Mitchell <jeffrey.mitchell@...rlab.io>
---
 fs/nfs/dir.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index a12f42e7d8c7..5ff6af4478a5 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -579,6 +579,9 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en
 	xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
 
 	do {
+		if (entry->label)
+			entry->label->len = NFS4_MAXLABELLEN;
+
 		status = xdr_decode(desc, entry, &stream);
 		if (status != 0) {
 			if (status == -EAGAIN)
-- 
2.25.1