From cc1b20590cf4505e04b8c221d1d950e45110f5f0 Mon Sep 17 00:00:00 2001
From: Andrei Vagin <avagin@google.com>
Date: Fri, 13 Nov 2020 00:46:16 -0800
Subject: fs/tmpfs: use atomic operations to access inode.mode

PiperOrigin-RevId: 342214859
---
 pkg/sentry/fsimpl/tmpfs/tmpfs.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'pkg/sentry')

diff --git a/pkg/sentry/fsimpl/tmpfs/tmpfs.go b/pkg/sentry/fsimpl/tmpfs/tmpfs.go
index c5a131d5d..0c9c639d3 100644
--- a/pkg/sentry/fsimpl/tmpfs/tmpfs.go
+++ b/pkg/sentry/fsimpl/tmpfs/tmpfs.go
@@ -631,7 +631,8 @@ func (i *inode) direntType() uint8 {
 }
 
 func (i *inode) isDir() bool {
-	return linux.FileMode(i.mode).FileType() == linux.S_IFDIR
+	mode := linux.FileMode(atomic.LoadUint32(&i.mode))
+	return mode.FileType() == linux.S_IFDIR
 }
 
 func (i *inode) touchAtime(mnt *vfs.Mount) {
-- 
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