From: Kirill Tkhai <ktkhai@virtuozzo.com>
Date: Mon, 27 Aug 2018 18:29:29 +0300
Subject: fuse: use READ_ONCE on congestion_threshold and max_background
Git-commit: 2a23f2b8adbe4bd584f936f7ac17a99750eed9d7
Patch-mainline: v4.20-rc1
References: bsc#1206117

Since they are of unsigned int type, it's allowed to read them
unlocked during reporting to userspace. Let's underline this fact
with READ_ONCE() macroses.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Luis Henriques <lhenriques@suse.com>

---
 fs/fuse/control.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 0b694655d988..acc35819aae6 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -107,7 +107,7 @@ static ssize_t fuse_conn_max_background_read(struct file *file,
 	if (!fc)
 		return 0;
 
-	val = fc->max_background;
+	val = READ_ONCE(fc->max_background);
 	fuse_conn_put(fc);
 
 	return fuse_conn_limit_read(file, buf, len, ppos, val);
@@ -144,7 +144,7 @@ static ssize_t fuse_conn_congestion_threshold_read(struct file *file,
 	if (!fc)
 		return 0;
 
-	val = fc->congestion_threshold;
+	val = READ_ONCE(fc->congestion_threshold);
 	fuse_conn_put(fc);
 
 	return fuse_conn_limit_read(file, buf, len, ppos, val);