From 792ad632359f14371d5f19354e3ea69c22e0f5d0 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Thu, 26 Feb 2015 11:45:47 +0100
Subject: [PATCH] fuse: notify: don't move pages

commit 0d2783626a53d4c922f82d51fa675cb5d13f0d36 upstream.

fuse_try_move_page() is not prepared for replacing pages that have already
been read.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 fs/fuse/dev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index cf0098d26409..a826913e88ac 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1570,6 +1570,9 @@ copy_finish:
 static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,
 		       unsigned int size, struct fuse_copy_state *cs)
 {
+	/* Don't try to move pages (yet) */
+	cs->move_pages = 0;
+
 	switch (code) {
 	case FUSE_NOTIFY_POLL:
 		return fuse_notify_poll(fc, size, cs);
-- 
2.39.5