fuse: notify: don't move pages

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>
Cc: stable@vger.kernel.org

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index ed19a7d622fa..b0d7e13fae3d 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1797,6 +1797,9 @@ 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);