fuse: writepages: protect secondary requests from fuse file release
All async fuse requests must be supplied with extra reference to a fuse
file. This is necessary to ensure that the fuse file is not released until
all in-flight requests are completed. Fuse secondary writeback requests
must obey this rule as well.
Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index e6fdd59..7e70506 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1505,6 +1505,7 @@
struct fuse_req *next = req->misc.write.next;
req->misc.write.next = next->misc.write.next;
next->misc.write.next = NULL;
+ next->ff = fuse_file_get(req->ff);
list_add(&next->writepages_entry, &fi->writepages);
/*