fuse: add missing FR_FORCE

fuse_file_put() was missing the "force" flag for the RELEASE request when
sending synchronously (fuseblk).

If this flag is not set, then a sync request may be interrupted before it
is dequeued by the userspace filesystem.  In this case the OPEN won't be
balanced with a RELEASE.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 5a18ec176c93 ("fuse: fix hang of single threaded fuseblk filesystem")
Cc: <stable@vger.kernel.org> # v2.6.38+

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 2401c5dabb2a227b6511be01b1589ffa5180e636..5ec5870e423ab5539b7785fe68588660a8375b32 100644 (file)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -100,6 +100,7 @@ static void fuse_file_put(struct fuse_file *ff, bool sync)
                        iput(req->misc.release.inode);
                        fuse_put_request(ff->fc, req);
                } else if (sync) {
+                       __set_bit(FR_FORCE, &req->flags);
                        __clear_bit(FR_BACKGROUND, &req->flags);
                        fuse_request_send(ff->fc, req);
                        iput(req->misc.release.inode);