Braino introduced in "switch the remnants of releasing the mountpoint away from fs_pin"; the most visible result is leaking struct mount when mounting btrfs, making it impossible to shut down. The following changes since commit 18253e034d2aeee140f82fc9fe89c4bce5c81799: Merge branch 'work.dcache2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs (2019-07-20 09:15:51 -0700) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git fixes for you to fetch changes up to 19a1c4092e7ca1ad1a72ac5535f902c483372cd5: fix the struct mount leak in umount_tree() (2019-07-26 07:59:06 -0400) ---------------------------------------------------------------- Al Viro (1): fix the struct mount leak in umount_tree() fs/namespace.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)