More stuff caught in mount code audit. There's more, but those'll have to
wait for several days...
A couple of races around legalize_mnt vs. umount (both fairly old and hard to
hit) plus two bugs in move_mount(2) - both around "move detached subtree in
place" logics.
The following changes since commit 92a09c47464d040866cf2b4cd052bc60555185fb:
Linux 6.15-rc5 (2025-05-04 13:55:04 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git tags/pull-fixes
for you to fetch changes up to d1ddc6f1d9f0cf887834eb54a5a68bbfeec1bb77:
fix IS_MNT_PROPAGATING uses (2025-05-09 18:06:27 -0400)
----------------------------------------------------------------
assorted namespace fixes
----------------------------------------------------------------
Al Viro (4):
__legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock
do_umount(): add missing barrier before refcount checks in sync case
do_move_mount(): don't leak MNTNS_PROPAGATING on failures
fix IS_MNT_PROPAGATING uses
fs/namespace.c | 17 +++++++----------
fs/pnode.c | 17 +++++++++--------
fs/pnode.h | 2 +-
3 files changed, 17 insertions(+), 19 deletions(-)
