diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2025-05-23 19:20:36 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2025-05-26 17:35:32 -0400 |
| commit | 3b5260d12b1fe76b566fe182de8abc586b827ed0 (patch) | |
| tree | 2a01faf26260c35ca94d34b8ba2f25e886dbe38e /fs/pnode.c | |
| parent | d1ddc6f1d9f0cf887834eb54a5a68bbfeec1bb77 (diff) | |
Don't propagate mounts into detached trees
All versions up to 6.14 did not propagate mount events into detached
tree. Shortly after 6.14 a merge of vfs-6.15-rc1.mount.namespace
(130e696aa68b) has changed that.
Unfortunately, that has caused userland regressions (reported in
https://lore.kernel.org/all/CAOYeF9WQhFDe+BGW=Dp5fK8oRy5AgZ6zokVyTj1Wp4EUiYgt4w@mail.gmail.com/)
Straight revert wouldn't be an option - in particular, the variant in 6.14
had a bug that got fixed in d1ddc6f1d9f0 ("fix IS_MNT_PROPAGATING uses")
and we don't want to bring the bug back.
This is a modification of manual revert posted by Christian, with changes
needed to avoid reintroducing the breakage in scenario described in
d1ddc6f1d9f0.
Cc: stable@vger.kernel.org
Reported-by: Allison Karlitskaya <lis@redhat.com>
Tested-by: Allison Karlitskaya <lis@redhat.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Co-developed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/pnode.c')
| -rw-r--r-- | fs/pnode.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/pnode.c b/fs/pnode.c index fb77427df39e..ffd429b760d5 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -231,8 +231,8 @@ static int propagate_one(struct mount *m, struct mountpoint *dest_mp) /* skip if mountpoint isn't visible in m */ if (!is_subdir(dest_mp->m_dentry, m->mnt.mnt_root)) return 0; - /* skip if m is in the anon_ns we are emptying */ - if (m->mnt_ns->mntns_flags & MNTNS_PROPAGATING) + /* skip if m is in the anon_ns */ + if (is_anon_ns(m->mnt_ns)) return 0; if (peers(m, last_dest)) { |