Re: [PATCH v2] ocfs2/dlm: Protect the recovery list during debugfs reads

[Christian Brauner]

On Sun, 11 Oct 2026 23:35:06 +0800, Cen Zhang wrote:
> Recovery participant records must remain alive while debug_state_print()
> walks reco.node_data and formats their fields. The formatter holds
> dlm->spinlock, but the recovery participant list is protected by
> dlm_reco_state_lock. In particular, dlm_destroy_recovery_area() detaches
> the list under dlm_reco_state_lock and frees the detached records after
> releasing it. A concurrent debugfs open can therefore read freed memory.
> 
> [...]

Applied to the vfs.fixes branch of the vfs/vfs.git tree.
Patches in the vfs.fixes branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.fixes

[1/1] ocfs2/dlm: Protect the recovery list during debugfs reads
      https://git.kernel.org/vfs/vfs/c/6fe32eb34572