On Wed, Mar 03, 2021 at 10:38:45AM +0100, Marco Elver wrote:
Commit 56348560d495 ("debugfs: do not attempt to create a new file before the filesystem is initalized") forbids creating new debugfs files until debugfs is fully initialized. This breaks KCSAN's debugfs file creation, which happened at the end of __init().
How did it "break" it? The files shouldn't have actually been created, right?
There is no reason to create the debugfs file during early initialization. Therefore, move it into a late_initcall() callback.
Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: stable stable@vger.kernel.org Fixes: 56348560d495 ("debugfs: do not attempt to create a new file before the filesystem is initalized") Signed-off-by: Marco Elver elver@google.com
I've marked this for 'stable', since 56348560d495 is also intended for stable, and would subsequently break KCSAN in all stable kernels where KCSAN is available (since 5.8).
No objection from me, just odd that this actually fixes anything :)
Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org