Re: [PATCH] driver core: Fix locking bug in deferred_probe_timeout_work_func()

[Greg Kroah-Hartman]

On Mon, Apr 12, 2021 at 11:09:06AM -0700, Saravana Kannan wrote:
> commit eed6e41813deb9ee622cd9242341f21430d7789f upstream.
> 
> list_for_each_entry_safe() is only useful if we are deleting nodes in a
> linked list within the loop. It doesn't protect against other threads
> adding/deleting nodes to the list in parallel. We need to grab
> deferred_probe_mutex when traversing the deferred_probe_pending_list.
> 
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 25b4e70dcce9 ("driver core: allow stopping deferred probe after init")
> Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
> Link: https://lore.kernel.org/r/20210402040342.2944858-2-saravanak@xxxxxxxxxx
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
> Hi Greg,
> 
> This should apply cleanly to 4.19 and 5.4 if you think this should be
> picked up.

thanks, now queued up.

greg k-h