On 5/24/20 9:43 AM, Guenter Roeck wrote:
> On 5/24/20 8:30 AM, Greg Kroah-Hartman wrote:
>> Sometimes it is better to unregister individual nodes instead of trying
>> to do them all at once with software_node_unregister_nodes(), so create
>> software_node_unregister() so that you can unregister them one at a
>> time.
>>
>> This is especially important when creating nodes in a hierarchy, with
>> parent -> children representations. Children always need to be removed
>> before a parent is, as the swnode logic assumes this is going to be the
>> case.
>>
>> Fix up the lib/test_printf.c fwnode_pointer() test which to use this new
>> function as it had the problem of tearing things down in the backwards
>> order.
>>
>> Fixes: f1ce39df508d ("lib/test_printf: Add tests for %pfw printk modifier")
>> Reported-by: Naresh Kamboju <naresh.kamb...@linaro.org>
>> Reported-by: kernel test robot <rong.a.c...@intel.com>
>> Cc: stable <sta...@vger.kernel.org>
>> Cc: Andy Shevchenko <andriy.shevche...@linux.intel.com>
>> Cc: Brendan Higgins <brendanhigg...@google.com>
>> Cc: Dmitry Torokhov <dmitry.torok...@gmail.com>
>> Cc: Heikki Krogerus <heikki.kroge...@linux.intel.com>
>> Cc: Petr Mladek <pmla...@suse.com>
>> Cc: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
>> Cc: Randy Dunlap <rdun...@infradead.org>
>> Cc: Rasmus Villemoes <li...@rasmusvillemoes.dk>
>> Cc: Sakari Ailus <sakari.ai...@linux.intel.com>
>> Cc: Sergey Senozhatsky <sergey.senozhat...@gmail.com>
>> Cc: Steven Rostedt <rost...@goodmis.org>
>> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
>
> Both patches pass my boot tests on arm64 and arm64be (I didn't test any
> others).
> So, FWIW,
>
> Tested-by: Guenter Roeck <li...@roeck-us.net>
>
> I wasn't sure it the two patches replace or fix commit 4ef12f719802 ("kobject:
> Make sure the parent does not get released before its children"), so I tried
> to re-apply 4ef12f719802 on top of the two patches. Unfortunately that still
> results in crashes and UAF messages.
Yes, that kobject patch has been reverted:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e6764aa0e5530066dd969eccea2a1a7d177859a8
and these 2 patches are to be used instead.
thanks.
--
~Randy
