[Devel] Re: [PATCH RESEND 2/2] Fix some kallsyms_lookup() vs rmmod races

[Ingo Molnar]

* Alexey Dobriyan <adobriyan at sw.ru> wrote:

> [cc'ing folks whose proc files are affected]
> 
> kallsyms_lookup() can call module_address_lookup() which iterates over 
> modules list without module_mutex taken. Comment at the top of 
> module_address_lookup() says it's for oops resolution so races are 
> irrelevant, but in some cases it's reachable from regular code:

looking at the problem from another angle: wouldnt this be something 
that would benefit from freeze_processes()/unfreeze_processes(), and 
hence no locking would be required?

	Ingo