Re: [PATCH] driver core: Fix use-after-free and double free on glue directory

[Benjamin Herrenschmidt]

On Thu, 2019-04-25 at 23:44 +0800, Muchun Song wrote:
> I agree with you that the looking up of the glue dir and creation of its child
> should be protected by the same lock of gdp_mutex. So, do you agree with
> the fix of the following code snippet?

The basic idea yes, the whole bool *locked is horrid though. Wouldn't it
work to have a get_device_parent_locked that always returns with the mutex held,
or just move the mutex to the caller or something simpler like this ?

Ben.