Re: [Intel-gfx] [PATCH] drm/dp/mst: Remove port after removing connector.

On 11 August 2015 at 17:54, Maarten Lankhorst maarten.lankhorst@linux.intel.com wrote:

The port is removed synchronously, but the connector delayed. This causes a use after free which can cause a kernel BUG with slug_debug=FPZU. This is fixed by freeing the port after the connector.

Where is the use after free btw? I'm not sure I like delaying the port destruction, there should be no need to.

The connector->port pointer shouldn't be used without validation anywhere, and if it is that is a bug.

I'd like to reproduce this before pulling this in.

Dave.