Re: [PATCH] thunderbolt: Validate BAR 0 resource type and size

[Greg KH]

On Wed, Aug 26, 2026 at 06:39:29AM +0200, Mika Westerberg wrote:
> Hi,
> 
> On Tue, Aug 25, 2026 at 04:09:37PM +0000, syzbot wrote:
> > From: Marco Elver <elver@xxxxxxxxxx>
> > 
> > The thunderbolt driver can crash with a page fault if it binds to an
> > arbitrary PCI device (e.g., via sysfs driver_override) that has an I/O port
> > BAR at index 0 instead of an MMIO BAR.
> 
> Well, if you bind it to a random PCIe device you get what you asked for.
> This is specifically the reason we have the PCI IDs and the like in the
> drivers. Anything outside of that you need to know what you are doing.
> 

And again, I keep telling the syzbot people that this is not a valid
thing to care about...