[PATCH] arm/arm64: KVM: Feed initialized memory to MMIO accesses

On 24/02/16 11:40, Christoffer Dall wrote:

On Wed, Feb 17, 2016 at 03:34:20PM +0000, Marc Zyngier wrote:

quoted

On an MMIO access, we always copy the on-stack buffer info
the shared "run" structure, even if this is a read access.
This ends up leaking up to 8 bytes of uninitialized memory
into userspace.

I think it only leaks 'len' bytes to userspace ;)

quoted

An obvious fix for this one is to only perform the copy if
this is an actual write.

Reviewed-by: Christoffer Dall <redacted>

Thanks. I've pushed this onto master, with a view of sending a PR to
Paolo this evening (hopefully the last one for this cycle).

	M.
-- 
Jazz is not dead. It just smells funny...