Re: [PATCH V2 1/3] kvm: use kmalloc() instead of kzalloc() during iodev register/unregister

From: Jason Wang
Date: Wed Aug 26 2015 - 01:39:38 EST

On 08/25/2015 11:29 PM, Joe Perches wrote:
> On Tue, 2015-08-25 at 15:47 +0800, Jason Wang wrote:
>> > All fields of kvm_io_range were initialized or copied explicitly
>> > afterwards. So switch to use kmalloc().
> Is there any compiler added alignment padding
> in either structure? If so, those padding
> areas would now be uninitialized and may leak
> kernel data if copied to user-space.

I get your concern, but I don't a way to copy them to userspace, did you?
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