Re: [PATCH -next] tpm: change the return type of calc_tpm2_event_size to size_t

From: Jarkko Sakkinen
Date: Tue Feb 19 2019 - 12:31:27 EST

On Tue, Feb 19, 2019 at 09:34:56AM -0700, Jason Gunthorpe wrote:
> > - Your real name is formatted incorrectly. It should be like "Yue Haibig"
> > as shown in [1].
> > - If there is no actual regression, this change is useless.
> Clarity of the code is a laudible goal - not everything is about
> fixing bugs or adding features.
> It is much easier to write the code properly than to try and prove
> that event_size can not exceed INT_MAX.

I think it is actually a regression in 4d23cc323cdb. Should carry a
fixes tag. I did not quite undersand what commit message was saying.
What it should would just

tpm: Fix the type of the return value in calc_tpm2_event_size()

calc_tpm2_event_size() has an invalid signature because it returns a 'size_t'
where as its signature says that it returns 'int'.

Should be also Cc'd to linux-security-module and have cc to stable.