linux-kernel - Re: [PATCH] mei: bus: type promotion bug in mei_nfc_if

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Date:   Mon, 9 Jul 2018 14:03:17 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     "Winkler, Tomas" <tomas.winkler@...el.com>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        "Usyskin, Alexander" <alexander.usyskin@...el.com>,
        Arnd Bergmann <arnd@...db.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: Re: [PATCH] mei: bus: type promotion bug in mei_nfc_if_version()

On Mon, Jul 09, 2018 at 11:36:21AM +0000, Winkler, Tomas wrote:
> > 
> > On Wed, Jul 04, 2018 at 12:34:49PM +0300, Dan Carpenter wrote:
> > > We accidentally removed the check for negative returns without
> > > considering the issue of type promotion.  The "if_version_length"
> > > variable is type size_t so if __mei_cl_recv() returns a negative then
> > > "bytes_recv" is type promoted to a high positive value and treated as
> > > success.
> > >
> > > Fixes: 582ab27a063a ("mei: bus: fix received data size check in NFC
> > > fixup")
> > > Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> > 
> > Didn't apply to my tree at all :(
> 
> I will rework this, anyhow I would prefer if you can wait for my signoff before applying, 
> I believe we are reasonably responsive. 

Yes you are, but for trusted developers, it's fine to merge their stuff
as well.  Remember, maintainers are not "gatekeepers" :)

thanks,

greg k-h