netdev - Re: [PATCH] [stable pre-4.8] can: bcm: check timer values before ktime conversion

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Message-ID: <20190127193411.GB25051@kroah.com>
Date:   Sun, 27 Jan 2019 20:34:11 +0100
From:   Greg KH <greg@...ah.com>
To:     Oliver Hartkopp <socketcan@...tkopp.net>
Cc:     Sasha Levin <sashal@...nel.org>, davem@...emloft.net,
        netdev@...r.kernel.org, stable@...r.kernel.org,
        linux-can@...r.kernel.org, lifeasageek@...il.com,
        threeearcat@...il.com, syzkaller@...glegroups.com,
        nautsch2@...il.com, Kyungtae Kim <kt0755@...il.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: Re: [PATCH] [stable pre-4.8] can: bcm: check timer values before
 ktime conversion

On Sun, Jan 27, 2019 at 07:22:38PM +0100, Oliver Hartkopp wrote:
> Hi Sasha,
> 
> On 26.01.19 19:17, Sasha Levin wrote:
> > On Thu, Jan 24, 2019 at 10:08:42AM +0100, Oliver Hartkopp wrote:
> > > Kyungtae Kim detected a potential integer overflow in bcm_[rx|tx]_setup()
> > > when the conversion into ktime multiplies the given value with
> > > NSEC_PER_USEC
> > > (1000).
> > > 
> > > Reference: https://marc.info/?l=linux-can&m=154732118819828&w=2
> > > 
> > > Add a check for the given tv_usec, so that the value stays below one
> > > second.
> > > Additionally limit the tv_sec value to a reasonable value for CAN related
> > > use-cases of 400 days and ensure all values to be positive.
> > > 
> > > This patch is the pre-4.8 version of upstream commit 93171ba6f1deffd8
> > 
> > I can't find this commit id upstream, there's nothing with the same
> > subject name, nor does this code exist upstream. What's going on?
> 
> Here we are (pulled by Linus some minutes ago):
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93171ba6f1deffd82f381d36cb13177872d023f6
> 
> Can you go with this pre-4.8 version now?

Let me get the others into the newer kernels first please :)
Should be a day or so at most...

thanks,

greg k-h