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Message-ID: <1166411830.411906.1520834284931@email.1und1.de>
Date: Mon, 12 Mar 2018 06:58:04 +0100 (CET)
From: Stefan Wahren <stefan.wahren@...e.com>
To: Eric Anholt <eric@...olt.net>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Tobin C. Harding" <me@...in.cc>
Cc: Tycho Andersen <tycho@...ho.ws>, driverdev-devel@...uxdriverproject.org,
Kees Cook <keescook@...omium.org>,
kernel-hardening@...ts.openwall.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] staging: vchiq_arm: Clear VLA warning
Hi Tobin,
> "Tobin C. Harding" <me@...in.cc> hat am 12. März 2018 um 06:46 geschrieben:
>
>
> On Mon, Mar 12, 2018 at 12:37:53PM +1100, Tobin C. Harding wrote:
> > The kernel would like to have all stack VLA usage removed[1]. The array
> > here is fixed (declared with a const variable) but it appears like a VLA
> > to the compiler. Also, currently we are putting 768 bytes on the
> > stack. This function is only called on the error path so performance is
> > not critical, let's just allocate the memory instead of using the
> > stack. This saves stack space and removes the VLA build warning.
> >
> > kmalloc a buffer for dumping state instead of using the stack.
> >
> > [1]: https://lkml.org/lkml/2018/3/7/621
> >
> > Signed-off-by: Tobin C. Harding <me@...in.cc>
> > ---
>
> Drop this please, leaks memory.
except from the leak, did you test this patch on a RPi?
Thanks
Stefan
>
> thanks,
> Tobin.
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