[BISECTED] vc4: f309946 crashes the kernel if vc4 can't allocate buffers

[Eric Anholt]

Noralf Trønnes <noralf at tronnes.org> writes:

> The following commit crashes the kernel if vc4 can't allocate buffers:
>
> drm/vc4: Add an ioctl for labeling GEM BOs for summary stats
>
> It boots fine if I give it enough memory: cma=128M
> I'm doing this on a Pi1 with bcm2835_defconfig.

I'm successfully reproducing issues, even without the patch.  I've
reverted it locally and I'm chewing through kmalloc debug stuff, then
I'll unrevert and see what I can find.
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