[PATCH 1/2] drm/i915: fix integer overflow in i915_gem_execbuffer2()

[Xi Wang]

On Apr 6, 2012, at 9:36 AM, Chris Wilson wrote:

> On Fri,  6 Apr 2012 08:58:18 -0400, Xi Wang <xi.wang at gmail.com> wrote:
>> A large args->buffer_count from userspace may overflow the allocation
>> size, leading to out-of-bounds access.
>> 
>> Use kmalloc_array() to avoid that.
> 
> I can safely say that exec list larger than 4GiB is going to be an
> illegal operation and would rather the ioctl failed outright with
> EINVAL.

On 32-bit platform?

- xi