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Date: Fri, 06 Apr 2012 14:36:40 +0100 From: Chris Wilson <chris@...is-wilson.co.uk> To: Xi Wang <xi.wang@...il.com>, Keith Packard <keithp@...thp.com>, Daniel Vetter <daniel.vetter@...ll.ch> Cc: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org Subject: Re: [PATCH 1/2] drm/i915: fix integer overflow in i915_gem_execbuffer2() On Fri, 6 Apr 2012 08:58:18 -0400, Xi Wang <xi.wang@...il.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. -Chris -- Chris Wilson, Intel Open Source Technology Centre -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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