Re: [PATCH v2] media: rockchip/rga: fix potential use after free

From: Ezequiel Garcia
Date: Mon Nov 11 2019 - 07:03:29 EST

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In reply to: Pan Bian: "[PATCH v2] media: rockchip/rga: fix potential use after free"
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Hi Pan Bian,

Thanks for the patch.

On Mon, 2019-11-11 at 16:28 +0800, Pan Bian wrote:
> The variable vga->vfd is an alias for vfd. Therefore, releasing vfd and
> then unregister vga->vfd will lead to a use after free bug. In fact, the
> free operation and the unregister operation are reversed.
>

Out of curiosity, how did you find this potential bug?

Acked-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>

Regards,
Ezequiel

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