Re: [RFC PATCH-for-7.2 v3 0/5] hw/display/qxl: Avoid buffer overrun in qxl_phys2virt()

[Stefan Hajnoczi]

On Mon, 28 Nov 2022 at 15:30, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> Since v2:
> - Do not abort checking guest-provided addresses (Stefan)
> - Handle chunked QEMUCursor (Gerd)
>
> Since v1:
> - Moved overrun check in qxl_get_check_slot_offset (Marc-André)
>
> memory_region_get_ram_ptr() returns a host pointer for a
> MemoryRegion. Sometimes we do offset calculation using this
> pointer without checking the underlying MemoryRegion size.
>
> Wenxu Yin reported a buffer overrun in QXL. This series
> aims to fix it. I haven't audited the other _get_ram_ptr()
> uses (yet). Eventually we could rename it _get_ram_ptr_unsafe
> and add a safer helper which checks for overrun.
>
> Worth considering for 7.2?

Merged, thanks!

Stefan