Gerd Hoffmann 05a40b172e usb: limit combined packets to 1 MiB (CVE-2021-3527) ...

usb-host and usb-redirect try to batch bulk transfers by combining many
small usb packets into a single, large transfer request, to reduce the
overhead and improve performance.

This patch adds a size limit of 1 MiB for those combined packets to
restrict the host resources the guest can bind that way.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20210503132915.2335822-6-kraxel@redhat.com>

2021-05-05 15:06:01 +02:00

6.6 KiB

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