CVE-2023-54008

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> virtio_vdpa: build affinity masks conditionally<br /> <br /> We try to build affinity mask via create_affinity_masks()<br /> unconditionally which may lead several issues:<br /> <br /> - the affinity mask is not used for parent without affinity support<br /> (only VDUSE support the affinity now)<br /> - the logic of create_affinity_masks() might not work for devices<br /> other than block. For example it&amp;#39;s not rare in the networking device<br /> where the number of queues could exceed the number of CPUs. Such<br /> case breaks the current affinity logic which is based on<br /> group_cpus_evenly() who assumes the number of CPUs are not less than<br /> the number of groups. This can trigger a warning[1]:<br /> <br /> if (ret &gt;= 0)<br /> WARN_ON(nr_present + nr_others