CVE-2022-49972

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> xsk: Fix corrupted packets for XDP_SHARED_UMEM<br /> <br /> Fix an issue in XDP_SHARED_UMEM mode together with aligned mode where<br /> packets are corrupted for the second and any further sockets bound to<br /> the same umem. In other words, this does not affect the first socket<br /> bound to the umem. The culprit for this bug is that the initialization<br /> of the DMA addresses for the pre-populated xsk buffer pool entries was<br /> not performed for any socket but the first one bound to the umem. Only<br /> the linear array of DMA addresses was populated. Fix this by populating<br /> the DMA addresses in the xsk buffer pool for every socket bound to the<br /> same umem.