CVE-2022-48862 vhost: fix hung thread due to erroneous iotlb entries

In the Linux kernel, the following vulnerability has been resolved: vhost: fix hung thread due to erroneous iotlb entries In vhostiotlbaddrangectx, range size can overflow to 0 when start is 0 and last is ULONGMAX. One instance where it can happen is when userspace sends an IOTLB message with...

CVE-2022-48862

The CVE-2022-48862 vulnerability is in the Linux kernel vhost/vhost.c and related vhost/vsock.c handling of IOTLB entries. The root cause is a range-size overflow in vhost_iotlb_add_range_ctx(): when start = 0 and last = ULONG_MAX, an entry with size = 0 is created, and subsequent packet processi...