CVE-2023-53273

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Drivers: vmbus: Check for channel allocation before looking up relids<br /> <br /> relid2channel() assumes vmbus channel array to be allocated when called.<br /> However, in cases such as kdump/kexec, not all relids will be reset by the host.<br /> When the second kernel boots and if the guest receives a vmbus interrupt during<br /> vmbus driver initialization before vmbus_connect() is called, before it finishes,<br /> or if it fails, the vmbus interrupt service routine is called which in turn calls<br /> relid2channel() and can cause a null pointer dereference.<br /> <br /> Print a warning and error out in relid2channel() for a channel id that&amp;#39;s invalid<br /> in the second kernel.