UBUNTU-CVE-2026-93283: Medium severity ubuntu/linux-hwe-edge vulnerability

In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix deviceregister() error path When deviceregister() fails in i3cmasterregisternewi3cdevs(), putdevice() is called to drop the reference taken by deviceregister(). That drops the last reference, so the device's release callback i3cdevicerelease() runs and frees the i3cdevice. Two problems follow from that: i3cdevicerelease() does WARNON(i3cdev->desc), so it warns because desc->dev->desc still points back at the descriptor. Clear it before calling putdevice(). After putdevice() frees the i3cdevice, desc->dev is left pointing at freed memory, so clear desc->dev as well. That prevents, for example, i3cmasterunregisteri3cdevs() seeing desc->dev as non-NULL and dereferencing it.