Ever since 6.10, my macmini G4 behaved unstable when dealing with lots of I/O activity, such as sync'ing of Gentoo portage tree, unpacking kernel source tarball, building large software packages (or kernel) etc.
After a bit of testing, and patient kernel rebuilding (while crashing) I found the cuplit to be this commit/change https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/diff/?id=09fe2bfa6b83f865126ce3964744863f69a4a030 Exampe of what a opps/panic looks like (and they all look very much alike) https://share.icloud.com/photos/042BHRkrXqPO-fllvpxMFl2CA -- kolla