12.0-RC1 drm_atomic panic (supervisor read data, protection violation)

Mon Nov 19 19:45:29 UTC 2018

On Mon, 19 Nov 2018 18:37:18 +0100 matias at pizarro.net wrote:
> gist URL: 
> https://gist.github.com/rebost/1a2bbfc45e9273ae5a76a98c3a67a23d

The problem is in the linux_sendmsg syscall.  It's not drm related.
I've committed a fix a few hours ago:
https://svnweb.freebsd.org/changeset/base/340631

I'll ask to have it included in 12-RC2, but since you were tracking
12-CURRENT maybe you could upgrade to 13-CURRENT?