Kernel Panic On Boot after r327979

[Pete Wright]

Hello,

I updated an amd64 system last night to r327979 and it panics into gdb
after rc attempts to mount local filesystems.

The panic line is:
Fatal trap 12: page fault while in kernel mode

gdb states that it stopped at:
Stopped at    prison_allow+0x4    movq    0x30(%rdi),%rax


Is this a known issue?  This is my primary workstation - so I'm going to
revert back to an older kernel, but if more info is needed I can put
some cycles into debugging today.

Cheers!
-pete

[Pete Wright]

Post by Pete Wright
Hello,
I updated an amd64 system last night to r327979 and it panics into gdb
after rc attempts to mount local filesystems.
Fatal trap 12: page fault while in kernel mode
Stopped at    prison_allow+0x4    movq    0x30(%rdi),%rax
Is this a known issue?  This is my primary workstation - so I'm going
to revert back to an older kernel, but if more info is needed I can
put some cycles into debugging today.

closing the loop on this.  it looks like the panic was due to debugfs
being mounted on my system.  debugfs is part of the drm-next-kmod port
which enables i915 gfx on recent intel GPU's, and debugfs doesn't *need*
to be mounted but is quite useful and fun to play with.

anywho - the fix on my end is to:
- remove the drm-next-kmod port/pkg
- build and install latest kernel+world
- reboot and build/install the drm-next-kmod port/pkg
- reboot and enjoy i915 graphics

i'm kinda interested in what prison_allow does now as i haven't run
across it before.  is this part of the jails infrastrucutre?

cheers,
-p