kern/53818: NetBSD 8.99.29 panics probably due to radeon

[triaxx%NetBSD.org@localhost]

>Number:         53818
>Category:       kern
>Synopsis:       NetBSD 8.99.29 panics probably due to radeon
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Dec 30 09:25:00 +0000 2018
>Originator:     Frédéric Fauberteau
>Release:        NetBSD 8.99.29
>Organization:
>Environment:
System: NetBSD hydralisk 8.99.29 NetBSD 8.99.29 (DEBUG) #0: Sat Dec 29 13:24:18 UTC 2018 root@hydralisk:/mnt/nbsd9/usr/obj/sys/arch/amd64/compile/DEBUG amd64
Architecture: x86_64
Machine: amd64
>Description:
NetBSD current panics and I suppose the problem comes from my radeon because I have a warning 'no /dev/console' (see below) just after radeon message and just before panic.

It works fine on NetBSD-8.0 but I noticed that modular Xorg stops to work for me from 1.20.0. It seems that upstream are introducing regression for the board I use but I don't know yet where I have to send a bug report.

================================================================================
#
# radeon hardware
#
================================================================================
# pcictl /dev/pci0 list | grep Radeon
001:05:0: ATI Technologies Radeon HD 3200 (VGA display)

I tried to use ddb but the howto provided at https://wiki.netbsd.org/users/haad/ddb_howto/ didn't work for me. The -g option was not available for addr2line. I replaced it by -e, but I obtained ??:?

Sorry, I have not the full dmesg because I have no serial line (I need to buy serial2usb):
================================================================================
#
# partial dmesg
#
================================================================================
radeondrmkmsfb0 at radeon0
radeon0: info: registered panic notifier
radeondrmkmsfb0: framebuffer at 0xffff800063fa0000, size 1680x1050, depth 32, stride 6912
warning: no /dev/console
panic: init died (signal 0, exit 11)
fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip 0xffffffff8021dc35 cs 0x8 rflags 0x246 cr2 0x78ec18748000 ilevel  rsp 0xffff800063b9dd20
curlwp 0xfffffe8107259680 pid 1.1 lowest kstack 0xffff800063b992c0
Stopped in pid 1.1 (init) at    netbsd:breakpoint+0x5:   leave
db{0}> bt
breakpoint() at netbsd:breakpoint+0x5
vpanic() at netbsd:vpanic+0x15d
snprintf() at netbsd:snprintf
exit1() at netbsd:exit1+0x694
sys_exit() at netbsd:sys_exit+0x3d
syscall() at netbsd:syscall+0x208
--- syscall (number 1) ---
78ec17d1ef1a:
db{0}>
>How-To-Repeat:
Boot on NetBSD-current with this platform.
>Fix:
Reboot on NetBSD-8.0 but it is quite annoying.