Recent NetBSD/amd64 7.99.54 kernel panic

[Ryo ONODERA <ryo_on%yk.rim.or.jp@localhost>]

Hi,

Recent NetBSD/amd64 kernel panics with the following message
(manually transcripted).
Could anyone investigate this?
Thank you.

stack overflow detected: terminated
fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip ffffffff80115455 cs 8 rflag 246 cr2 79b90fe688f0 ilevel 4 rsp fffffe810e688a70
curlwp0xfffffe8220f32460 pid 0.3lowes kstack 0xfffffe810e6852c0
Stopped in pid 0.3 (system) at  netbsd:breakpoint+0x05:  leave
db{0}> bt
breakpoint() at netbsd:breakpoint+0x05
vpanic() at netbsd:vpanic+0x140
snprintf() at netbsd:snprintf
ssp_init() at netbsd:ssp_init
tcp_output() at netbsd:tcp_output+0x246e
tcp_input() at netbsd:tcp_input+0x111e
tcp6_input() at netbsd:tcp6_input+0x49
ip6_input() at netbsd:ip6_input+0x724
ip6intr() at netbsd:ip6intr+0x71
softint_dispatch() at netbsd:softint_dispatch+0xda
db{0}> 

--
Ryo ONODERA // ryo_on%yk.rim.or.jp@localhost
PGP fingerprint = 82A2 DC91 76E0 A10A 8ABB  FD1B F404 27FA C7D1 15F3