panic in ffs_init_vnode(?)

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Hi!

I had a panic on 8.99.37/amd64 (kernel from a couple hours ago) last
night, usual setup: pbulk with 2 sandboxes on tmpfs, probably high
memory pressure, perhaps one of the standard daily/weekly cronjobs
running.

gdb does not give me a reasonable backtrace.

Here's the panic message from syslog after reboot:

Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NnOeTt bLsOdW:EpRoEoDl O_Ng rToRwAP+ 0ExXdI6T 
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] 6 0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 65 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] pool_catchup() at WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 16 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWnEeRtEbDs dO:N pToRoAlP_ cEaXtIcTh u6p 0+
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] 0x46
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 53 times
Apr 22 03:17:47 yt /netbsd: [ 124[74 .1725487140.2785]8 1p0o2o8l]_ gWeAtR(NI)N Ga:t  SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 10 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NnOTe tLbOsWdE:RpEoDo lO_Ng eTtRA+P0 xE9X7I8T
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028]  6 0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 53 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNINGa: lSlPoLc bNuOfT( L)O WaEtR ED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 10 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXInTe t6b s0d
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] :allocbuf+0x11a
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 54 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] getblk(W)A RaNtI NG: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 10 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WA[R N1I2N4G7:4 .S7P5L8 1N0O2T8 ]L OnWeEtRbEsDd :OgNe tTbRlAkP +E0XxI1T8 46
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028]  0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 61 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WAbRNiIoN_G:d oSrPeLa dN(O)T  aLtOW ERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 14 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] netbsd:bio_doread+0x1b
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 51 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ObN rTeRaAdP( )E XaItT  6 0
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] WARNING: SPL NOT LOWERED ON TRAP EXIT 6 0
Apr 22 03:17:47 yt syslogd[197]: last message repeated 2 times
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] netbsd:bread+0x18
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] ffs_init_vnode() at netbsd:ffs_init_vnode+0x1c7
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] ffs_loadvnode() at netbsd:ffs_loadvnode+0xd3
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] vcache_get() at netbsd:vcache_get+0x5c5
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] ufs_lookup() at netbsd:ufs_lookup+0x1415
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] VOP_LOOKUP() at netbsd:VOP_LOOKUP+0xec
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] lookup_once() at netbsd:lookup_once+0x339
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] namei_tryemulroot() at netbsd:namei_tryemulroot+0xc51
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] namei() at netbsd:namei+0x65
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] fd_nameiat.isra.2() at netbsd:fd_nameiat.isra.2+0xd9
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] do_sys_statat() at netbsd:do_sys_statat+0x182
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] sys___lstat50() at netbsd:sys___lstat50+0x85
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] syscall() at netbsd:syscall+0x348
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] --- syscall (number 441) ---
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] 79cafcd8f01a:
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] cpu9: End traceback...
Apr 22 03:17:47 yt /netbsd: 
Apr 22 03:17:47 yt /netbsd: [ 12474.7581028] dumping to dev 168,3 (offset=8, size=8373576):


Here's my try with gdb:

# gdb netbsd.gdb
GNU gdb (GDB) 8.0.1
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64--netbsd".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from netbsd.gdb...tardone.
(gdb) target kvm netbsd.136.core
_kvm_kvatop(40)
(gdb) bt
_kvm_kvatop(40)
(gdb)

Any ideas on the panic or gdb?
 Thomas