Subject: kern/9357: panic: lfs_updatemeta: negative bytes
To: None <gnats-bugs@gnats.netbsd.org>
From: None <jarle@runit.no>
List: netbsd-bugs
Date: 02/05/2000 11:54:16
>Number: 9357
>Category: kern
>Synopsis: panic: lfs_updatemeta: negative bytes
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people (Kernel Bug People)
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sat Feb 5 11:51:00 2000
>Last-Modified:
>Originator: Jarle Greipsland
>Organization:
>Release: 2000-02-02
>Environment:
System: NetBSD honey.runit.sintef.no 1.4R NetBSD 1.4R (HONEY) #13: Wed Feb 2 12:28:44 CET 2000 jarle@honey.runit.sintef.no:/usr/src/sys/arch/alpha/compile/HONEY alpha
>Description:
# lfs_updatemeta: negative bytes (segment 0 short by 512)
lfs_updatemeta: ino 87, lbn 0, addr = 7fa
panic: lfs_updatemeta: negative bytes
Stopped in lfs_cleanerd at cpu_Debugger+0x4: ret zero,(ra)
db>
db> ps
PID PPID PGRP UID S FLAGS COMMAND WAIT
7578 222 7578 0 3 0x4186 top select
7412 27886 7412 16073 3 0x4186 systat ttyin
27886 27866 27886 16073 3 0x4086 csh pause
27866 27817 27817 16073 3 0x4184 xterm select
27817 27769 27817 16073 3 0x4084 csh pause
27769 212 212 0 3 0x84 sshd1 select
>How-To-Repeat:
Stress the LFS filesystem. The panic detailed above occurred shortly
after a bonnie run had finished.
>Fix:
>Audit-Trail:
>Unformatted:
>14689 14688 14688 0 2 0x4 lfs_cleanerd
14688 1 14688 0 3 0x84 lfs_cleanerd wait
222 221 222 0 3 0x5086 bash wait
221 220 221 16073 3 0x4086 bash wait
220 217 217 16073 3 0x4184 xterm select
217 215 217 16073 3 0x4084 csh pause
215 212 212 0 3 0x84 sshd1 select
214 1 214 0 3 0x4086 csh ttyin
212 1 212 0 3 0x84 sshd1 select
200 1 200 0 3 0x84 inetd select
197 1 197 0 3 0x84 xntpd pause
195 1 195 0 3 0x184 cron nanosle
163 1 163 0 3 0x84 mount_mfs mfsidl
157 1 157 0 3 0x84 portmap select
150 1 150 0 2 0x84 syslogd
4 0 0 0 3 0x20204 ioflush syncer
3 0 0 0 3 0x20204 reaper reaper
2 0 0 0 3 0x20204 pagedaemon daemon_
1 0 1 0 3 0x4084 init wait
0 -1 0 0 3 0x20204 swapper schedul
db>
db> trace
cpu_Debugger() at cpu_Debugger+0x4
panic() at panic+0xe4
lfs_updatemeta() at lfs_updatemeta+0x434
lfs_gather() at lfs_gather+0x1c8
lfs_writefile() at lfs_writefile+0x1bc
lfs_writevnodes() at lfs_writevnodes+0x160
lfs_segwrite() at lfs_segwrite+0x140
sys_lfs_markv() at sys_lfs_markv+0x8bc
syscall() at syscall+0x1c8
XentSys() at XentSys+0x50
--- syscall (185, netbsd.sys_lfs_markv) ---
--- user mode ---
db>
(gdb) xps
proc pid flag st wchan comm
0xfffffc0004952d98 7578 4186 3 0xfffffc00005b2b60 top (select)
0xfffffc00049521f8 7412 4186 3 0xfffffc0000e18418 systat (ttyin)
0xfffffc00071809c0 27886 4086 3 0xfffffc00063a6018 csh (pause)
0xfffffc00071805e0 27866 4184 3 0xfffffc00005b2b60 xterm (select)
0xfffffc0007180200 27817 4084 3 0xfffffc00068fb630 csh (pause)
0xfffffc00049527c8 27769 84 3 0xfffffc00005b2b60 sshd1 (select)
0xfffffc00049523e8 14689 4 2 0 lfs_cleanerd (biowait)
0xfffffc0004952ba8 14688 84 3 0xfffffc0004952ba8 lfs_cleanerd (wait)
0xfffffc0004952008 222 5086 3 0xfffffc0004952008 bash (wait)
0xfffffc0000e3bd10 221 4086 3 0xfffffc0000e3bd10 bash (wait)
0xfffffc0000e3b930 220 4184 3 0xfffffc00005b2b60 xterm (select)
0xfffffc0000e3b740 217 4084 3 0xfffffc0003cba8d8 csh (pause)
0xfffffc0000e3af80 215 84 3 0xfffffc00005b2b60 sshd1 (select)
0xfffffc0000e3a7c0 214 4086 3 0xfffffc0000e18010 csh (ttyin)
0xfffffc0000e3bb20 212 84 3 0xfffffc00005b2b60 sshd1 (select)
0xfffffc0000e3b550 200 84 3 0xfffffc00005b2b60 inetd (select)
0xfffffc0000e3b360 197 84 3 0xfffffc0003cba008 xntpd (pause)
0xfffffc0000e3ad90 195 184 3 0xfffffc000058a8c4 cron (nanosleep)
0xfffffc0000e3b170 163 84 3 0xfffffc0002e11df8 mount_mfs (mfsidl)
0xfffffc0000e3aba0 157 84 3 0xfffffc00005b2b60 portmap (select)
0xfffffc0000e3a9b0 150 84 2 0 syslogd (select)
0xfffffc0000e3a5d0 4 20204 3 0xfffffc00005b2094 ioflush (syncer)
0xfffffc0000e3a3e0 3 20204 3 0xfffffc00005b1c08 reaper (reaper)
0xfffffc0000e3a1f0 2 20204 3 0xfffffc00005ce0c8 pagedaemon (daemon_slp)
0xfffffc0000e3a000 1 4084 3 0xfffffc0000e3a000 init (wait)
0xfffffc00005aef88 0 20204 3 0xfffffc00005aef88 swapper (scheduler)
proc pid flag st wchan comm
# grep lfs /etc/fstab
/dev/ccd0a /spare lfs rw 1 2
# disklabel ccd0a
# /dev/rccd0a:
type: ccd
disk: ccd
label: default label
flags:
bytes/sector: 512
sectors/track: 2048
tracks/cylinder: 1
sectors/cylinder: 2048
cylinders: 12272
total sectors: 25133460
rpm: 5400
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # microseconds
track-to-track seek: 0 # microseconds
drivedata: 0
8 partitions:
# size offset fstype [fsize bsize cpg]
a: 25133056 0 4.4LFS 1024 8192 0 # (Cyl. 0 - 12271)
c: 25133460 0 unused 0 0 # (Cyl. 0 - 12272*)