Subject: kern/37189: Panic in lockdebug_lookup - uninitialized lock
To: None <kern-bug-people@netbsd.org, gnats-admin@netbsd.org,>
From: None <scotte@warped.com>
List: netbsd-bugs
Date: 10/23/2007 23:50:00
>Number: 37189
>Category: kern
>Synopsis: amd64/-current panic in lockdebug_lookup with "uninitialized lock"
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Oct 23 23:50:00 +0000 2007
>Originator: Scott Ellis
>Release: NetBSD 4.99.34
>Organization:
>Environment:
System: NetBSD intrepid 4.99.34 NetBSD 4.99.34 (INTREPID.NEWBOX.DEBUG) #4: Mon Oct 22 16:59:57 PDT 2007 scotte@intrepid:/nbu/source/netbsd/src/obj.amd64/nbu/source/netbsd/src/sys/arch/amd64/compile/INTREPID.NEWBOX.DEBUG amd64
Architecture: x86_64
Machine: amd64
>Description:
I can repeatably cause a system panic (or spontaneous reboot, or hard lockup
w/o the ability to break into DDB) on my amd64/-current system when uploading
large numbers of pictures to Gallery 1.6.
This has been occuring on two different systems (one UP on an Athlon64,
another MP on an E6600).
With a LOCKDEBUG-enabled kernel, the panic is:
panic: lockdebug_lookup: uninitialized lock (1, id=-559038737)
Stopped in pid 18709.1 (jpegtopnm) at netbsd:breakpoint+0x1: ret
db{0}> bt
breakpoint() at netbsd:breakpoint+0x1
panic() at netbsd:panic+0x1bd
lockdebug_lookup() at netbsd:lockdebug_lookup+0x48
lockdebug_wantlock() at netbsd:lockdebug_wantlock+0x3c
mutex_vector_enter() at netbsd:mutex_vector_enter+0x8b
fdfree() at netbsd:fdfree+0xc3
exit1() at netbsd:exit1+0x2ce
exit1() at netbsd:exit1
syscall_plain() at netbsd:syscall_plain+0x270
uvm_fault(0xffff80006b92d790, 0x0, 1) -> e
kernel: page fault trap, code=0
Faulted in DDB; continuing...
db{0}>
The process list is:
db{0}> ps
PID PPID PGRP UID S FLAGS LWPS COMMAND WAIT
1491 21620 291 1002 2 0x4000 1 pnmtojpeg pipe
3939 21620 291 1002 2 0x4000 1 pnmscale
>18709 21620 291 1002 3 0x4000 1 jpegtopnm
21620 468 291 1002 2 0x4000 1 sh wait
23735 9478 23735 100 2 0x4100 1 systat ttyin
2757 530 530 1007 2 0x4100 1 imap-login kqread
16850 530 530 101 2 0x4101 1 imap kqread
14623 530 530 100 2 0x4101 1 imap kqread
17373 530 530 1007 2 0x4100 1 imap-login kqread
809 27336 809 100 2 0x4100 1 screen-4.0.3 pause
27336 19627 27336 100 2 0x4000 1 zsh pause
19627 15364 15364 100 2 0x100 1 sshd select
15364 575 15364 0 2 0x4000 1 sshd netio
1960 530 530 1007 2 0x4100 1 imap-login kqread
28592 530 530 1007 2 0x4100 1 imap-login kqread
5325 530 530 100 2 0x4101 1 imap kqread
6197 530 530 100 2 0x4101 1 imap kqread
2127 530 530 1007 2 0x4100 1 imap-login kqread
4880 1573 1573 1006 2 0x100 1 perl select
25852 1573 1573 1006 2 0x100 1 perl select
1573 1 1573 0 2 0 1 perl select
24688 530 530 1007 2 0x4100 1 imap-login kqread
4268 21944 4268 0 2 0x4000 1 zsh ttyin
21944 6679 21944 0 2 0x4000 1 csh pause
10694 6679 10694 100 2 0x4000 1 zsh ttyin
7128 6679 7128 100 2 0x4000 1 zsh ttyin
6924 9208 6924 0 2 0x4000 1 zsh ttyin
9208 6679 9208 0 2 0x4000 1 csh pause
9478 6679 9478 100 2 0x4000 1 zsh pause
6679 1 6679 100 2 0x100 1 screen-4.0.3 select
8851 530 530 1007 2 0x4100 1 imap-login kqread
697 1 697 0 2 0 1 selcd nanoslp
669 1 669 0 2 0x4000 1 getty ttyin
316 1 316 0 2 0 1 cron nanoslp
690 1 690 0 2 0 1 inetd kqread
575 1 575 0 2 0 1 sshd select
689 1 689 0 2 0 1 powerd kqread
270 1 270 15 2 0x100 1 ntpd pause
98 96 98 0 2 0 1 lpd nanoslp
96 1 96 0 2 0 1 lpd select
573 530 530 0 2 0x4000 1 dovecot-auth kqread
530 1 530 0 2 0 1 dovecot kqread
489 1 489 0 2 0x1 2 clamd *
473 486 486 0 2 0x101 1 smbd pause
490 1 490 0 2 0x1 1 nmbd select
486 1 486 0 2 0x101 1 smbd select
479 292 2 0 2 0x4000 1 logger pipe
464 292 2 0 2 0x4000 1 sed pipe
492 292 2 1008 2 0x4100 2 mysqld *
478 291 291 1002 2 0x101 28 httpd *
468 291 291 1002 2 0x101 28 httpd *
469 291 291 1002 2 0x100 1 httpd netcon
292 1 2 0 2 0x4000 1 sh wait
291 1 291 0 2 0x1 1 httpd select
280 1 280 1005 2 0x100 1 exim-4.68-2 select
263 1 263 0 2 0x1 1 saslauthd netcon
247 1 247 0 2 0 1 dhcpd select
156 1 156 0 2 0 1 rpcbind select
141 1 141 14 2 0x100 5 named *
143 136 136 18 2 0x100 1 pflogd bpf
136 1 136 0 2 0 1 pflogd netio
107 1 107 0 2 0 1 syslogd kqread
86 1 86 0 2 0 1 dhclient select
1 0 1 0 2 0x4001 1 init wait
0 -1 0 0 2 0x20002 29 system *
db{0}>
>How-To-Repeat:
Install Gallery 1.x, and upload a few hundred megs of pictures. :-)
>Fix:
Not known. I'm more than willing to debug further, if somebody tells me
what I should do and provide.
>Unformatted: