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Subject[BUG REPORT]: lock-up when doing networking stuff
[1.] One line summary of the problem:

solid hang when editing a couple of scripts, after browsing the net

[2.] Full description of the problem/report:

my pc locked up solid a couple of minutes ago. mouse stopped working, the
keyboard didn't work any more, no network access.
SysRQ also didn't work - the last time I had a lock up, this worked...
I suspect that this problem comes from the isdn modules. The hangs always
occured slightly before a connection was established or slightly after it
was dropped. Also (not related to this, I think), once I forgot compiling
in DSS1, ie. there was no protocol selected, and immediately after a
connection was established the pc froze. However, as I just said, that
seems to be a different problem.
Anyway,

[3.] Keywords (i.e., modules, networking, kernel):

networking, isdn, 3dfx framebuffer (??)

[4.] Kernel version (from /proc/version):

Linux version 2.3.24 (root@mahatma) (gcc version 2.95.2 19991024
(release)) #5 Tue Nov 2 17:14:25 MET 1999

[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)

n/a, unfortunately

[6.] A small shell script or example program which triggers the
problem (if possible)

I haven't found a way to trigger the lock up yet.

[7.] Environment
[7.1.] Software (add the output of the ver_linux script here)

-- Versions installed: (if some fields are empty or look
-- unusual then possibly you have very old versions)
Linux mahatma 2.3.24 #5 Tue Nov 2 17:14:25 MET 1999 i586 unknown
Kernel modules 2.2.2-pre6
Gnu C 2.95.2
Binutils 2.9.1.0.25
Linux C Library x 1 root root 4190668 Jul 22 23:29
/lib/libc.so.6
Dynamic linker ldd (GNU libc) 2.1.1
Procps 1.2.11
Mount 2.9y
Net-tools 1.52
Kbd 0.99
Sh-utils 1.16
Modules Loaded ipt_unclean ipt_udp ipt_tcp ipt_mac ipt_icmp
ipt_REJECT ipt_LOG netfilter_dev iptables ip_nat_map_static
ip_nat_map_redirect ip_nat_map_masquerade ip_nat_ftp ip_nat ip_defrag
ip_conntrack_ftp ip_conntrack hisax isdn

[7.2.] Processor information (from /proc/cpuinfo):

root@mahatma:/usr/src/linux/scripts # cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 8
model name : AMD-K6(tm) 3D processor
stepping : 12
cpu MHz : 400.926394
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 sep mtrr pge mmx 3dnow
bogomips : 799.54

(note: the cpu is overclocked from 350 Mhz to 400 Mhz. However, the
temperature is only about 40°C when it's running at 100% CPU-usage)

[7.3.] Module information (from /proc/modules):

ipt_unclean 6848 0 (unused)
ipt_udp 604 0 (unused)
ipt_tcp 892 0 (unused)
ipt_mac 604 0 (unused)
ipt_icmp 576 0 (unused)
ipt_REJECT 512 0 (unused)
ipt_LOG 2620 0 (unused)
netfilter_dev 4452 0 (unused)
iptables 6600 7 [ipt_unclean ipt_udp ipt_tcp ipt_mac
ipt_icmp ipt_REJECT ipt_LOG]
ip_nat_map_static 616 0 (unused)
ip_nat_map_redirect 712 0 (unused)
ip_nat_map_masquerade 1180 1
ip_nat_ftp 2548 0 (unused)
ip_nat 15224 4 [ip_nat_map_static ip_nat_map_redirect
ip_nat_map_masquerade ip_nat_ftp]
ip_defrag 580 0 (unused)
ip_conntrack_ftp 1696 1 [ip_nat_ftp]
ip_conntrack 10720 2 [ip_nat_map_masquerade ip_nat_ftp ip_nat
ip_conntrack_ftp]
hisax 142416 3
isdn 101952 4 [hisax]

[7.4.] SCSI information (from /proc/scsi/scsi)

n/a

[7.5.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):

output of /proc/interrupts:

CPU0
0: 173491 XT-PIC timer
1: 9865 XT-PIC keyboard
2: 0 XT-PIC cascade
8: 2 XT-PIC rtc
9: 924 XT-PIC acpi, HiSax, eth0
12: 7950 XT-PIC PS/2 Mouse
13: 1 XT-PIC fpu
14: 126534 XT-PIC ide0
15: 6 XT-PIC ide1
NMI: 0
ERR: 0

cat /proc/pci

PCI devices found:
Bus 0, device 0, function 0:
Host bridge: Acer Labs M1541 Aladdin V (rev 4).
Master Capable. Latency=64.
Non-prefetchable 32 bit memory at 0xe0000000 [0xe3ffffff].
Bus 0, device 1, function 0:
PCI bridge: Acer Labs M5243 AGP (rev 4).
Master Capable. Latency=64. Min Gnt=8.
Bus 0, device 3, function 0:
Bridge: Acer Labs M7101 PMU (rev 0).
Bus 0, device 7, function 0:
ISA bridge: Acer Labs M1533 Aladdin IV (rev 195).
Bus 0, device 10, function 0:
Ethernet controller: Realtek 8029 (rev 0).
IRQ 9.
I/O at 0xb800 [0xb81f].
Bus 0, device 11, function 0:
Network controller: PCI device 1048:1000 (rev 1).
IRQ 9.
Non-prefetchable 32 bit memory at 0xdd000000 [0xdd00007f].
I/O at 0xb400 [0xb47f].
I/O at 0xb000 [0xb003].
Bus 0, device 15, function 0:
IDE interface: Acer Labs M5229 TXpro (rev 193).
Master Capable. Latency=32. Min Gnt=2.Max Lat=4.
I/O at 0xa800 [0xa80f].
Bus 1, device 0, function 0:
VGA compatible controller: 3Dfx Voodoo3 (rev 1).
IRQ 11.
Non-prefetchable 32 bit memory at 0xde000000 [0xdfffffff].
Prefetchable 32 bit memory at 0xe6000000 [0xe7ffffff].
I/O at 0xd800 [0xd8ff].
my isdn card (Elsa Quickstep 1000 PCI) and the pci ne2000 clone share
IRQ9.

last /var/log/messages entries:

Nov 7 00:35:07 mahatma ipppd[86]: Modem hangup
Nov 7 00:35:07 mahatma ipppd[86]: Connection terminated.
Nov 7 00:35:07 mahatma ipppd[86]: taking down PHASE_DEAD link 0,
linkunit: 0
Nov 7 00:35:07 mahatma ipppd[86]: closing fd 7 from unit 0
Nov 7 00:35:07 mahatma ipppd[86]: link 0 closed , linkunit: 0
Nov 7 00:35:07 mahatma ipppd[86]: reinit_unit: 0
Nov 7 00:35:07 mahatma ipppd[86]: Connect[0]: /dev/ippp0, fd: 7
Nov 7 00:35:07 mahatma kernel: isdn_net: local hangup ippp0
Nov 7 00:35:07 mahatma kernel: ippp0: Chargesum is 0
Nov 7 00:35:07 mahatma kernel: ippp, open, slot: 0, minor: 0, state: 0000
Nov 7 00:35:07 mahatma kernel: ippp_ccp: allocating reset data structure
Nov 7 00:35:07 mahatma isdnlog: Nov 07 00:35:07 tei 90 calling Eins und
Eins with +49-XXXX-XXXXXX
Nov 7 00:35:08 mahatma isdnlog: Nov 07 00:35:08 tei 90 calling
Eins und Eins with +49-XXXX-XXXXXX
Nov 7 00:35:23 mahatma lpd[897]: galileo.jonas-jochum.de
Nov 7 00:35:23 mahatma lpd[897]: unknown printer lp0
this kinda makes me think, that isdn is the cause. (those lpd messages are
all over the place - I was too lazy to delete the entry from the remote
queue - so they are irrelevant)

I tried to use SysRQ-p,t and m but those didn't work.

When this lock-up happened, the following programs were running:
X, Netscape, xmms, bladeenc (mp3-encoder), 2x vi, apache, sendmail, mysql,
pine, slapd, gpm...those are the ones I remember.
I was working at the console on a php4-script and a couple of templates.

=============
If there's anything else you need, I'll mail it. I'll do whatever you want
me to do.
I would be happy to track that bug down (if you can tell me how to :),
since it already bit me thrice.

Reg.,
Jonas Jochum

--
http://www.jonas-jochum.de | email@jonas-jochum.de
I'm signature virus '99. Copy me into your ~/.signature to help me spread.


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