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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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