PROBLEM: Kernel 2.4.20 crashes when a second isdn channel is opened by ibod

Hello,

I guess we have detected a kernel bug in the isdn subsystem ( isdn_ppp.c ). I have enclosed the bug report in this mail in the format that is asked by the file "REPORTING-BUGS" in the kernel source directory.
If you need further assistance please mail to: [email protected]

Regards,

Arno Wilhelm

[1.] One line summary of the problem:

Kernel 2.4.20 crashes when a second isdn channel is opened by ibod (isdn bandwith daemon).

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

After having connected to our internet provider via isdn, the kernel crashes whenever the ibod daemons succeeds in opening a second isdn channel. The last human readable messages are:

ippp0: all channels busy - requeuing!
Scheduling in iterrrupt
kernel BUG at sched.c; 564!
invalid operand: 0000

We have compiled a fresh unpatched kernel version 2.4.20 from www.kernel.org in order to trace down the bug.

I have to say at this point that probably our internet provider does *not* support channel bundling. So I guess that the second channel get's a new connection. But I think that should be a reason for the kernel to crash ? We can reproduce this problem very easily by:
- Starting ipppd and connecting to the provider
- Flood pinging the point to point partner so that ibod opens the second channel.

I will enclose in this mail the full oops message, /var/log/messages, and a patch thar worked for us.

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

kernel 2.4.20, all channels busy - requeuing!, kernel BUG at sched.c; 564!, isdn, ibod, second channel, isdn4k-utils 3.2p1,

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

cat /proc/version
Linux version 2.4.20 (root@vir) (gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-85)) #4 Thu Apr 10 14:41:07 CEST 2003

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

ippp0: all channels busy - requeuing!
Scheduling in iterrrupt
kernel BUG at sched.c; 564!
invalid operand: 0000

CPU: 0
EIP: 0010:[<c0113cb3>] Not tainted
EFLAGS: 00010292
eax: 00000018 ebx: c0106df0 ecx: c5a48000 edx: 00000001
esi: c027c000 edi: c027c000 ebp: c027dfdc esp: c027dfb8
ds: 0018 es: 0018 ss: 0018
Process swapper (pid: 0, stackpage=c027d000)

Stack: c020e2be c027c000 c027c000 00000000 cfd90018 c0100018 c0106df0 c027c000
       c027c000 c0106df0 c0106e9e 00000001 00098800 c0105000 0008e000 c027e708
Call Trace:    [<c0106df0>] [<c0106df0>] [<c0106e9e>] [<c0105000>]

Code: 0f 0b 34 02 b6 e2 20 c0 58 8b 45 e8 c1 e0 05 05 00 6b 29 c0
 <0>Kernel panic: Aiee, killing interrupt handler!

In interrupt handler - not syncing
<0>Rebooting in 120 seconds..

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

Use redhat isdn setup.

[7.] Environment

Not important !

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

If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes.

Linux virusnix 2.4.20 #4 Thu Apr 10 14:41:07 CEST 2003 i686 unknown

Gnu C                  2.96
Gnu make               3.78.1
binutils               2.9.5.0.22
util-linux             2.10f
mount                  2.10f
modutils               2.3.21
e2fsprogs              1.18
reiserfsprogs          3.x.0k-pre7
PPP                    2.4.1
isdn4k-utils           3.2p1
Linux C Library        2.1.3
Dynamic linker (ldd)   2.1.3
Procps                 2.0.6
Net-tools              1.54
Console-tools          0.3.3
Sh-utils               2.0
Modules Loaded         hisax_fcpcipnp hisax_isac hisax isdn slhc e100

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

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Celeron (Coppermine)
stepping : 10
cpu MHz : 951.689
cache size : 128 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips : 1900.54

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

hisax_fcpcipnp          7600   0 (unused)
hisax_isac              8400   0 [hisax_fcpcipnp]
hisax                 511440   0 [hisax_fcpcipnp hisax_isac]
isdn                  114256   0 [hisax]
slhc                    4656   0 [isdn]
e100                   52272   1

[7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)

0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0376-0376 : ide1
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
5000-500f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] d000-d00f : VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE
d000-d007 : ide0
d008-d00f : ide1
d400-d41f : VIA Technologies, Inc. USB
d800-d81f : VIA Technologies, Inc. USB (#2)
dc00-dc1f : AVM Audiovisuelles MKTG & Computer System GmbH Fritz!PCI v2.0 ISDN
dc00-dc1f : fcpcipnp
e000-e0ff : PCI device 1050:6692 (Winbond Electronics Corp) e400-e43f : Intel Corp. 82557/8/9 [Ethernet Pro 100]
e400-e43f : e100
e800-e83f : Intel Corp. 82557/8/9 [Ethernet Pro 100] (#2)
e800-e83f : e100

00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-0ffeffff : System RAM
00100000-00208a6e : Kernel code
00208a6f-002778c3 : Kernel data
0fff0000-0fff2fff : ACPI Non-volatile Storage
0fff3000-0fffffff : ACPI Tables
d0000000-d7ffffff : S3 Inc. Savage 4
d8000000-dbffffff : VIA Technologies, Inc. VT82C693A/694x [Apollo PRO133x] dd000000-dd07ffff : S3 Inc. Savage 4
dd080000-dd09ffff : Intel Corp. 82557/8/9 [Ethernet Pro 100]
dd080000-dd09ffff : e100
dd0a0000-dd0bffff : Intel Corp. 82557/8/9 [Ethernet Pro 100] (#2)
dd0a0000-dd0bffff : e100
dd0c0000-dd0c0fff : Intel Corp. 82557/8/9 [Ethernet Pro 100] (#2)
dd0c0000-dd0c0fff : e100
dd0c1000-dd0c1fff : Intel Corp. 82557/8/9 [Ethernet Pro 100]
dd0c1000-dd0c1fff : e100
dd0c2000-dd0c201f : AVM Audiovisuelles MKTG & Computer System GmbH Fritz!PCI v2.0 ISDN dd0c3000-dd0c3fff : PCI device 1050:6692 (Winbond Electronics Corp) fec00000-fec00fff : reserved
fee00000-fee00fff : reserved
ffff0000-ffffffff : reserved

[7.5.] PCI information ('lspci -vvv' as root)

00:00.0 Host bridge: VIA Technologies, Inc. VT82C693A/694x [Apollo PRO133x] (rev c4)
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 8 set
Region 0: Memory at d8000000 (32-bit, prefetchable) [size=64M]
Capabilities: [a0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
Capabilities: [c0] Power Management version 2
Flags: PMEClk- AuxPwr- DSI- D1- D2- PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo MVP3/Pro133x AGP] (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 0 set
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000f000-00000fff
Memory behind bridge: fff00000-000fffff
Prefetchable memory behind bridge: fff00000-000fffff
BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
Capabilities: [80] Power Management version 2
Flags: PMEClk- AuxPwr- DSI- D1+ D2- PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40)
Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0 set
Capabilities: [c0] Power Management version 2
Flags: PMEClk- AuxPwr- DSI- D1- D2- PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.1 IDE interface: VIA Technologies, Inc. VT82C586/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
Subsystem: VIA Technologies, Inc.
VT82C586/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 set
Region 4: I/O ports at d000 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- AuxPwr- DSI- D1- D2- PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.2 USB Controller: VIA Technologies, Inc. USB (rev 16) (prog-if 00 [UHCI])
Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 set, cache line size 08
Interrupt: pin D routed to IRQ 10
Region 4: I/O ports at d400 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- AuxPwr- DSI- D1- D2- PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.3 USB Controller: VIA Technologies, Inc. USB (rev 16) (prog-if 00 [UHCI])
Subsystem: VIA Technologies, Inc. (Wrong ID) USB Controller
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 set, cache line size 08
Interrupt: pin D routed to IRQ 10
Region 4: I/O ports at d800 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- AuxPwr- DSI- D1- D2- PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin ? routed to IRQ 11
Capabilities: [68] Power Management version 2
Flags: PMEClk- AuxPwr- DSI- D1- D2- PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:09.0 Network controller: AVM Audiovisuelles MKTG & Computer System GmbH Fritz!PCI v2.0 ISDN (rev 02)
Subsystem: AVM Audiovisuelles MKTG & Computer System GmbH: Unknown
device 0e00
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin A routed to IRQ 5
Region 0: Memory at dd0c2000 (32-bit, non-prefetchable) [size=32]
Region 1: I/O ports at dc00 [size=32]
Capabilities: [40] Power Management version 2
Flags: PMEClk- AuxPwr- DSI- D1- D2+ PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.0 Network controller: Winbond Electronics Corp W6692 (rev 01)
Subsystem: Technical Corp.: Unknown device 5678
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-

        Interrupt: pin A routed to IRQ 7
        Region 0: Memory at dd0c3000 (32-bit, non-prefetchable) [size=4K]
        Region 1: I/O ports at e000 [size=256]

00:0d.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0c)
Subsystem: IBM 10/100 Ethernet Server Adapter
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 8 min, 56 max, 32 set, cache line size 08
Interrupt: pin A routed to IRQ 11
Region 0: Memory at dd0c1000 (32-bit, non-prefetchable) [size=4K] Region 1: I/O ports at e400 [size=64]
Region 2: Memory at dd080000 (32-bit, non-prefetchable) [size=128K] Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- AuxPwr- DSI+ D1+ D2+ PME+
Status: D0 PME-Enable- DSel=0 DScale=2 PME-

00:0e.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0c)
Subsystem: IBM 10/100 Ethernet Server Adapter
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 8 min, 56 max, 32 set, cache line size 08
Interrupt: pin A routed to IRQ 10
Region 0: Memory at dd0c0000 (32-bit, non-prefetchable) [size=4K] Region 1: I/O ports at e800 [size=64]
Region 2: Memory at dd0a0000 (32-bit, non-prefetchable) [size=128K] Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- AuxPwr- DSI+ D1+ D2+ PME+
Status: D0 PME-Enable- DSel=0 DScale=2 PME-

00:0f.0 VGA compatible controller: S3 Inc. Savage 4 (rev 06) (prog-if 00 [VGA])
Subsystem: IBM: Unknown device 01c5
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 4 min, 255 max, 248 set, cache line size 08
Interrupt: pin A routed to IRQ 5
Region 0: Memory at dd000000 (32-bit, non-prefetchable) [size=512K] Region 1: Memory at d0000000 (32-bit, prefetchable) [size=128M] Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- AuxPwr- DSI+ D1+ D2+ PME-
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

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

No SCSI !

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

[7.8] Other notes, patches, fixes, workarounds:

Patch that worked around the kernel crash:

----------------------------- snip -----------------------------------

@@ -1174,9 +1174,10 @@
 
    lp = isdn_net_get_locked_lp(nd);
    if (!lp) {
-       printk(KERN_WARNING "%s: all channels busy - requeuing!\n", netdev->name);
+       printk(KERN_WARNING "isdn_ppp.c:1177: %s: all channels busy - requeuing!\n", netdev->name);
        retval = 1;
-       goto unlock;
+       //goto unlock;
+       goto out;
    }
    /* we have our lp locked from now on */
 

----------------------------- snip -----------------------------------

7.9 Logfile

Apr  9 19:14:06 virusnix kernel: CSLIP: code copyright 1989 Regents of the University of California
Apr  9 19:14:06 virusnix kernel: ISDN subsystem Rev: 1.1.4.1/1.1.4.1/1.1.4.1/1.1.4.1/1.1.4.1/1.1.4.1 loaded

Apr  9 19:14:06 virusnix kernel: HiSax: Linux Driver for passive ISDN cards
Apr  9 19:14:06 virusnix kernel: HiSax: Version 3.5 (module)
Apr  9 19:14:06 virusnix kernel: HiSax: Layer1 Revision 1.1.4.1
Apr  9 19:14:06 virusnix kernel: HiSax: Layer2 Revision 1.1.4.1
Apr  9 19:14:06 virusnix kernel: HiSax: TeiMgr Revision 1.1.4.1
Apr  9 19:14:06 virusnix kernel: HiSax: Layer3 Revision 1.1.4.1
Apr  9 19:14:06 virusnix kernel: HiSax: LinkLayer Revision 1.1.4.1
Apr  9 19:14:06 virusnix kernel: HiSax: Approval certification valid
Apr  9 19:14:06 virusnix kernel: HiSax: Approved with ELSA Microlink PCI cards
Apr  9 19:14:06 virusnix kernel: HiSax: Approved with Eicon Technology Diva 2.01 PCI cards
Apr  9 19:14:06 virusnix kernel: HiSax: Approved with Sedlbauer Speedfax + cards
Apr  9 19:14:06 virusnix kernel: HiSax: Approved with HFC-S PCI A based cards
Apr  9 19:14:06 virusnix kernel: hisax_isac: ISAC-S/ISAC-SX ISDN driver v0.1.0
Apr  9 19:14:06 virusnix kernel: hisax_fcpcipnp: Fritz!Card PCI/PCIv2/PnP ISDN driver v0.0.1
Apr  9 19:14:06 virusnix kernel: HiSax: Card 1 Protocol EDSS1 Id=fcpcipnp0 (0)
Apr  9 19:14:06 virusnix kernel: HiSax: DSS1 Rev. 1.1.4.1
Apr  9 19:14:06 virusnix kernel: HiSax: 2 channels added
Apr  9 19:14:06 virusnix kernel: HiSax: MAX_WAITING_CALLS added
Apr  9 19:14:06 virusnix kernel: PCI: Found IRQ 5 for device 00:09.0
Apr  9 19:14:06 virusnix kernel: PCI: Sharing IRQ 5 with 00:0f.0
Apr  9 19:14:06 virusnix kernel: hisax_fcpcipnp: found adapter Fritz!Card PCI v2 at 00:09.0
Apr  9 19:14:08 virusnix ipppd[5029]: Found 2 devices: ,
Apr  9 19:14:08 virusnix ipppd[5030]: ipppd i2.2.12 (isdn4linux version of pppd by MH) started
Apr  9 19:14:08 virusnix ipppd[5030]: init_unit: 0
Apr  9 19:14:08 virusnix ipppd[5030]: Connect[0]: /dev/ippp0, fd: 7
Apr  9 19:14:08 virusnix ipppd[5030]: init_unit: 1
Apr  9 19:14:08 virusnix ipppd[5030]: Connect[1]: /dev/ippp1, fd: 8
Apr  9 19:14:18 virusnix ibod[5032]: Parameter FILTER reconfigured to 10
Apr  9 19:14:18 virusnix kernel: ippp0: dialing 1 00718918898...
Apr  9 19:14:21 virusnix kernel: isdn_net: ippp0 connected
Apr  9 19:14:21 virusnix ipppd[5030]: Local number: , Remote number: 00718918898, Type: outgoing
Apr  9 19:14:21 virusnix ipppd[5030]: PHASE_WAIT -> PHASE_ESTABLISHED, ifunit: 0, linkunit: 0, fd: 7
Apr  9 19:14:21 virusnix ipppd[5030]: Remote message:
Apr  9 19:14:21 virusnix ipppd[5030]: MPPP negotiation, He: No We: No
Apr  9 19:14:21 virusnix ipppd[5030]: CCP enabled! Trying CCP.
Apr  9 19:14:21 virusnix ipppd[5030]: CCP: got ccp-unit 0 for link 0 (Compression Control Protocol)
Apr  9 19:14:21 virusnix ipppd[5030]: ccp_resetci!
Apr  9 19:14:21 virusnix ipppd[5030]: local  IP address 212.68.32.62
Apr  9 19:14:21 virusnix ipppd[5030]: remote IP address 194.93.78.21
Apr  9 19:14:21 virusnix logger: Started device ippp0 with parameters ippp0 /dev/ippp0 0 212.68.32.62 194.93.78.21 ippp0
Apr  9 19:16:14 virusnix ibod[5032]: added new link
Apr  9 19:16:14 virusnix kernel: ippp1: dialing 1 00718918898...
Apr  9 19:16:23 virusnix kernel: isdn_net: local hangup ippp1
Apr  9 19:16:23 virusnix kernel: ippp1: Chargesum is 0
Apr  9 19:16:23 virusnix ibod[5032]: added new link
Apr  9 19:16:23 virusnix kernel: ippp1: dialing 1 00718918898...
Apr  9 19:16:32 virusnix kernel: isdn_net: local hangup ippp1
Apr  9 19:16:32 virusnix kernel: ippp1: Chargesum is 0
Apr  9 19:16:32 virusnix ibod[5032]: added new link
Apr  9 19:16:32 virusnix kernel: ippp1: dialing 1 00718918898...
Apr  9 19:16:34 virusnix kernel: isdn_net: ippp1 connected
Apr  9 19:16:34 virusnix ipppd[5030]: Local number: , Remote number: 00718918898, Type: outgoing
Apr  9 19:16:34 virusnix ipppd[5030]: PHASE_WAIT -> PHASE_ESTABLISHED, ifunit: 1, linkunit: 1, fd: 8

Apr  9 17:34:29 virusnix syslogd 1.3-3: restart

Mr Arno Wilhelm
phion Information Technologies GmbH
System Engineer
Eduard-Bodem-Gasse 1
A-6020 Innsbruck
www.phion.com
tel: +43 512 39 45 45
fax: +43 512 39 45 45 20

This bug is known and fixed by Patrick McHardy <[email protected]>. Please use patch attached and confirm it works. Thank you.

See Changelog

Regards,
Stephan

diff -Nru a/drivers/isdn/isdn_net.c b/drivers/isdn/isdn_net.c
--- a/drivers/isdn/isdn_net.c   Thu Mar 27 02:00:21 2003
+++ b/drivers/isdn/isdn_net.c   Thu Mar 27 02:00:21 2003
@@ -2831,6 +2831,7 @@
 
                        /* If binding is exclusive, try to grab the channel */
                        save_flags(flags);
+                       cli();
                        if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
                                lp->l2_proto, lp->l3_proto, drvidx,
                                chidx, lp->msn)) < 0) {
diff -Nru a/drivers/isdn/isdn_ppp.c b/drivers/isdn/isdn_ppp.c
--- a/drivers/isdn/isdn_ppp.c   Thu Mar 27 02:00:21 2003
+++ b/drivers/isdn/isdn_ppp.c   Thu Mar 27 02:00:21 2003
@@ -1176,7 +1176,7 @@
        if (!lp) {
                printk(KERN_WARNING "%s: all channels busy - requeuing!\n", netdev->name);
                retval = 1;
-               goto unlock;
+               goto out;
        }
        /* we have our lp locked from now on */

I have tried it out and it works for me. Thank you.

Regards,

Arno Wilhelm

Mr Arno Wilhelm
phion Information Technologies GmbH
System Engineer
Eduard-Bodem-Gasse 1
A-6020 Innsbruck
www.phion.com
tel: +43 512 39 45 45
fax: +43 512 39 45 45 20