Red Hat Bugzilla – Bug 90340
Kernel panics with ISDN channel bonding
Last modified: 2007-04-18 12:53:30 EDT
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Description of problem:
I use a RedHat 8.0 host as an ISDN Internet gateway. Previously I was using
RedHat 7.1 with some upgrades to 7.3 and vanilla kernel 2.4.20-pre10 without any
problems for 180 days of uptime (RedHat kernels had bugs in the ISDN subsystem
and they Ooops'ed all the time).
I thought, that most of the ISDN bugs fixed in 2.4.20 were back ported to
kernel-2.4.18-27.8.0, but some of them seem to be missing. After 30 days of
uptime I saw that pings over the double channel ISDN connection were getting
high, when the ISDN connection had been up for a few days, but after `isdnctrl
hangup ippp1 && isdnctrl hangup ippp0 && isdnctrl dial ippp0 && isdnctrl dial
ippp1` the pings were low again.
This ping problem may be in my ISDN network terminator or at my ISP, but the
kernel ISDN problem showed up when I was doing `isdnctrl hangup ippp1` since the
kernel Ooops'ed. And it should not ;) I did not get the Ooops details this time,
but perhaps the next one... unless I go to vanilla 2.4.20 or 2.4.21.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Use ISDN with two 64kbit B-channels as one ippp0 interface
2. hangup and dial them
Actual Results: Usually the ping drops, but once the kernel paniced.
Expected Results: Don't panic.
Module Size Used by Not tainted
hisax 451332 3
isdn 123168 3 [hisax]
slhc 6340 2 [isdn]
8139too 16104 1
mii 1932 0 [8139too]
ipv6 147188 -1
ipchains 37480 80
ext3 61408 2
jbd 46932 2 [ext3]
00:00.0 Host bridge: Intel Corp. 430VX - 82437VX TVX [Triton VX] (rev 02)
00:07.0 ISA bridge: Intel Corp. 82371SB PIIX3 ISA [Natoma/Triton II] (rev 01)
00:07.1 IDE interface: Intel Corp. 82371SB PIIX3 IDE [Natoma/Triton II]
00:08.0 VGA compatible controller: Unknown device 5233:8a01 (rev 01)
00:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
00:0b.0 Network controller: Winbond Electronics Corp: Unknown device 6692 (rev ff)
Last /var/log/messages before Oops (ISDN sees different time than other
subsystems, perhaps kernel clock != bios clock after Oops):
May 6 22:47:50 nalle kernel: isdn_net: local hangup ippp1
May 6 22:47:50 nalle kernel: ippp1: Chargesum is 0
May 6 22:47:50 nalle ipppd: Modem hangup
May 6 22:47:50 nalle ipppd: Connection terminated.
May 6 22:47:50 nalle ipppd: taking down PHASE_DEAD link 1, linkunit: 1
May 6 22:43:29 nalle syslogd 1.4.1: restart.
May 6 22:43:29 nalle touko 6 22:43:29 syslog: syslogd startup succeeded
May 6 22:43:30 nalle touko 6 22:43:29 syslog: klogd startup succeeded
May 6 22:43:29 nalle kernel: klogd 1.4.1, log source = /proc/kmsg started.
May 6 22:43:29 nalle kernel: Linux version 2.4.18-27.8.0 (firstname.lastname@example.org
evel.redhat.com) (gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)) #1 Fri Mar
14 08:42:52 EST 2003
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem
The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases,
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/