Red Hat Bugzilla – Bug 309101
kudzu segfaults on an irregular basis
Last modified: 2014-03-16 23:08:41 EDT
On a Gateway laptop, a kudzu segfault error that happened several times in
succession earlier today, but I can't seem to reproduce now. From
Sep 27 08:09:15 localhost kernel: EXT3 FS on sda1, internal journal
Sep 27 08:09:15 localhost kernel: EXT3-fs: mounted filesystem with ordered data
Sep 27 08:09:15 localhost kernel: ACPI: PCI Interrupt 0000:00:02.0[A] -> GSI 16
(level, low) -> IRQ 17
Sep 27 08:09:15 localhost kernel: Adding 1048568k swap on /dev/mapper/f8-swap.
Priority:-1 extents:1 across:1048568k
Sep 27 08:09:15 localhost kernel: kudzu: segfault at 00000000 eip 4c47d617
esp bf9e2458 error 4
Sep 27 08:09:15 localhost kernel: ADDRCONF(NETDEV_UP): eth0: link is not ready
Sep 27 08:09:15 localhost kernel: e100: eth0: e100_watchdog: link up, 100Mbps,
Sep 27 08:09:15 localhost kernel: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
$ uname -r
Which kudzu version?
Whoops, my mistake for not providing that:
$ rpm -q kudzu
kudzu is segfaulting on me too. I get the following when I try to run
[root@localhost ~]# /etc/init.d/kudzu start
Checking for hardware changes/etc/init.d/kudzu: line 23: 3094 Segmentation
fault /sbin/kudzu $KUDZU_ARGS
And the following gets logged in /var/log/messages:
Nov 11 18:26:22 localhost kudzu: obsolete kudzu ddcProbe called
Nov 11 18:26:22 localhost kernel: kudzu: segfault at 00000000 eip 001b8bc8
esp bfc728dc error 4
I don't know if this is the same problem reported in this bug but it looks
similar. It happens in the final version of Fedora 8 plus latest updates. The
funny thing is that I installed it on my Desktop (AMD Athlon 2000+) and it works
fine there. It fails only on my laptop (Dell XPS M1210 Intel Core Duo).
My packages are:
Maybe we should update the version and severity of this bug report. I guess
this particular problem is keeping my sound card from working correctly on my
laptop. So far I get no sound on my shiny new system.
William - this has nothing to do with any sound problems you have - please file
If you do 'strace /usr/sbin/kudzu', what's the output (and does it crash?)?
Created attachment 255671 [details]
Output of strace -tt /sbin/kudzu as root
This is the output you asked. If you need me to, I can install debuginfo
packages and try to get an stack trace, just tell me what other debuginfo
packages do I need besides kudzu.
kudzu-debuginfo should almost certainly be enough, but if you want the full
stack, 'debuginfo-install kudzu' should DTRT.
The most incredible thing just happened: For some reason kudzu doesn't fail
anymore. It apparently fixed it self when I installed the debuginfo packages
but now that I removed all of them it still works fine. I remember I tried a
gdb execution before the debuginfo packages but I only got a very lame backtrace.
It works fine in both: the boot process and directly from the console as root.
Now when I execute /etc/init.d/kudzu start the only thing that gets logged in
messages is: localhost kudzu: obsolete kudzu ddcProbe called
The funny thing is that it _always_ failed on me after installation. Is there
anything wrong that you can see on the attached strace output in comment #5 ??
I'll keep an eye on it and see if it fails again.
No particular reason it would start succeeding, no; at least ,not unless your
hardware information changed at the same time.
Created attachment 290504 [details]
My crashing kudzu strace
kudzu-18.104.22.168-1 (Fedora 8)
Checking for hardware changes/etc/init.d/kudzu: line 23: 3261 Segmentation
fault /sbin/kudzu $KUDZU_ARGS
[rngadam@localhost ~]$ dmesg | grep kudzu
kudzu: segfault at 00000000 eip 00180bc8 esp bfcefd2c error 4
kudzu: segfault at 00000000 eip 00180bc8 esp bfcc90fc error 4
as per comment #3 idea rejected by Bill that sound not working is not related to
kudzu... If kudzu crash before completion, wouldn't the setup for sound not
I also tried gdb after installing with `yum install kudzu-debuginfo`:
(gdb) file /sbin/kudzu
Reading symbols from /sbin/kudzu...warning: the debug information found in
"/usr/lib/debug//sbin/kudzu.debug" does not match "/sbin/kudzu" (CRC mismatch).
even if I seem to have the correct package installed:
[rngadam@localhost ~]$ rpm -q kudzu-debuginfo
[rngadam@localhost ~]$ rpm -q kudzu
when I went ahead and used `debuginfo-install kudzu`, it also sets
kudzu-debuginfo to be updated once again and I'm able to get this stacktrace:
Starting program: /sbin/kudzu
Program received signal SIGSEGV, Segmentation fault.
0x00180bc8 in strcmp () from /lib/libc.so.6
#0 0x00180bc8 in strcmp () from /lib/libc.so.6
#1 0x0805113b in isAliased (cf=0x9d519b0, alias=0x8061351 "snd-card-",
module=0x0) at modules.c:339
#2 0x0804b353 in isConfigured (dev=0x9d5fb60) at hwconf.c:472
#3 0x0804c500 in configMenu (oldDevs=0x0, newDevs=0x9d60818, runFirst=1)
#4 0x0804cce0 in main (argc=Cannot access memory at address 0x0
) at hwconf.c:978
#5 0x00127390 in __libc_start_main (main=0x804c580 <main>, argc=1,
ubp_av=0xbf89ab64, init=0x8060df0 <__libc_csu_init>,
fini=0x8060de0 <__libc_csu_fini>, rtld_fini=0x31e940 <_dl_fini>,
stack_end=0xbf89ab5c) at libc-start.c:220
#6 0x0804a151 in _start ()
Created attachment 290557 [details]
small patch to add else so as not to invoke isAliased with NULL dev->driver
Compiling the code from here: http://rhlinux.redhat.com/kudzu/ I get the same
I think there is a missing 'else' in hwconf.c.
Just more context:
-booted into Fedora 8 i686 Developer Spin
-tested that sound worked
-installed to disk
-booted from disk == kudzu segfaulting
-running from command-line == kudzu segfaulting
-sound not working because of incompletly configured sound card (PCM device
missing) - side effects is that a bunch of apps that depend on sound were crashing!
-compiled and patched (see comment #12)
-compiled kudzu runs ok
-original kudzu does not segfault anymore, sound works
I think that somewhere at the disk installation from the live dvd the
/etc/modprobe.conf got broken into a format that made dev->drive NULL thus
triggering the segfault. Once I fixed that, kudzu runs ok (probably because
modprobe.conf is corrected).
Sadly, I did not keep the original modprobe.conf so if someone else gets this
bug, please upload your modprobe.conf
Created attachment 291003 [details]
patch for this issue
Ricky - thanks for the debugging. Here's what I'm committing.
kudzu-22.214.171.124-1 has been pushed to the Fedora 8 testing repository. If problems still persist, please make note of it in this bug report.
If you want to test the update, you can install it with
su -c 'yum --enablerepo=updates-testing update kudzu'
kudzu-126.96.36.199-1 has been pushed to the Fedora 8 stable repository. If problems still persist, please make note of it in this bug report.