Jeffrey D Anderson wrote:
On Sunday 25 May 2008 1:21:41 am Jan Iven wrote:
On 05/23/2008 07:07 PM, Jeffrey D Anderson wrote:
[..]
The "pam_console_apply" signal 13 (broken pipe) is obviously at the core
of the bug, but I don't know enough about pam to really understand what
is going wrong.
I would suggest to set up a test:
# strace -s 256 -f -o /tmp/somefile -p <PID_OF_GETTY_ON_CONSOLE>"
If you are running nscd, suggest to "strace" this as well.
Then repeat your login test, and search the tracefile(s) for signal 13,
identify which process held the other end of the pipe, and why it went
away - most likely some subprocess died/segfaulted without leaving other
traces in the logs.
Hope this helps
jan
Thanks for the suggestion. I ran the strace with both the new, problematic
nss_ldap, and the old version that works. I find three places where broken
pipes result.
Since this is obviously not an SL specific issue, I'm moving my debugging off
the list.
It looks like this is already reported as
https://bugzilla.redhat.com/show_bug.cgi?id=447881
No solution yet, though.
We have a similar problem on systems runnig SL5.1 after the update to
nss_ldap-253-12.el5.i386.
If nscd is not running we have:
- dbus (messagebus service) fails to start and so also hal
- tcsh reports 'broken pipe' for any command issued
- 'su - <user>' doesn't work
- login from console fails because of the shell.
If ncsd is running:
- dbus still fails to start (because the service starts at "22", before
ncsd (it starts at "30")) while all other problems seem to disappear.
We have investigated for a while and the problems are reproducible with:
- system just installed,
- ldap configurated with SSL support
- ncsd stopped
everythings works,
- yum update nss_ldap -> breaks ldap as described
- start ncsd -> fixes the problems as described
I don't think this problem is that already reported as
https://bugzilla.redhat.com/show_bug.cgi?id=447881
Sorry if it is not an SL specific issue and hope this can help someone else.
thanks,
Matteo
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Dott. Matteo | Dip. Fisica - Universita` di Padova | Ph. +390498277248
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