Urgent! SMTP/SASL problem after Kernel update

[teves]

Hello,

after updating the kernel on my Suse 10.1 perfect setup / ispconfig 2.28 server I cannot send mail anymore.

A
tail /var/log/messages
gives me
Mar 26 09:17:23 whitespace kernel: saslauthd[27570]: segfault at 00000000745dc280 rip 00002b3a74d1b6b0 rsp 00007fff36bd4528 error 4
Mar 26 09:17:24 whitespace kernel: saslauthd[27571]: segfault at 00000000745dc280 rip 00002b3a74d1b6b0 rsp 00007fff36bd4528 error 4
Mar 26 09:17:32 whitespace kernel: saslauthd[27572]: segfault at 00000000745dc280 rip 00002b3a74d1b6b0 rsp 00007fff36bd4528 error 4
Mar 26 09:17:32 whitespace kernel: saslauthd[27573]: segfault at 00000000745dc280 rip 00002b3a74d1b6b0 rsp 00007fff36bd4528 error 4

tail /var/log/mail.warn
results in
Mar 26 09:29:18 whitespace postfix/smtpd[27802]: warning: 203.210.253.236: hostname adsl.hnpt.com.vn verification failed: Name or service not known
Mar 26 09:30:21 whitespace postfix/smtpd[27847]: warning: SASL authentication failure: size read failed
Mar 26 09:30:21 whitespace postfix/smtpd[27847]: warning: SASL authentication failure: Password verification failed
Mar 26 09:30:21 whitespace postfix/smtpd[27847]: warning: p57A4C18A.dip0.t-ipconnect.de[87.164.193.138]: SASL PLAIN authentication failed
Mar 26 09:30:21 whitespace postfix/smtpd[27847]: warning: SASL authentication failure: size read failed

What has happened here? What can I do?
This is really urgent because I have ~150 Domains running here...

Thank you,
regards, Tom

[till]

Hi Tom,

did you reboot your server after installing the kernel?

[teves]

Hallo,

yes I did (and did it once again now).

regards, Tom

[till]

Are there any sasl updates pending? Please amke sure that you have disabled apparmor, maybe it is enabled again after the kernel update.

[teves]

Hello,

no I have the most actual sasl package.
apparmor is not running.
Would it be an option to downgrade the kernel to the old version?

regards, Tom

[till]

Would it be an option to downgrade the kernel to the old version?

Maybe, but I'am not sure if this might cause other trouble. Can you select an older kernel in grub when you boot or does SuSE removes the older kernel after the update? Segfaults might also be caused by hardware problems, But its not so likely that your hardware gets problems at the same time you updated your kernel.

Maybe one of the other users has a good idea?

[teves]

Hello,

well I will just take the risk now.
I need to find a solution NOW. In the worst case I will have to copy the status of yesterday back onto the first harddisk - I have two harddisks and did a dd from a to b before upgrading yesterday - but it would take a few hours at least.

Hm. It does not seem to work. I still get the segmentation fault.
I have also downgraded sasl now without success.
Any ideas?

regards, Tom

[till]

You can try to check your hardware with e.g. memcheck. Maybe its really a hardware problem, e.g. instable ram, that was triggered by the reboot.

[teves]

Hi,

I cannot tell if it is a hardware problem, but I don't believe it. Everything worked perfectly until now, and at the moment everything else (only exception: sasl) works perfectly.
This would be a strange hardware problem. (Well ok, I've seen a lot. )

Anyway: I don't believe in a hardware problem.

Thank you,
Tom

[teves]

Hello,

testsaslauthd -u web**_info -p *******

gives me the message

size read failed

Any ideas?

regards, Tom