0000025: segfault at 0 rip 42763f rsp

(0000077)
jorge (administrator)
2009-07-07 22:27

How many servers are you running?
check mydns.conf for:

servers =

(0000078)
ibc (reporter)
2009-07-07 22:31
edited on: 2009-07-07 22:32

I can't find that parameter in mydns.conf, neither in the mydns.conf provided in the sources.

However I find:
multicpu = 2 (I have two CPU's)

(0000080)
jorge (administrator)
2009-07-07 23:23

Sorry,
I wanted to say:
servers = 0

(0000082)
ibc (reporter)
2009-07-22 20:57

I've tryed with "servers = 0", "1", "2"... in combination with different
values in "multicpu" (-1, 0, 1, 2). In all the cases the segfault remains.

(0000083)
ibc (reporter)
2009-07-22 21:58

It occurs with any 1.2.8.X but doesn't occur with 1.2.7.

(0000084)
jorge (administrator)
2009-07-27 12:09

Anyway, i think this is something with grsecurity.
Can you disable grsec and test with it off?

(0000085)
ibc (reporter)
2009-07-27 20:00

Sorry, it's a hosted server in production (for other services than DNS) with a custom kernel compiled with no modules, and I cannot dissable it.

Could it be enough if I run mydns as root instead of as "nobody"?

(0000104)
jorge (administrator)
2009-11-15 17:37

IF you run MyDNS under GDB, can you get a stracktrace for me?

(0000116)
tlamy (developer)
2009-12-16 16:29

This may be related to a bug in libmysqlclient in Lenny x64, which should have been fixed already.
You can use "taskset" and configure for single CPU usage to prevent the crash.

See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513204#181 [^] for more details.

Please follow up if the problem still persits.

(0000117)
tlamy (developer)
2009-12-16 16:31

Bug is/was in libmysqlclient15off from Debian, which occured only on x64 multi-CPU environments
See: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513204#181 [^]

Notes
(0000077) jorge (administrator) 2009-07-07 22:27	How many servers are you running? check mydns.conf for: servers =

(0000078) ibc (reporter) 2009-07-07 22:31 edited on: 2009-07-07 22:32	I can't find that parameter in mydns.conf, neither in the mydns.conf provided in the sources. However I find: multicpu = 2 (I have two CPU's)

(0000080) jorge (administrator) 2009-07-07 23:23	Sorry, I wanted to say: servers = 0

(0000082) ibc (reporter) 2009-07-22 20:57	I've tryed with "servers = 0", "1", "2"... in combination with different values in "multicpu" (-1, 0, 1, 2). In all the cases the segfault remains.

(0000083) ibc (reporter) 2009-07-22 21:58	It occurs with any 1.2.8.X but doesn't occur with 1.2.7.

(0000084) jorge (administrator) 2009-07-27 12:09	Anyway, i think this is something with grsecurity. Can you disable grsec and test with it off?

(0000085) ibc (reporter) 2009-07-27 20:00	Sorry, it's a hosted server in production (for other services than DNS) with a custom kernel compiled with no modules, and I cannot dissable it. Could it be enough if I run mydns as root instead of as "nobody"?

(0000104) jorge (administrator) 2009-11-15 17:37	IF you run MyDNS under GDB, can you get a stracktrace for me?

(0000116) tlamy (developer) 2009-12-16 16:29	This may be related to a bug in libmysqlclient in Lenny x64, which should have been fixed already. You can use "taskset" and configure for single CPU usage to prevent the crash. See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513204#181 [^] for more details. Please follow up if the problem still persits.

(0000117) tlamy (developer) 2009-12-16 16:31	Bug is/was in libmysqlclient15off from Debian, which occured only on x64 multi-CPU environments See: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513204#181 [^]

Issue History
Date Modified	Username	Field	Change
2009-07-01 11:56	ibc	New Issue
2009-07-01 12:01	ibc	Issue Monitored: ibc
2009-07-07 22:26	jorge	Status	new => assigned
2009-07-07 22:26	jorge	Assigned To	=> howardwilkinson
2009-07-07 22:27	jorge	Note Added: 0000077
2009-07-07 22:31	ibc	Note Added: 0000078
2009-07-07 22:32	ibc	Note Edited: 0000078
2009-07-07 22:40	jorge	Note Added: 0000079
2009-07-07 23:23	jorge	Note Deleted: 0000079
2009-07-07 23:23	jorge	Note Added: 0000080
2009-07-22 20:57	ibc	Note Added: 0000082
2009-07-22 21:58	ibc	Note Added: 0000083
2009-07-27 12:09	jorge	Note Added: 0000084
2009-07-27 20:00	ibc	Note Added: 0000085
2009-11-15 17:37	jorge	Note Added: 0000104
2009-12-16 16:29	tlamy	Note Added: 0000116
2009-12-16 16:31	tlamy	Note Added: 0000117
2009-12-16 16:31	tlamy	Status	assigned => resolved
2009-12-16 16:31	tlamy	Resolution	open => no change required

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