Some errors with SIGSEGV

matthias.flittner at nethinks.com matthias.flittner at nethinks.com
Thu Mar 22 07:57:04 CET 2007
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I compiled nagios on a cleanly system. And I don't use NDOUtils, but this 
SIGSEGV happens nevertheless.
What can I do to run nagios.

Thanks in advance

FliTTi



> Message: 8
> Date: Wed, 21 Mar 2007 11:14:33 -0600
> From: Ethan Galstad <nagios at nagios.org>
> Subject: Re: [Nagios-devel] Some errors with SIGSEGV
> To: Nagios Developers List <nagios-devel at lists.sourceforge.net>
> Message-ID: <460167F9.4060504 at nagios.org>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> matthias.flittner at nethinks.com wrote:
> > 
> > If I'm running Nagios 3.0a1 it crashes always after a few seconds.
> > 
> > In the log I only found:
> > Mar  8 15:35:18 nagios: Nagios 3.0a1 starting... (PID=24492)
> > Mar  8 15:35:18 nagios: LOG VERSION: 2.0
> > Mar  8 15:35:18 nagios: Finished daemonizing... (New PID=24493)
> > Mar  8 15:35:28 nagios: HOST ALERT: localhost;UP;SOFT;2;PING OK - 
Packet 
> > loss = 0%, RTA = 0.05 ms 
> > <http://dict.leo.org/ende?lp=ende&p=/gQPU.&search=always>
> > 
> > 
> > 
> > Here the last signs of life captured by strace:
> > rename("/usr/local/nagios/var/nagios.tmpNdmpn0", 
> > "/usr/local/nagios/var/status.dat") = 0
> > gettimeofday({1173359616, 173629}, NULL) = 0
> > time([1173359616])                      = 1173359616
> > gettimeofday({1173359616, 173998}, NULL) = 0
> > time([1173359616])                      = 1173359616
> > gettimeofday({1173359616, 174363}, NULL) = 0
> > gettimeofday({1173359616, 174552}, NULL) = 0
> > time([1173359616])                      = 1173359616
> > gettimeofday({1173359616, 174968}, NULL) = 0
> > time([1173359616])                      = 1173359616
> > time([1173359616])                      = 1173359616
> > gettimeofday({1173359616, 175746}, NULL) = 0
> > umask(077)                              = 02
> > gettimeofday({1173359616, 176092}, NULL) = 0
> > getpid()                                = 3459
> > open("/tmp/nagiosYBuC2d", O_RDWR|O_CREAT|O_EXCL, 0600) = 7
> > fcntl64(7, F_GETFL)                     = 0x2 (flags O_RDWR)
> > fstat64(7, {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
> > mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 

> > 0) = 0xb7fcf000
> > _llseek(7, 0, [0], SEEK_CUR)            = 0
> > umask(02)                               = 077
> > gettimeofday({1173359616, 177807}, NULL) = 0
> > time([1173359616])                      = 1173359616
> > clone(child_stack=0, 
> > flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, 
> > child_tidptr=0xb7e610c8) = 3467
> > --- SIGCHLD (Child exited) @ 0 (0) ---
> > close(7)                                = 0
> > munmap(0xb7fcf000, 4096)                = 0
> > waitpid(3467, NULL, 0)                  = 3467
> > time([1173359616])                      = 1173359616
> > time(NULL)                              = 1173359616
> > gettimeofday({1173359616, 183489}, NULL) = 0
> > gettimeofday({1173359616, 183686}, NULL) = 0
> > nanosleep({0, 250000000}, 0)            = ? ERESTART_RESTARTBLOCK (To 
be 
> > restarted)
> > +++ killed by SIGSEGV +++
> > 
> > 
> > 
> > This error captured bei gdb
> > nagios1:/usr/local/nagios/bin# gdb nagios
> > GNU gdb 6.3-debian
> > Copyright 2004 Free Software Foundation, Inc.
> > GDB is free software, covered by the GNU General Public License, and 
you are
> > welcome to change it and/or distribute copies of it under certain 
> > conditions.
> > Type "show copying" to see the conditions.
> > There is absolutely no warranty for GDB.  Type "show warranty" for 
details.
> > This GDB was configured as "i386-linux"...Using host libthread_db 
> > library "/lib/tls/libthread_db.so.1".
> > 
> > (gdb) r /usr/local/nagios/etc/nagios.cfg
> > Starting program: /usr/local/nagios/bin/nagios 
> > /usr/local/nagios/etc/nagios.cfg
> > [Thread debugging using libthread_db enabled]
> > [New Thread -1209560960 (LWP 931)]
> > 
> > Nagios 3.0a1
> > Copyright (c) 1999-2007 Ethan Galstad (http://www.nagios.org)
> > Last Modified: 03-06-2007
> > License: GPL
> > 
> > Nagios 3.0a1 starting... (PID=931)
> > [New Thread -1209775184 (LWP 934)]
> > [New Thread -1218163792 (LWP 935)]
> > 
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread -1218163792 (LWP 935)]
> > 0xb7eed215 in mallopt () from /lib/tls/libc.so.6
> > (gdb) bt
> > #0  0xb7eed215 in mallopt () from /lib/tls/libc.so.6
> > #1  0xb7eebf02 in realloc () from /lib/tls/libc.so.6
> > #2  0x0807785e in dbuf_strcat (db=0x80c6680,
> >    buf=0xb76448c0 
> > 
> 
"1=1\n2=localhost\n3=\n4=0\n5=1\n6=1\n7=/tmp/nagiosUJ95U0\n8=nan\n9=1173431091.
> 188930\n10=1173431095.208425\n11=0\n12=1\n13=0\n\n")
> >    at utils.c:4924
> > #3  0x08077d70 in check_result_worker_thread (arg=0x0) at utils.c:5373
> > #4  0xb7fb6b63 in start_thread () from /lib/tls/libpthread.so.0
> > #5  0xb7f5218a in clone () from /lib/tls/libc.so.6
> > 
> > 
> > 
> > 
> > 
> > This errors all happened on a Debian Sarge 32Bit Version with the 
Kernel 
> >  2.6.20.1
> > 
> > 
> > Thanks in advance,
> > FliTTi
> > 
> 
> Looks like this is the NDOMOD module that's causing the segfault.  Some 
> things changed with regards to object structures for 3.0a1, so I need to 

> release a new version of NDOUtils that will work properly with it.
> 
> 
> Ethan Galstad,
> Nagios Developer
> ---
> Email: nagios at nagios.org
> Website: http://www.nagios.org
> 
> 
> 
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> End of Nagios-devel Digest, Vol 10, Issue 23
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