Hi there, We are having some very odd crashes (SIGSEGV) on one of our servers - we found in logs that each crash always happens 1-2 seconds after there are AXFR requests from one particular DNS server (I doubt that it's a coincidence).
-- OS: Linux, Debian Etch Kernel: 2.6.18-6-686 Powerdns-server: 2.9.20-8+etch1 -- Did anyone notice similar crashes ? Thanks, Marek Kroemeke ----- cut ----- Jun 28 07:07:14 pdns[3078]: Got a signal 11, attempting to print trace: Jun 28 07:07:14 pdns[3078]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 28 07:07:14 pdns[3078]: [0xb7f74420] Jun 28 07:07:14 pdns[3078]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 28 07:07:14 pdns[3078]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 28 07:07:14 pdns[3078]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e2f240] Jun 28 07:07:14 pdns[3078]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7dc449e] Jun 28 07:07:15 pdns[31421]: Our pdns instance (3078) exited after signal 6 Jun 28 07:07:15 pdns[31421]: Respawning Jun 28 07:07:16 pdns[10651]: Guardian is launching an instance -- Jun 28 13:42:48 pdns[10651]: Got a signal 11, attempting to print trace: Jun 28 13:42:48 pdns[10651]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 28 13:42:48 pdns[10651]: [0xb7f77420] Jun 28 13:42:48 pdns[10651]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 28 13:42:48 pdns[10651]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 28 13:42:48 pdns[10651]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e32240] Jun 28 13:42:48 pdns[10651]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7dc749e] Jun 28 13:42:49 pdns[31421]: Our pdns instance (10651) exited after signal 6 Jun 28 13:42:49 pdns[31421]: Respawning Jun 28 13:42:50 pdns[20919]: Guardian is launching an instance -- Jun 28 14:24:05 pdns[20919]: Got a signal 11, attempting to print trace: Jun 28 14:24:05 pdns[20919]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 28 14:24:05 pdns[20919]: [0xb7f2d420] Jun 28 14:24:05 pdns[20919]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 28 14:24:05 pdns[20919]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 28 14:24:05 pdns[20919]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7de8240] Jun 28 14:24:05 pdns[20919]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7d7d49e] Jun 28 14:24:05 pdns[31421]: Our pdns instance (20919) exited after signal 6 Jun 28 14:24:05 pdns[31421]: Respawning Jun 28 14:24:06 pdns[25298]: Guardian is launching an instance -- Jun 28 16:26:10 pdns[25298]: Got a signal 11, attempting to print trace: Jun 28 16:26:10 pdns[25298]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 28 16:26:10 pdns[25298]: [0xb7f81420] Jun 28 16:26:11 pdns[25298]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 28 16:26:11 pdns[25298]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 28 16:26:11 pdns[25298]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e3c240] Jun 28 16:26:11 pdns[25298]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7dd149e] Jun 28 16:26:11 pdns[31421]: Our pdns instance (25298) exited after signal 6 Jun 28 16:26:11 pdns[31421]: Respawning Jun 28 16:26:12 pdns[6046]: Guardian is launching an instance -- Jun 28 16:41:10 pdns[6046]: Got a signal 11, attempting to print trace: Jun 28 16:41:10 pdns[6046]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 28 16:41:10 pdns[6046]: [0xb7f3f420] Jun 28 16:41:10 pdns[6046]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 28 16:41:10 pdns[6046]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 28 16:41:10 pdns[6046]: AXFR of domain 'thedisabilitychallenge.com' initiated by 69.41.170.223 Jun 28 16:41:10 pdns[6046]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7dfa240] Jun 28 16:41:10 pdns[6046]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7d8f49e] Jun 28 16:41:10 pdns[31421]: Our pdns instance (6046) exited after signal 6 Jun 28 16:41:10 pdns[31421]: Respawning -- Jun 28 16:45:09 pdns[7682]: Got a signal 11, attempting to print trace: Jun 28 16:45:09 pdns[7682]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 28 16:45:09 pdns[7682]: [0xb7f6b420] Jun 28 16:45:10 pdns[7682]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 28 16:45:10 pdns[7682]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 28 16:45:10 pdns[7682]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e26240] Jun 28 16:45:10 pdns[7682]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7dbb49e] Jun 28 16:45:10 pdns[31421]: Our pdns instance (7682) exited after signal 6 Jun 28 16:45:10 pdns[31421]: Respawning Jun 28 16:45:10 pdns[8301]: Guardian is launching an instance -- Jun 28 22:33:00 pdns[8301]: Got a signal 11, attempting to print trace: Jun 28 22:33:00 pdns[8301]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 28 22:33:00 pdns[8301]: [0xb7fde420] Jun 28 22:33:00 pdns[8301]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 28 22:33:00 pdns[8301]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 28 22:33:00 pdns[8301]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e99240] Jun 28 22:33:00 pdns[8301]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7e2e49e] Jun 28 22:33:00 pdns[31421]: Our pdns instance (8301) exited after signal 6 Jun 28 22:33:00 pdns[31421]: Respawning Jun 28 22:33:01 pdns[15035]: Guardian is launching an instance -- Jun 28 22:55:49 pdns[15035]: Got a signal 11, attempting to print trace: Jun 28 22:55:49 pdns[15035]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 28 22:55:49 pdns[15035]: [0xb7f6b420] Jun 28 22:55:49 pdns[15035]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 28 22:55:49 pdns[15035]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 28 22:55:49 pdns[15035]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e26240] Jun 28 22:55:49 pdns[15035]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7dbb49e] Jun 28 22:55:49 pdns[31421]: Our pdns instance (15035) exited after signal 6 Jun 28 22:55:49 pdns[31421]: Respawning Jun 28 22:55:50 pdns[17623]: Guardian is launching an instance -- Jun 29 00:01:52 pdns[17623]: Got a signal 11, attempting to print trace: Jun 29 00:01:52 pdns[17623]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 29 00:01:52 pdns[17623]: [0xb7f88420] Jun 29 00:01:52 pdns[17623]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 29 00:01:52 pdns[17623]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 29 00:01:52 pdns[17623]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e43240] Jun 29 00:01:53 pdns[17623]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7dd849e] Jun 29 00:01:53 pdns[31421]: Our pdns instance (17623) exited after signal 6 Jun 29 00:01:53 pdns[31421]: Respawning Jun 29 00:01:53 pdns[25601]: Guardian is launching an instance -- Jun 29 00:44:03 pdns[25601]: Got a signal 11, attempting to print trace: Jun 29 00:44:03 pdns[25601]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 29 00:44:03 pdns[25601]: [0xb7f52420] Jun 29 00:44:03 pdns[25601]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 29 00:44:03 pdns[25601]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 29 00:44:03 pdns[25601]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e0d240] Jun 29 00:44:03 pdns[25601]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7da249e] Jun 29 00:44:03 pdns[31421]: Our pdns instance (25601) exited after signal 6 Jun 29 00:44:03 pdns[31421]: Respawning Jun 29 00:44:04 pdns[29822]: Guardian is launching an instance -- Jun 29 00:45:08 pdns[29822]: Got a signal 11, attempting to print trace: Jun 29 00:45:08 pdns[29822]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 29 00:45:08 pdns[29822]: [0xb7f31420] Jun 29 00:45:08 pdns[29822]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 29 00:45:08 pdns[29822]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 29 00:45:08 pdns[29822]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7dec240] Jun 29 00:45:08 pdns[29822]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7d8149e] Jun 29 02:32:45 pdns[6566]: Guardian is launching an instance -- Jun 29 04:53:34 pdns[6566]: Got a signal 11, attempting to print trace: Jun 29 04:53:34 pdns[6566]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 29 04:53:34 pdns[6566]: [0xb7f6f420] Jun 29 04:53:34 pdns[6566]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 29 04:53:35 pdns[6566]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 29 04:53:35 pdns[6566]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e2a240] Jun 29 04:53:35 pdns[6566]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7dbf49e] -- Jun 29 05:37:34 pdns[20512]: Got a signal 11, attempting to print trace: Jun 29 05:37:35 pdns[20512]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 29 05:37:35 pdns[20512]: [0xb7f77420] Jun 29 05:37:35 pdns[20512]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 29 05:37:35 pdns[20512]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 29 05:37:35 pdns[20512]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e32240] Jun 29 05:37:35 pdns[20512]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7dc749e] Jun 29 05:37:35 pdns[6564]: Our pdns instance (20512) exited after signal 6 Jun 29 05:37:35 pdns[6564]: Respawning Jun 29 05:37:36 pdns[24881]: Guardian is launching an instance Jun 29 07:33:00 pdns[24881]: Got a signal 11, attempting to print trace: Jun 29 07:33:00 pdns[24881]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 29 07:33:00 pdns[24881]: [0xb7f0a420] Jun 29 07:33:00 pdns[24881]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 29 07:33:00 pdns[24881]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 29 07:33:00 pdns[24881]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7dc5240] Jun 29 07:33:00 pdns[24881]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7d5a49e] Jun 29 07:33:00 pdns[6564]: Our pdns instance (24881) exited after signal 6 Jun 29 07:33:00 pdns[6564]: Respawning Jun 29 07:33:01 pdns[5184]: Guardian is launching an instance -- Jun 29 11:23:19 pdns[5184]: Got a signal 11, attempting to print trace: Jun 29 11:23:19 pdns[5184]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 29 11:23:19 pdns[5184]: [0xb7f28420] Jun 29 11:23:19 pdns[5184]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 29 11:23:19 pdns[5184]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 29 11:23:19 pdns[5184]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7de3240] Jun 29 11:23:19 pdns[5184]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7d7849e] Jun 29 11:23:20 pdns[6564]: Our pdns instance (5184) exited after signal 6 Jun 29 11:23:20 pdns[6564]: Respawning Jun 29 11:23:21 pdns[28770]: Guardian is launching an instance -- Jun 29 13:39:12 pdns[28770]: Got a signal 11, attempting to print trace: Jun 29 13:39:12 pdns[28770]: /usr/sbin/pdns_server-instance [0x80b76ba] Jun 29 13:39:12 pdns[28770]: [0xb7fc8420] Jun 29 13:39:12 pdns[28770]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver6doAXFRERKSsP9DNSPacketi+0x3ef) [0x80923cf] Jun 29 13:39:12 pdns[28770]: /usr/sbin/pdns_server-instance(_ZN13TCPNameserver12doConnectionEPv+0xede) [0x8094c9e] Jun 29 13:39:12 pdns[28770]: /lib/tls/i686/cmov/libpthread.so.0 [0xb7e83240] Jun 29 13:39:12 pdns[28770]: /lib/tls/i686/cmov/libc.so.6(__clone+0x5e) [0xb7e1849e] Jun 29 13:39:13 pdns[6564]: Our pdns instance (28770) exited after signal 6 Jun 29 13:39:13 pdns[6564]: Respawning Jun 29 13:39:14 pdns[11116]: Guardian is launching an instance ----- cut ----- -- All postal correspondence to: Positive House, 24 Broadway, London. 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