strange segfault with 8.3.8
hello,
from kernel log:
Dec 7 07:24:45 nsXXXXXX kernel: postgres[22481]: segfault at 7fda5e1d5000
ip 00007fda604553c3 sp 00007fffe41faf28 error 4 in libc-2.9.so
[7fda603d1000+168000]
Dec 7 07:24:45 nsXXXXXX kernel: grsec: From XX.YY.ZZ.51: Segmentation fault
occurred at 00007fda5e1d5000 in
/usr/lib/postgresql/8.3/bin/postgres[postgres:22481] uid/euid:103/103
gid/egid:114/114, parent
/usr/lib/postgresql/8.3/bin/postgres[postgres:29857] uid/euid:103/103
gid/egid:114/114
This is on 8.3.8, latest Ubuntu distribution, server under quite heavy load.
afterwards we had some corrupted pages ("*ERROR: compressed data is corrupt*
").
any clues / directions welcome.
--
Filip Rembiałkowski
JID,mailto:filip.rembialkowski@gmail.com
http://filip.rembialkowski.net/
Filip Rembiałkowski wrote:
Dec 7 07:24:45 nsXXXXXX kernel: postgres[22481]: segfault at
7fda5e1d5000 ip 00007fda604553c3 sp 00007fffe41faf28 error 4 in
libc-2.9.so <http://libc-2.9.so/>[7fda603d1000+168000]
Dec 7 07:24:45 nsXXXXXX kernel: grsec: From XX.YY.ZZ.51: Segmentation
fault occurred at 00007fda5e1d5000 in
/usr/lib/postgresql/8.3/bin/postgres[postgres:22481] uid/euid:103/103
gid/egid:114/114, parent
/usr/lib/postgresql/8.3/bin/postgres[postgres:29857] uid/euid:103/103
gid/egid:114/114This is on 8.3.8, latest Ubuntu distribution, server under quite heavy
load.afterwards we had some corrupted pages ("//ERROR/: /compressed data/
is corrupt/").
Random segfaults only under heavy load with corrupted pages afterwards
normally means bad RAM. I'd suggest a round of memtest86+ on the system
if it's PC hardware.
--
Greg Smith 2ndQuadrant Baltimore, MD
PostgreSQL Training, Services and Support
greg@2ndQuadrant.com www.2ndQuadrant.com
W dniu 7 grudnia 2009 17:43 użytkownik Greg Smith <greg@2ndquadrant.com>napisał:
Filip Rembiałkowski wrote:
Dec 7 07:24:45 nsXXXXXX kernel: postgres[22481]: segfault at 7fda5e1d5000
ip 00007fda604553c3 sp 00007fffe41faf28 error 4 in libc-2.9.so
[7fda603d1000+168000]
Dec 7 07:24:45 nsXXXXXX kernel: grsec: From XX.YY.ZZ.51: Segmentation
fault occurred at 00007fda5e1d5000 in
/usr/lib/postgresql/8.3/bin/postgres[postgres:22481] uid/euid:103/103
gid/egid:114/114, parent
/usr/lib/postgresql/8.3/bin/postgres[postgres:29857] uid/euid:103/103
gid/egid:114/114This is on 8.3.8, latest Ubuntu distribution, server under quite heavy
load.afterwards we had some corrupted pages ("*ERROR: compressed data is
corrupt*").Random segfaults only under heavy load with corrupted pages afterwards
normally means bad RAM. I'd suggest a round of memtest86+ on the system if
it's PC hardware.
Just a note for all other who may encouter this problem:
This was not a vanilla Ubuntu - this was vendor-modified version, witch
custom grsecurity patched kernel and probably with custom patched libc.
# uname -a
Linux nsXXXXXX.ovh.net
2.6.31.5-grsec-xxxx-grs-ipv4-64 #2 SMP Thu Nov 5 12:36:20 UTC 2009
x86_64 GNU/Linux
--
Filip Rembiałkowski
JID,mailto:filip.rembialkowski@gmail.com
http://filip.rembialkowski.net/