Bug 445656

Summary:	nscd frequent segfaults
Product:	[Fedora] Fedora	Reporter:	Neal Becker <ndbecker2>
Component:	glibc	Assignee:	Jakub Jelinek <jakub>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	9	CC:	csnook, k.georgiou, mars, matteo
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	2.8-8	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-07-23 07:08:35 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Neal Becker 2008-05-08 10:53:44 UTC

Description of problem:
I see these several times/day:
May  8 06:19:23 nbecker1 kernel: nscd[3200]: segfault at 7f90cba628f2 ip
7f9090402e51 sp 416a9d00 error 4 in nscd[7f90903f2000+1e000]


Version-Release number of selected component (if applicable):
rpm -q nscd
nscd-2.8-3.x86_64

How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

Comment 1 Bug Zapper 2008-05-14 10:50:06 UTC

Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping

Comment 2 Matteo Corti 2008-05-15 13:35:42 UTC

I have the same problem. The first occurence was just after upgrading from F8 to F9.

$ grep nscd messages
May 14 16:28:26 matteo nscd: 1810 invalid persistent database file
"/var/db/nscd/hosts": verification failed
May 14 16:43:53 matteo kernel: nscd[1819]: segfault at ffff42d0 ip 00141b44 sp
afb2bdec error 4 in libpthread-2.8.so[139000+15000]
May 14 16:47:52 matteo nscd: 1823 invalid persistent database file
"/var/db/nscd/hosts": verification failed
May 14 17:03:53 matteo kernel: nscd[1815]: segfault at ffffffd0 ip 00141b44 sp
afbe9e44 error 4 in libpthread-2.8.so[139000+15000]
May 15 08:09:38 matteo nscd: 11843 invalid persistent database file
"/var/db/nscd/hosts": verification failed
May 15 08:56:38 matteo kernel: nscd[11845]: segfault at ffe55ee4 ip b8059025 sp
ade55e40 error 6 in nscd[b8048000+1e000]
May 15 15:04:06 matteo kernel: nscd[3491]: segfault at ffc00014 ip b80e1a40 sp
afda7e54 error 4 in nscd[b80d0000+1e000]
May 15 15:23:24 matteo nscd: 29053 invalid persistent database file
"/var/db/nscd/group": verification failed
May 15 15:23:24 matteo nscd: 29053 invalid persistent database file
"/var/db/nscd/hosts": verification failed

Deleting the cache in /var/db does not solve the problem

Comment 3 Matthew A. R. Sherian 2008-05-16 18:17:06 UTC

Ditto here.
It is mitigated by disabling LDAP authentication.

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

May 12 12 segfault at 7f032593c3bf ip 7f0235aa3f28 sp 42225d00 error 4 in
nscd[7f0235a93000+1e000]
May 13 10 segfault at 7f70be3ce3bf ip 7f6fcc56af28 sp 40e91d00 error 4 in
nscd[7f6fcc55a000+1e000]
May 13 12 segfault at 41261000 ip 7f281c733eee sp 4125fb50 error 6 in
nscd[7f281c722000+1e000]
May 13 14 segfault at 7f752be45438 ip 7f752a037e16 sp 420ffab0 error 4 in
nscd[7f752a026000+1e000]
May 13 16 segfault at bb0 ip 7fdd43c7ce29 sp 41bb6b10 error 4 in
nscd[7fdd43c6b000+1e000]
May 13 16 segfault at 7fb2aa376744 ip 7fb27223ecd2 sp 4061eb90 error 6 in
nscd[7fb27222d000+1e000]
May 14 10 SELinux is preventing gnotravex (games_t) "write" to socket
(nscd_var_run_t). For complete SELinux messages. run sealert -l
6123dd5e-4c37-4879-8637-bec7d04687ed
May 14 11 segfault at 7f526f7649e7 ip 7f520531f7f4 sp 4175d890 error 4 in
nscd[7f520530e000+1e000]
May 14 13 segfault at 7f9553b3592f ip 7f951a859e90 sp 40721f08 error 4 in
libc-2.8.so[7f951a7d9000+162000]
May 14 14 segfault at 400000013 ip 7fafcb81160b sp 41d6ebc0 error 4 in
nscd[7fafcb7ff000+1e000]
May 14 14 segfault at 7fccaa2e5721 ip 7fcc53dfaf28 sp 41604d00 error 4 in
nscd[7fcc53dea000+1e000]
May 16 10 segfault at 7f988e070079 ip 7f9876d387f4 sp 423d7890 error 4 in
nscd[7f9876d27000+1e000]
May 16 11 segfault at 7f50f397d438 ip 7f50a376fe16 sp 41d15a90 error 4 in
nscd[7f50a375e000+1e000]

Comment 4 Matteo Corti 2008-05-17 05:53:02 UTC

Not really. In my case it happens frequently on three different machines none of
which has LDAP authentication enables. All three just have local accounts.

Comment 5 Kostas Georgiou 2008-05-22 13:16:45 UTC


*** This bug has been marked as a duplicate of 430324 ***

Comment 6 Chris Snook 2008-06-25 17:35:55 UTC

Getting this on a fully-updated F9 x86_64 box using local authentication.  It
*seems* to only happen when logged into my VPN (using NetworkManager + vpnc), so
I think it's not liking something about the switch in resolv.conf.

Comment 7 Fedora Update System 2008-07-08 20:27:28 UTC

glibc-2.8-7 has been submitted as an update for Fedora 9

Comment 8 Fedora Update System 2008-07-23 07:08:25 UTC

glibc-2.8-8 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.