[Bug 997096] Re: nscd segmentation fault

[Vincent Fortier]

root at cmo-cluster2:~# gdb -c core /usr/sbin/nscd
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
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Reading symbols from /usr/sbin/nscd...(no debugging symbols found)...done.
[New LWP 13858]
[New LWP 13850]
[New LWP 13856]
[New LWP 13855]
[New LWP 13857]
[New LWP 13854]
[New LWP 13853]
[New LWP 13852]
[New LWP 13851]

warning: Can't read pathname for load map: Input/output error.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `nscd -d'.
Program terminated with signal 11, Segmentation fault.
#0  __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:32
32	../sysdeps/x86_64/multiarch/../strlen.S: No such file or directory.
(gdb) backtrace
#0  __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:32
#1  0x000000000041afe1 in ?? ()
#2  0x000000000041bb5e in ?? ()
#3  0x00000000004071b7 in ?? ()
#4  0x00007fee33576e9a in start_thread (arg=0x7fee29027700) at pthread_create.c:308
#5  0x00007fee3308a4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

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https://bugs.launchpad.net/bugs/997096

Title:
  nscd segmentation fault

Status in “eglibc” package in Ubuntu:
  Confirmed

Bug description:
  nscd segfaults a few seconds after every getent netgroup requests:

  root at cmo-cluster2:~# nscd -d 
  Wed 09 May 2012 12:59:54 PM UTC - 13953: register trace file /etc/passwd for database passwd
  Wed 09 May 2012 12:59:54 PM UTC - 13953: register trace file /etc/group for database group
  Wed 09 May 2012 12:59:54 PM UTC - 13953: register trace file /etc/services for database services
  Wed 09 May 2012 12:59:54 PM UTC - 13953: register trace file /etc/netgroup for database netgroup
  Wed 09 May 2012 12:59:54 PM UTC - 13953: cannot stat() file `/etc/netgroup': No such file or directory
  Wed 09 May 2012 12:59:56 PM UTC - 13953: handle_request: request received (Version = 2) from PID 13962
  Wed 09 May 2012 12:59:56 PM UTC - 13953: 	GETFDNETGR
  Wed 09 May 2012 12:59:56 PM UTC - 13953: handle_request: request received (Version = 2) from PID 13962
  Wed 09 May 2012 12:59:56 PM UTC - 13953: 	GETNETGRENT (cmo-nfs-netgroup)
  Wed 09 May 2012 12:59:56 PM UTC - 13953: Haven't found "cmo-nfs-netgroup" in netgroup cache!
  Wed 09 May 2012 12:59:56 PM UTC - 13953: provide access to FD 11, for netgroup
  Segmentation fault (core dumped)

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