Re: (ITS#6478) slapd crashes with segfault

[hyc@symas.com]

wolfgang.hummel@hp.com wrote:
> We managed to install it with debug-symbols now,
> but did not have a new crash (yet).
>
> However we did a deeper anaylysis of existing
> crashes.
> Here is the outcome:

> #0  0x00000037a4e30045 in raise () from /lib64/libc.so.6
> (gdb) thread apply all bt
>
> Thread 3 (process 17892):
> #0  0x00000037a5a075a5 in pthread_join () from /lib64/libpthread.so.0
> #1  0x000000000043402c in slapd_daemon () at ../../../servers/slapd/daemon.=
> c:2834
> #2  0x0000000000420d75 in main (argc=3D5, argv=3D0x7fff3a6ee4b8) at ../../.=
> ./servers/slapd/main.c:953
>
> Thread 2 (process 17894):
> #0  0x00000037a5a0a496 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/lib=
> pthread.so.0
> #1  0x000000000052fdab in ldap_pvt_thread_pool_destroy (tpool=3D0x8635e8, r=
> un_pending=3D487320688) at ../../../libraries/libldap_r/tpool.c:558
> #2  0x000000000043767c in slapd_daemon_task (ptr=3D<value optimized out>) a=
> t ../../../servers/slapd/daemon.c:2764
> #3  0x00000037a5a062e7 in start_thread () from /lib64/libpthread.so.0
> #4  0x00000037a4ece3bd in clone () from /lib64/libc.so.6
>
> Thread 1 (process 17895):
> #0  0x00000037a4e30045 in raise () from /lib64/libc.so.6
> #1  0x00000037a4e31ae0 in abort () from /lib64/libc.so.6
> #2  0x00000037a4e681bb in __libc_message () from /lib64/libc.so.6
> #3  0x00000037a4e6f444 in _int_free () from /lib64/libc.so.6
> #4  0x00000037a4e72a6c in free () from /lib64/libc.so.6
> #5  0x0000000000559e07 in sb_rdahead_remove (sbiod=3D0x2aaac488d0d0) at ../=
> ../../libraries/liblber/sockbuf.c:606
> #6  0x0000000000559fb9 in ber_sockbuf_free (sb=3D0x2aaac488d0d0) at ../../.=
> ./libraries/liblber/sockbuf.c:71
> #7  0x0000000000000000 in ?? ()

This is quite unlikely to be a valid trace, since sb_rdahead_remove is only 
used on UDP sockets, and UDP socket support is not enabled by default nor is 
there a configure switch to enable it.

-- 
   -- Howard Chu
   CTO, Symas Corp.           http://www.symas.com
   Director, Highland Sun     http://highlandsun.com/hyc/
   Chief Architect, OpenLDAP  http://www.openldap.org/project/