(ITS#3817) slapadd (glue?) dumps core under ridiculous situations

[richton@nbcs.rutgers.edu]

Full_Name: Aaron Richton
Version: 2.3.4
OS: Solaris 9
URL: 
Submission from: (NULL) (128.6.31.135)


Trying to add to a back-null database with the glue overlay, slapadd dumps
core.
I know that's utterly ridiculous, but at the same time, there's part of me that
believes (a) software really shouldn't dump core ever; I'd expect more like
"slapadd: database doesn't support necessary operations." and (b) I'm
concerned that this might be a symptom of a more real bug.


Quickly playing around with test011 -b null results in "slapadd: database
doesn't
support necessary operations." which is what I would expect. However, my
full-blown
config file results in:

slapadd: could not add entry dn="cn=facstaffView,dc=rutgers,dc=edu" (line=9):
Assertion failed: info->al_slot > 0, file alock.c, line 207
Abort (core dumped)

with a backtrace of:

#0  0xfed1f82c in _lwp_kill () from /usr/lib/libc.so.1
#1  0xfecd0a24 in raise () from /usr/lib/libc.so.1
#2  0xfecb6ce0 in abort () from /usr/lib/libc.so.1
#3  0xfecb6f80 in _assert () from /usr/lib/libc.so.1
#4  0x000fd7b8 in alock_read_slot (info=0x2b6ee0, slot_data=0xffbff584)
    at alock.c:207
#5  0x000fe7e8 in alock_close (info=0x2b6ee0) at alock.c:512
#6  0x00100df8 in bdb_db_close () at tools.c:314
#7  0x0006fdb8 in backend_shutdown (be=0x2b6c90) at backend.c:360
#8  0x001780bc in glue_close (bi=0x2b7528) at glue.c:539
#9  0x0006fd64 in backend_shutdown (be=0x2b8230) at backend.c:351
#10 0x0009f13c in slap_shutdown (be=0x2b8230) at init.c:203
#11 0x000ea158 in slap_tool_destroy () at slapcommon.c:604
#12 0x000e8380 in slapadd (argc=5, argv=0xffbffbbc) at slapadd.c:376
#13 0x000406e8 in main (argc=5, argv=0xffbffbbc) at main.c:279


I started trying to minimize my config file to get test011 into a repro case,
but the
symptoms changed. I think the major difference is lack of a "syncrepl"
directive;
then I receive:

slapadd: line 9: database (dc=rutgers,dc=edu) not configured to hold
"cn=blah,dc=rutgers,dc=edu"
slapadd: line 9: database (dc=rutgers,dc=edu) not configured to hold
"cn=blah,dc=rutgers,dc=edu"
followed by a SEGV. The stack trace from gdb:

#0  0x00177d24 in glue_tool_inst (bi=0x2a78e0) at glue.c:464
#1  0x00178900 in glue_tool_sync (b0=???) at glue.c:693

Incidently, pstack shows that glue_tool_sync in perpetuity, i.e.

 00177d24 glue_tool_inst (2a78e0, 24684c, 0, 0, 0, 0) + c
 001788f8 glue_tool_sync (2a7fe0, 24684c, 0, 0, 0, 0) + 10
 0017897c glue_tool_sync (2a7fe0, 24684c, 0, 0, 0, 0) + 94
 0017897c glue_tool_sync (2a7fe0, 24684c, 0, 0, 0, 0) + 94
 0017897c glue_tool_sync (2a7fe0, 24684c, 0, 0, 0, 0) + 94
[...infinitely...]
 0017897c glue_tool_sync (2a7fe0, 24684c, 0, 0, 0, 0) + 94
[...infinitely...]

Because the symptoms changed, I got scared off from trying to make a repro
case.
I can pick that up again if the backtraces aren't helpful. On the bright side,
this
is mind-numbingly easy to reproduce, so I can give -d -1 etc. with minimal
delay.
Coming up with a full test case for one (or, even worse, both) should be
possible too, but will obviously take longer.