[Fedora-directory-devel] Please review: [Bug 491215] mmldif crashes in PK11_CreateDigestContext

[Noriko Hosoi]

Summary: mmldif crashes in PK11_CreateDigestContext

https://bugzilla.redhat.com/show_bug.cgi?id=491215

Description of problem:
Reported by Neuron Ring.
1. I need to merge to input files using mmldif tool
2. I m exporting it to a ldif file using db2ldif tool

/opt/dirsrv/slapd-<instance1> /db2ldif -n <backend_instance1>
/opt/dirsrv/slapd-<instance1> /db2ldif -n <backend_instance2>

3. I got two ldif files by exporting two directory server instance databases.
One.ldif
dn: sn=Jensen,dc=siroe,dc=com
objectclass: top
objectclass: person
cn: Babs Jensen
sn: Jensen
telephoneNumber: 555-5550
createTimestamp: 100

dn: sn=Minsky,dc=siroe,dc=com
objectclass: top
objectclass: person
cn: Pete Minsky
sn: Minsky
telephoneNumber: 555-5551
createTimestamp: 100

dn: sn=Rose,dc=siroe,dc=com
objectclass: top
objectclass: person
cn: Paula Rose
sn: Rose
telephoneNumber: 555-5552
createTimestamp: 100

Two.ldif

dn: sn=Jensen,dc=siroe,dc=com
objectclass: top
objectclass: person
cn: Babs Jensen
sn: Jensen
telephoneNumber: 555-5550
createTimestamp: 100

dn: sn=Minsky,dc=siroe,dc=com
objectclass: top
objectclass: person
cn: Pete Minsky
sn: Minsky
telephoneNumber: 555-5559
modifyTimestamp: 200

dn: sn=Morris,dc=siroe,dc=com
objectclass: top
objectclass: person
cn: Ted Morris
sn: Morris
telephoneNumber: 555-5558
createTimestamp: 200

dn: sn=Rose,dc=siroe,dc=com
objectclass: nsTombstone
deleteTimestamp: 200

4. Now I m trying to use mmldif tool.
5. /opt/dirsrv/bin/mmldif -c -D -o /home/neuronring/output.ldif   /home/
neuronring/one.ldif   /home/ neuronring/two.ldif
6. Finally everything IN VAIN, I got the following error: 

[18/Mar/2009:11:35:04 +051800] - finger printing directory 0
[18/Mar/2009:11:35:04 +051800] - db0: dn: sn=Jensen,dc=siroe,dc=com
/opt/dirsrv/bin/mmldif[50]: 18247 Memory fault(coredump)

The following files are created in my path. 
1. one.ldif.delta
2. two.ldif.delta
These two files has no data 0 bytes size.
3. core – size 1882552 bytes

Even I tried exporting the database with –r option (for replica) after stopping
the instance. I m getting this error continuously with different error numbers
like, /opt/dirsrv/bin/mmldif[50]: 10854 Memory fault(coredump). 

Somebody please suggest me to resolve this issue.

Thanks in advance,
Neuron Ring.

[Stacktrace from the crash]
Core was generated by `/usr/bin/mmldif-bin -o exampleM.ldif ./example0.ldif
./example1.ldif'.
Program terminated with signal 11, Segmentation fault.
[New process 31424]
#0  0x00007f57fac11acb in NSSRWLock_LockRead_Util (rwlock=0x0) at nssrwlk.c:177
177     PZ_Lock(rwlock->rw_lock);
Missing separate debuginfos, use: debuginfo-install cyrus-sasl.x86_64
e2fsprogs.x86_64 keyutils.x86_64 krb5.x86_64 libselinux.x86_64 svrcore.x86_64
(gdb) bt
#0  0x00007f57fac11acb in NSSRWLock_LockRead_Util (rwlock=0x0) at nssrwlk.c:177
#1  0x00007f57fb0791bb in SECMOD_GetReadLock (modLock=0x0) at pk11list.c:71
#2  0x00007f57fb09d43e in PK11_GetAllTokens (type=544, needRW=0, loadCerts=1, 
    wincx=0x0) at pk11slot.c:1786
#3  0x00007f57fb09d67a in PK11_GetBestSlotMultiple (type=0x7fff03620438, 
    mech_count=1, wincx=0x0) at pk11slot.c:1876
#4  0x00007f57fb09d8e0 in PK11_GetBestSlot (type=544, wincx=0x0)
    at pk11slot.c:1937
#5  0x00007f57fb07741a in PK11_CreateDigestContext (hashAlg=SEC_OID_SHA1)
    at pk11cxt.c:411
#6  0x0000000000402d99 in hashname (seed=-76 '�', attrib=0x7f57fa686cb0, 
    hashkey=0x7fff03620660 "�\212�\034<")
    at ldap/servers/slapd/tools/mmldif.c:936
#7  0x00000000004014b0 in mm_diff (statsp=0x7fff036206c0)
    at ldap/servers/slapd/tools/mmldif.c:375
#8  0x00000000004045f5 in main (argc=5, argv=0x7fff03620828)
    at ldap/servers/slapd/tools/mmldif.c:1479

Cause: secmod module list / module list lock is NULL.

[Proposed fix]
Created an attachment (id=335932)
 --> (https://bugzilla.redhat.com/attachment.cgi?id=335932)
cvs diff ldapserver/ldap/servers/slapd/tools/mmldif.c

Description: NSS was not initialized.  Since cert db, key db, or secmod db are
not needed, changed to call NSS_NoDB_Init to initialize NSS.



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