Full_Name: Christian Heimes Version: 2.4.45 OS: Fedora URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (2001:16b8:6097:b200:c324:8c3d:7869:1a1b)

While I was looking for memory leaks in python-ldap, Valgrind detected a memory leak in ldap_cancel:

==30178== 22 (16 direct, 6 indirect) bytes in 1 blocks are definitely lost in loss record 27 of 5,810 ==30178== at 0x4C2FB6B: malloc (vg_replace_malloc.c:299) ==30178== by 0x14CBD9E4: ber_memalloc_x (memory.c:228) ==30178== by 0x14CBC940: ber_flatten (io.c:437) ==30178== by 0x14A81733: ldap_cancel (cancel.c:50) ==30178== by 0x1485A3BA: l_ldap_cancel (LDAPObject.c:779) ==30178== by 0x4FC24EF: PyCFunction_Call (in /usr/lib64/libpython3.6m.so.1.0) ==30178== by 0x4FF891C: _PyEval_EvalFrameDefault (in /usr/lib64/libpython3.6m.so.1.0) ==30178== by 0x4F590B2: ??? (in /usr/lib64/libpython3.6m.so.1.0) ==30178== by 0x4F8BE10: ??? (in /usr/lib64/libpython3.6m.so.1.0) ==30178== by 0x4FC933D: ??? (in /usr/lib64/libpython3.6m.so.1.0) ==30178== by 0x4FF2EC9: _PyEval_EvalFrameDefault (in /usr/lib64/libpython3.6m.so.1.0) ==30178== by 0x4F590B2: ??? (in /usr/lib64/libpython3.6m.so.1.0)

I think the function is missing a call to ber_bvfree(cancelidvalp).

python-ldap issue: https://github.com/python-ldap/python-ldap/issues/82 Code: https://github.com/openldap/openldap/blob/master/libraries/libldap/cancel.c#...