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Example valgrind output: ==22502== 22,747,002 bytes in 21,049 blocks are possibly lost in loss record 1,075 of 1,075 ==22502== at 0x4C29F73: malloc (vg_replace_malloc.c:309) ==22502== by 0x11D7089C: _talloc_pooled_object (in /usr/lib64/libtalloc.so.2.1.16) ==22502== by 0x9027834: tcopy_passwd (in /usr/lib64/libsmbconf.so.0) ==22502== by 0x6A1E1A3: pdb_copy_sam_account (in /usr/lib64/libsamba-passdb.so.0.27.2) ==22502== by 0x6A28AB7: pdb_getsampwnam (in /usr/lib64/libsamba-passdb.so.0.27.2) ==22502== by 0x65D0BC4: check_sam_security (in /usr/lib64/samba/libauth-samba4.so) ==22502== by 0x65C70F0: ??? (in /usr/lib64/samba/libauth-samba4.so) ==22502== by 0x65C781A: auth_check_ntlm_password (in /usr/lib64/samba/libauth-samba4.so) ==22502== by 0x14E464: ??? (in /usr/sbin/winbindd) ==22502== by 0x151CED: winbind_dual_SamLogon (in /usr/sbin/winbindd) ==22502== by 0x152072: winbindd_dual_pam_auth_crap (in /usr/sbin/winbindd) ==22502== by 0x167DE0: ??? (in /usr/sbin/winbindd) ==22502== by 0x12F29B12: tevent_common_invoke_fd_handler (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x12F30086: ??? (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x12F2E056: ??? (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x12F2925C: _tevent_loop_once (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x16A243: ??? (in /usr/sbin/winbindd) ==22502== by 0x16AA04: ??? (in /usr/sbin/winbindd) ==22502== by 0x12F29F68: tevent_common_invoke_immediate_handler (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x12F29F8F: tevent_common_loop_immediate (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x12F2FE3C: ??? (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x12F2E056: ??? (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x12F2925C: _tevent_loop_once (in /usr/lib64/libtevent.so.0.9.39) ==22502== by 0x12F4C7: main (in /usr/sbin/winbindd) You can find one for each string in pdb_copy_sam_account(), in total this already has 67 MB in total for this valgrind run. pdb_getsampwnam() -> memcache_add_talloc(NULL, PDB_GETPWSID_CACHE, ...) BUG: https://bugzilla.samba.org/show_bug.cgi?id=15169 Signed-off-by: Andreas Schneider <asn@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> Autobuild-User(master): Jeremy Allison <jra@samba.org> Autobuild-Date(master): Fri Sep 16 20:30:31 UTC 2022 on sn-devel-184