Can you please help me understand the file content

Hi,

The sssd service of my ubuntu machine is crashing often, sometime due to Out of memory, this time I got a dump in /var/crash. Can someone help me understanding the file content, because it doesn't make sense. Thanks

Attaching the crash file. Thanks

ProblemType: Crash
Architecture: amd64
Date: Wed Jun 17 09:00:54 2020
DistroRelease: Ubuntu 16.04
ExecutablePath: /usr/sbin/sssd
ExecutableTimestamp: 1561018582
ProcAttrCurrent: /usr/sbin/sssd (complain)
ProcCmdline: /usr/sbin/sssd -i -f
ProcCwd: /
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
ProcMaps:
 00400000-                 /usr/sbin/sssd
 00611000-                 /usr/sbin/sssd
 00612000-                 /usr/sbin/sssd
 00bf3000-                 [heap]
 7f4b2ea94                  /var/lib/sss/mc/initgroups (deleted)
 7f4b2f338                 /lib/x86_64-linux-gnu/libnss_sss.so.2
 7f4b2f340                 /lib/x86_64-linux-gnu/libnss_sss.so.2
 7f4b2f53f                 /lib/x86_64-linux-gnu/libnss_sss.so.2
 7f4b2f540                 /lib/x86_64-linux-gnu/libnss_sss.so.2
 7f4b2f541                 /var/lib/sss/db/cache_MyOrg.ldb
 7f4b2fa9f                 /usr/lib/locale/locale-archive
 7f4b2fd77                 /lib/x86_64-linux-gnu/libnss_files-2.23.so
 7f4b2fd82                 /lib/x86_64-linux-gnu/libnss_files-2.23.so
 7f4b2ff81                 /lib/x86_64-linux-gnu/libnss_files-2.23.so
 7f4b2ff82                 /lib/x86_64-linux-gnu/libnss_files-2.23.so
 7f4b2ff83
 7f4b2ff89                 /lib/x86_64-linux-gnu/libnss_nis-2.23.so
 7f4b2ff941                   /lib/x86_64-linux-gnu/libnss_nis-2.23.so
 7f4b30193                 /lib/x86_64-linux-gnu/libnss_nis-2.23.so
 7f4b30194                 /lib/x86_64-linux-gnu/libnss_nis-2.23.so
 7f4b30195                 /lib/x86_64-linux-gnu/libnsl-2.23.so
 7f4b301ab                 /lib/x86_64-linux-gnu/libnsl-2.23.so
 7f4b303aa                 /lib/x86_64-linux-gnu/libnsl-2.23.so
 7f4b303ab                 /lib/x86_64-linux-gnu/libnsl-2.23.so
 7f4b303ac
 7f4b303ae                 /lib/x86_64-linux-gnu/libnss_compat-2.23.so
 7f4b303b6                 /lib/x86_64-linux-gnu/libnss_compat-2.23.so
 7f4b305b5                 /lib/x86_64-linux-gnu/libnss_compat-2.23.so
 7f4b305b6                 /lib/x86_64-linux-gnu/libnss_compat-2.23.so
 7f4b305d3                 /usr/lib/x86_64-linux-gnu/libtdb.so.1.3.8
 7f4b305e7                 /usr/lib/x86_64-linux-gnu/libtdb.so.1.3.8
 7f4b307e6                 /usr/lib/x86_64-linux-gnu/libtdb.so.1.3.8
 7f4b307e7                 /usr/lib/x86_64-linux-gnu/libtdb.so.1.3.8
 7f4b307e8                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/tdb.so
 7f4b307f5                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/tdb.so
 7f4ba309f                  /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/tdb.so
 7f4b309f5                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/tdb.so
 7f4b309f6                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/skel.so
 7f4b309f8                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/skel.so
 7f4ba30bf                  /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/skel.so
 7f4b30bf8                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/skel.so
 7f4b30bf9                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/server_sort.so
 7f4b30bfb                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/server_sort.so
 7f4b30dfa                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/server_sort.so
 7f4b30daf                  /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/server_sort.so
 7f4b30dfc                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/sample.so
 7f4b30dfd                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/sample.so
 7f4b30ffd                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/sample.so
 7f4b30ffe                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/sample.so
 7f4b30fff                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/rdn_name.so
 7f4b31002                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/rdn_name.so
 7f4b312a0                  /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/rdn_name.so
 7f4b31202                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/rdn_name.so
 7f4b31203                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/paged_searches.so
 7f4b31205                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/paged_searches.so
 7f4b3140a                  /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/paged_searches.so
 7f4b31406                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/paged_searches.so
 7f4b31407                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/paged_results.so
 7f4b31409                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/paged_results.so
 7f4b316a0                  /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/paged_results.so
 7f4b3160a                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/paged_results.so
 7f4b3160b                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/memberof.so
 7f4b3161a                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/memberof.so
 7f4b31819                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/memberof.so
 7f4b3181a                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/memberof.so
 7f4b3181b                 /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4
 7f4b31822                 /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4
 7f4b31aa2                  /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4
 7f4b31a22                 /usr/lib/x86_64-linux-gnu/libffi.so.6.0.4
 7f4b31a23                 /lib/x86_64-linux-gnu/libcrypt-2.23.so
 7f4b31a2c                 /lib/x86_64-linux-gnu/libcrypt-2.23.so
 7f4b31c2b                 /lib/x86_64-linux-gnu/libcrypt-2.23.so
 7f4b31c2c                 /lib/x86_64-linux-gnu/libcrypt-2.23.so
 7f4b31c2d
 7f4b31c5b                 /usr/lib/x86_64-linux-gnu/libsqlite3.so.0.8.6
 7f4b31d2b                 /usr/lib/x86_64-linux-gnu/libsqlite3.so.0.8.6
 7f4b31f2a                 /usr/lib/x86_64-linux-gnu/libsqlite3.so.0.8.6
 7f4b31f2d                 /usr/lib/x86_64-linux-gnu/libsqlite3.so.0.8.6
 7f4b31f2f
 7f4b31f30                 /usr/lib/x86_64-linux-gnu/libhx509.so.5.0.0
 7f4b31f7a                  /usr/lib/x86_64-linux-gnu/libhx509.so.5.0.0
 7f4b32176                 /usr/lib/x86_64-linux-gnu/libhx509.so.5.0.0
 7f4b32178                 /usr/lib/x86_64-linux-gnu/libhx509.so.5.0.0
 7f4b3217a
 7f4b3217b                 /usr/lib/x86_64-linux-gnu/libheimbase.so.1.0.0
 7f4b32189                 /usr/lib/x86_64-linux-gnu/libheimbase.so.1.0.0
 7f4b32388                 /usr/lib/x86_64-linux-gnu/libheimbase.so.1.0.0
 7f4b32389                 /usr/lib/x86_64-linux-gnu/libheimbase.so.1.0.0
 7f4b3238a                 /usr/lib/x86_64-linux-gnu/libwind.so.0.0.0
 7f4b323b1                 /usr/lib/x86_64-linux-gnu/libwind.so.0.0.0
 7f4b325b1                 /usr/lib/x86_64-linux-gnu/libwind.so.0.0.0
 7f4b325b2                 /usr/lib/x86_64-linux-gnu/libwind.so.0.0.0
 7f4b325b3                 /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.0
 7f4b32632                 /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.0
 7f4b32831                 /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.0
 7f4b32832                 /usr/lib/x86_64-linux-gnu/libgmp.so.10.3.0
 7f4b32833                 /usr/lib/x86_64-linux-gnu/libhogweed.so.4.2
 7f4b32865                 /usr/lib/x86_64-linux-gnu/libhogweed.so.4.2
 7f4b32a64                 /usr/lib/x86_64-linux-gnu/libhogweed.so.4.2
 7f4b32a65                 /usr/lib/x86_64-linux-gnu/libhogweed.so.4.2
 7f4b32a66                 /usr/lib/x86_64-linux-gnu/libnettle.so.6.2
 7f4b32a9a                 /usr/lib/x86_64-linux-gnu/libnettle.so.6.2
 7f4b32c99                 /usr/lib/x86_64-linux-gnu/libnettle.so.6.2
 7f4b32c9b                 /usr/lib/x86_64-linux-gnu/libnettle.so.6.2
 7f4b32c9c                 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.5.1
 7f4b32cad                 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.5.1
 7f4b32ead                 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.5.1
 7f4b32eae                 /usr/lib/x86_64-linux-gnu/libtasn1.so.6.5.1
 7f4b32eaf                 /usr/lib/x86_64-linux-gnu/libidn.so.11.6.15
 7f4b32ee0                 /usr/lib/x86_64-linux-gnu/libidn.so.11.6.15
 7f4b330e0                 /usr/lib/x86_64-linux-gnu/libidn.so.11.6.15
 7f4b330e1                 /usr/lib/x86_64-linux-gnu/libidn.so.11.6.15
 7f4b330e2                 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.1.0
 7f4b3313b                 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.1.0
 7f4b3333a                 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.1.0
 7f4b33344                 /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.1.0
 7f4b33346                 /lib/x86_64-linux-gnu/libz.so.1.2.8
 7f4b3335f                 /lib/x86_64-linux-gnu/libz.so.1.2.8
 7f4b3355e                 /lib/x86_64-linux-gnu/libz.so.1.2.8
 7f4b3355f                 /lib/x86_64-linux-gnu/libz.so.1.2.8
 7f4b33560                 /usr/lib/x86_64-linux-gnu/libroken.so.18.1.0
 7f4b33575                 /usr/lib/x86_64-linux-gnu/libroken.so.18.1.0
 7f4b33774                 /usr/lib/x86_64-linux-gnu/libroken.so.18.1.0
 7f4b33775                 /usr/lib/x86_64-linux-gnu/libroken.so.18.1.0
 7f4b33776                 /usr/lib/x86_64-linux-gnu/libhcrypto.so.4.1.0
 7f4b337a6                 /usr/lib/x86_64-linux-gnu/libhcrypto.so.4.1.0
 7f4b339a6                 /usr/lib/x86_64-linux-gnu/libhcrypto.so.4.1.0
 7f4b339a7                 /usr/lib/x86_64-linux-gnu/libhcrypto.so.4.1.0
 7f4b339a8
 7f4b339a9                 /lib/x86_64-linux-gnu/libcom_err.so.2.1
 7f4b339ac                 /lib/x86_64-linux-gnu/libcom_err.so.2.1
 7f4b33bab                 /lib/x86_64-linux-gnu/libcom_err.so.2.1
 7f4b33bac                 /lib/x86_64-linux-gnu/libcom_err.so.2.1
 7f4b33bad                 /usr/lib/x86_64-linux-gnu/libasn1.so.8.0.0
 7f4b33c4c                 /usr/lib/x86_64-linux-gnu/libasn1.so.8.0.0
 7f4b33e4b                 /usr/lib/x86_64-linux-gnu/libasn1.so.8.0.0
 7f4b33e4c                 /usr/lib/x86_64-linux-gnu/libasn1.so.8.0.0
 7f4b33e4f                 /usr/lib/x86_64-linux-gnu/libkrb5.so.26.0.0
 7f4b33ed3                 /usr/lib/x86_64-linux-gnu/libkrb5.so.26.0.0
 7f4b340d2                 /usr/lib/x86_64-linux-gnu/libkrb5.so.26.0.0
 7f4b340d5                 /usr/lib/x86_64-linux-gnu/libkrb5.so.26.0.0
 7f4b340d8
 7f4b340d9                 /usr/lib/x86_64-linux-gnu/libheimntlm.so.0.1.0
 7f4b340e1                 /usr/lib/x86_64-linux-gnu/libheimntlm.so.0.1.0
 7f4b342e0                 /usr/lib/x86_64-linux-gnu/libheimntlm.so.0.1.0
 7f4b342e1                 /usr/lib/x86_64-linux-gnu/libheimntlm.so.0.1.0
 7f4b342e2                 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
 7f4b34405                 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
 7f4b34604                 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
 7f4b3460f                 /usr/lib/x86_64-linux-gnu/libgnutls.so.30.6.2
 7f4b34611
 7f4b34612                 /usr/lib/x86_64-linux-gnu/libgssapi.so.3.0.0
 7f4b3464f                 /usr/lib/x86_64-linux-gnu/libgssapi.so.3.0.0
 7f4b3484f                 /usr/lib/x86_64-linux-gnu/libgssapi.so.3.0.0
 7f4b34850                 /usr/lib/x86_64-linux-gnu/libgssapi.so.3.0.0
 7f4b34852
 7f4b34853                 /usr/lib/x86_64-linux-gnu/libsasl2.so.2.0.25
 7f4b3486c                 /usr/lib/x86_64-linux-gnu/libsasl2.so.2.0.25
 7f4b34a6c                 /usr/lib/x86_64-linux-gnu/libsasl2.so.2.0.25
 7f4b34a6d                 /usr/lib/x86_64-linux-gnu/libsasl2.so.2.0.25
 7f4b34a6e                 /lib/x86_64-linux-gnu/libresolv-2.23.so
 7f4b34a85                 /lib/x86_64-linux-gnu/libresolv-2.23.so
 7f4b34c85                 /lib/x86_64-linux-gnu/libresolv-2.23.so
 7f4b34c86                 /lib/x86_64-linux-gnu/libresolv-2.23.so
 7f4b34c87
 7f4b34c89                 /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2.10.5
 7f4b34cd6                 /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2.10.5
 7f4b34ed5                 /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2.10.5
 7f4b34ed7                 /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2.10.5
 7f4b34ed8
 7f4b34eda                 /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2.10.5
 7f4b34ee7                 /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2.10.5
 7f4b350e7                 /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2.10.5
 7f4b350e8                 /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2.10.5
 7f4b350e9                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/ldap.so
 7f4b350ed                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/ldap.so
 7f4b352ec                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/ldap.so
 7f4b352ed                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/ldap.so
 7f4b352ee                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/asq.so
 7f4b352f0                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/asq.so
 7f4b354ef                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/asq.so
 7f4b354f0                 /usr/lib/x86_64-linux-gnu/ldb/modules/ldb/asq.so
 7f4b354f1                 /usr/lib/x86_64-linux-gnu/libplds4.so
 7f4b354f4                 /usr/lib/x86_64-linux-gnu/libplds4.so
 7f4b356f3                 /usr/lib/x86_64-linux-gnu/libplds4.so
 7f4b356f4                 /usr/lib/x86_64-linux-gnu/libplds4.so
 7f4b356f5                 /usr/lib/x86_64-linux-gnu/libplc4.so
 7f4b356f9                 /usr/lib/x86_64-linux-gnu/libplc4.so
 7f4b358f8                 /usr/lib/x86_64-linux-gnu/libplc4.so
 7f4b358f9                 /usr/lib/x86_64-linux-gnu/libplc4.so
 7f4b358fa                 /usr/lib/x86_64-linux-gnu/libnssutil3.so
 7f4b35920                 /usr/lib/x86_64-linux-gnu/libnssutil3.so
 7f4b35b1f                 /usr/lib/x86_64-linux-gnu/libnssutil3.so
 7f4b35b26                 /usr/lib/x86_64-linux-gnu/libnssutil3.so
 7f4b35b27                 /usr/lib/x86_64-linux-gnu/libnspr4.so
 7f4b35b61                 /usr/lib/x86_64-linux-gnu/libnspr4.so
 7f4b35d61                 /usr/lib/x86_64-linux-gnu/libnspr4.so
 7f4b35d62                 /usr/lib/x86_64-linux-gnu/libnspr4.so
 7f4b35d63
 7f4b35d66                 /usr/lib/x86_64-linux-gnu/libnss3.so
 7f4b35ea5                 /usr/lib/x86_64-linux-gnu/libnss3.so
 7f4b360a5                 /usr/lib/x86_64-linux-gnu/libnss3.so
 7f4b360aa                 /usr/lib/x86_64-linux-gnu/libnss3.so
 7f4b360ac
 7f4b360ad                 /usr/lib/x86_64-linux-gnu/libbasicobjects.so.0.1.0
 7f4b360ae                 /usr/lib/x86_64-linux-gnu/libbasicobjects.so.0.1.0
 7f4b362ae                 /usr/lib/x86_64-linux-gnu/libbasicobjects.so.0.1.0
 7f4b362af                 /usr/lib/x86_64-linux-gnu/libbasicobjects.so.0.1.0
 7f4b362b0                 /usr/lib/x86_64-linux-gnu/libref_array.so.1.2.1
 7f4b362b2                 /usr/lib/x86_64-linux-gnu/libref_array.so.1.2.1
 7f4b364b1                 /usr/lib/x86_64-linux-gnu/libref_array.so.1.2.1
 7f4b364b2                 /usr/lib/x86_64-linux-gnu/libref_array.so.1.2.1
 7f4b364b3                 /usr/lib/x86_64-linux-gnu/libpath_utils.so.1.0.1
 7f4b364b6                 /usr/lib/x86_64-linux-gnu/libpath_utils.so.1.0.1
 7f4b366b5                 /usr/lib/x86_64-linux-gnu/libpath_utils.so.1.0.1
 7f4b366b6                 /usr/lib/x86_64-linux-gnu/libpath_utils.so.1.0.1
 7f4b366b7                 /usr/lib/x86_64-linux-gnu/libcollection.so.4.1.0
 7f4b366c2                 /usr/lib/x86_64-linux-gnu/libcollection.so.4.1.0
 7f4b368c1                 /usr/lib/x86_64-linux-gnu/libcollection.so.4.1.0
 7f4b368c2                 /usr/lib/x86_64-linux-gnu/libcollection.so.4.1.0
 7f4b368c3                 /lib/x86_64-linux-gnu/libgpg-error.so.0.17.0
 7f4b368d5                 /lib/x86_64-linux-gnu/libgpg-error.so.0.17.0
 7f4b36ad5                 /lib/x86_64-linux-gnu/libgpg-error.so.0.17.0
 7f4b36ad6                 /lib/x86_64-linux-gnu/libgpg-error.so.0.17.0
 7f4b36ad7                 /usr/lib/x86_64-linux-gnu/sssd/libsss_cert.so
 7f4b36ada                 /usr/lib/x86_64-linux-gnu/sssd/libsss_cert.so
 7f4b36cd9                 /usr/lib/x86_64-linux-gnu/sssd/libsss_cert.so
 7f4b36cda                 /usr/lib/x86_64-linux-gnu/sssd/libsss_cert.so
 7f4b36cdb                 /usr/lib/x86_64-linux-gnu/sssd/libsss_crypt.so
 7f4b36ce0                 /usr/lib/x86_64-linux-gnu/sssd/libsss_crypt.so
 7f4b36edf                 /usr/lib/x86_64-linux-gnu/sssd/libsss_crypt.so
 7f4b36ee0                 /usr/lib/x86_64-linux-gnu/sssd/libsss_crypt.so
 7f4b36ee1                 /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.2
 7f4b36ff0                 /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.2
 7f4b371ef                 /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.2
 7f4b371f0                 /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.2
 7f4b371f1
 7f4b371f2                 /usr/lib/x86_64-linux-gnu/libdhash.so.1.0.2
 7f4b371f5                 /usr/lib/x86_64-linux-gnu/libdhash.so.1.0.2
 7f4b373f4                 /usr/lib/x86_64-linux-gnu/libdhash.so.1.0.2
 7f4b373f5                 /usr/lib/x86_64-linux-gnu/libdhash.so.1.0.2
 7f4b373f6                 /usr/lib/x86_64-linux-gnu/libini_config.so.5.1.0
 7f4b3740c                 /usr/lib/x86_64-linux-gnu/libini_config.so.5.1.0
 7f4b3760b                 /usr/lib/x86_64-linux-gnu/libini_config.so.5.1.0
 7f4b3760c                 /usr/lib/x86_64-linux-gnu/libini_config.so.5.1.0
 7f4b3760d                 /lib/x86_64-linux-gnu/libpcre.so.3.13.2
 7f4b3767b                 /lib/x86_64-linux-gnu/libpcre.so.3.13.2
 7f4b3787b                 /lib/x86_64-linux-gnu/libpcre.so.3.13.2
 7f4b3787c                 /lib/x86_64-linux-gnu/libpcre.so.3.13.2
 7f4b3787d                 /lib/x86_64-linux-gnu/libgcrypt.so.20.0.5
 7f4b37954                 /lib/x86_64-linux-gnu/libgcrypt.so.20.0.5
 7f4b37b54                 /lib/x86_64-linux-gnu/libgcrypt.so.20.0.5
 7f4b37b55                 /lib/x86_64-linux-gnu/libgcrypt.so.20.0.5
 7f4b37b5d
 7f4b37b5e                 /lib/x86_64-linux-gnu/liblzma.so.5.0.0
 7f4b37b7f                 /lib/x86_64-linux-gnu/liblzma.so.5.0.0
 7f4b37d7e                 /lib/x86_64-linux-gnu/liblzma.so.5.0.0
 7f4b37d7f                 /lib/x86_64-linux-gnu/liblzma.so.5.0.0
 7f4b37d80                 /lib/x86_64-linux-gnu/librt-2.23.so
 7f4b37d87                 /lib/x86_64-linux-gnu/librt-2.23.so
 7f4b37f86                 /lib/x86_64-linux-gnu/librt-2.23.so
 7f4b37f87                 /lib/x86_64-linux-gnu/librt-2.23.so
 7f4b37f88                 /lib/x86_64-linux-gnu/libselinux.so.1
 7f4b37fa7                 /lib/x86_64-linux-gnu/libselinux.so.1
 7f4b381a6                 /lib/x86_64-linux-gnu/libselinux.so.1
 7f4b381a7                 /lib/x86_64-linux-gnu/libselinux.so.1
 7f4b381a8
 7f4b381aa                 /lib/x86_64-linux-gnu/libm-2.23.so
 7f4b382b2                 /lib/x86_64-linux-gnu/libm-2.23.so
 7f4b384b1                 /lib/x86_64-linux-gnu/libm-2.23.so
 7f4b384b2                 /lib/x86_64-linux-gnu/libm-2.23.so
 7f4b384b3                 /lib/x86_64-linux-gnu/libdl-2.23.so
 7f4b384b6                 /lib/x86_64-linux-gnu/libdl-2.23.so
 7f4b386b5                 /lib/x86_64-linux-gnu/libdl-2.23.so
 7f4b386b6                 /lib/x86_64-linux-gnu/libdl-2.23.so
 7f4b386b7                 /lib/x86_64-linux-gnu/libpthread-2.23.so
 7f4b386cf                 /lib/x86_64-linux-gnu/libpthread-2.23.so
 7f4b388ce                 /lib/x86_64-linux-gnu/libpthread-2.23.so
 7f4b388cf                 /lib/x86_64-linux-gnu/libpthread-2.23.so
 7f4b388d0
 7f4b388d4                 /lib/x86_64-linux-gnu/libc-2.23.so
 7f4b38a94                 /lib/x86_64-linux-gnu/libc-2.23.so
 7f4b38c94                 /lib/x86_64-linux-gnu/libc-2.23.so
 7f4b38c98                 /lib/x86_64-linux-gnu/libc-2.23.so
 7f4b38c9a
 7f4b38c9e                 /usr/lib/x86_64-linux-gnu/sssd/libsss_child.so
 7f4b38ca3                 /usr/lib/x86_64-linux-gnu/sssd/libsss_child.so
 7f4b38ea2                 /usr/lib/x86_64-linux-gnu/sssd/libsss_child.so
 7f4b38ea3                 /usr/lib/x86_64-linux-gnu/sssd/libsss_child.so
 7f4b38ea4                 /usr/lib/x86_64-linux-gnu/sssd/libsss_debug.so
 7f4b38ea7                 /usr/lib/x86_64-linux-gnu/sssd/libsss_debug.so
 7f4b390a7                 /usr/lib/x86_64-linux-gnu/sssd/libsss_debug.so
 7f4b390a8                 /usr/lib/x86_64-linux-gnu/sssd/libsss_debug.so
 7f4b390a9                 /usr/lib/x86_64-linux-gnu/sssd/libsss_util.so
 7f4b39115                 /usr/lib/x86_64-linux-gnu/sssd/libsss_util.so
 7f4b39314                 /usr/lib/x86_64-linux-gnu/sssd/libsss_util.so
 7f4b39315                 /usr/lib/x86_64-linux-gnu/sssd/libsss_util.so
 7f4b39317                 /lib/x86_64-linux-gnu/libkeyutils.so.1.5
 7f4b3931a                 /lib/x86_64-linux-gnu/libkeyutils.so.1.5
 7f4b39519                 /lib/x86_64-linux-gnu/libkeyutils.so.1.5
 7f4b3951a                 /lib/x86_64-linux-gnu/libkeyutils.so.1.5
 7f4b3951b                 /lib/x86_64-linux-gnu/libnl-3.so.200.22.0
 7f4b39538                 /lib/x86_64-linux-gnu/libnl-3.so.200.22.0
 7f4b39737                 /lib/x86_64-linux-gnu/libnl-3.so.200.22.0
 7f4b39739                 /lib/x86_64-linux-gnu/libnl-3.so.200.22.0
 7f4b3973a                 /usr/lib/x86_64-linux-gnu/libnl-route-3.so.200.22.0
 7f4b39795                 /usr/lib/x86_64-linux-gnu/libnl-route-3.so.200.22.0
 7f4b39994                 /usr/lib/x86_64-linux-gnu/libnl-route-3.so.200.22.0
 7f4b39997                 /usr/lib/x86_64-linux-gnu/libnl-route-3.so.200.22.0
 7f4b3999b
 7f4b3999d                 /lib/x86_64-linux-gnu/libdbus-1.so.3.14.6
 7f4b399e8                 /lib/x86_64-linux-gnu/libdbus-1.so.3.14.6
 7f4b39be7                 /lib/x86_64-linux-gnu/libdbus-1.so.3.14.6
 7f4b39be8                 /lib/x86_64-linux-gnu/libdbus-1.so.3.14.6
 7f4b39be9                 /usr/lib/x86_64-linux-gnu/libldb.so.1.1.24
 7f4b39c15                 /usr/lib/x86_64-linux-gnu/libldb.so.1.1.24
 7f4b39e14                 /usr/lib/x86_64-linux-gnu/libldb.so.1.1.24
 7f4b39e15                 /usr/lib/x86_64-linux-gnu/libldb.so.1.1.24
 7f4b39e16                 /lib/x86_64-linux-gnu/libpopt.so.0.0.0
 7f4b39e21                 /lib/x86_64-linux-gnu/libpopt.so.0.0.0
 7f4b3a020                 /lib/x86_64-linux-gnu/libpopt.so.0.0.0
 7f4b3a021                 /lib/x86_64-linux-gnu/libpopt.so.0.0.0
 7f4b3a022                 /usr/lib/x86_64-linux-gnu/libtalloc.so.2.1.5
 7f4b3a035                 /usr/lib/x86_64-linux-gnu/libtalloc.so.2.1.5
 7f4b3a234                 /usr/lib/x86_64-linux-gnu/libtalloc.so.2.1.5
 7f4b3a235                 /usr/lib/x86_64-linux-gnu/libtalloc.so.2.1.5
 7f4b3a236                 /usr/lib/x86_64-linux-gnu/libtevent.so.0.9.28
 7f4b3a243                 /usr/lib/x86_64-linux-gnu/libtevent.so.0.9.28
 7f4b3a443                 /usr/lib/x86_64-linux-gnu/libtevent.so.0.9.28
 7f4b3a444                 /usr/lib/x86_64-linux-gnu/libtevent.so.0.9.28
 7f4b3a445                 /lib/x86_64-linux-gnu/ld-2.23.so
 7f4b3a47c                 /var/lib/sss/db/config.ldb
 7f4b3a5b6
 7f4b3a5c6                 /lib/x86_64-linux-gnu/libsystemd.so.0.14.0
 7f4b3a646                 /lib/x86_64-linux-gnu/libsystemd.so.0.14.0
 7f4b3a649                 /lib/x86_64-linux-gnu/libsystemd.so.0.14.0
 7f4b3a64a
 7f4b3a663                 /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache
 7f4b3a66a                 /lib/x86_64-linux-gnu/ld-2.23.so
 7f4b3a66b                 /lib/x86_64-linux-gnu/ld-2.23.so
 7f4b3a66c
 7ffc5f1c3                 [stack]
 7ffc5f1f7                 [vvar]
 7ffc5f1f9                 [vdso]
 fffffffff                 [vsyscall]
ProcStatus:
 Name:	sssd
 State:	S (sleeping)
 Tgid:	1393
 Ngid:	0
 Pid:	1393
 PPid:	1
 TracerPid:	0
 Uid:	0	0	0	0
 Gid:	0	0	0	0
 FDSize:	64
 Groups:	
 NStgid:	1393
 NSpid:	1393
 NSpgid:	1393
 NSsid:	1393
 VmPeak:	  194120 kB
 VmSize:	  194120 kB
 VmLck:	       0 kB
 VmPin:	       0 kB
 VmHWM:	   10328 kB
 VmRSS:	    1476 kB
 VmData:	     912 kB
 VmStk:	     132 kB
 VmExe:	      72 kB
 VmLib:	   16828 kB
 VmPTE:	     364 kB
 VmPMD:	      12 kB
 VmSwap:	    1272 kB
 HugetlbPages:	       0 kB
 Threads:	1
 SigQ:	3/515136
 SigPnd:	0000000000000000
 ShdPnd:	0000000000000000
 SigBlk:	0000000000001080
 SigIgn:	0000000000101000
 SigCgt:	0000000180014a03
 CapInh:	0000000000000000
 CapPrm:	0000003fffffffff
 CapEff:	0000003fffffffff
 CapBnd:	0000003fffffffff
 CapAmb:	0000000000000000
 Seccomp:	0
 Speculation_Store_Bypass:	thread vulnerable
 Cpus_allowed:	ffffffff
 Cpus_allowed_list:	0-31
 Mems_allowed:	00000000,00000003
 Mems_allowed_list:	0-1
 voluntary_ctxt_switches:	1247041
 nonvoluntary_ctxt_switches:	23669
Signal: 6
Uname: Linux 4.4.0-171-generic x86_64

Also found,

root@gamma02:/var/log/sssd# cat sssd.log
(Wed Jun 17 08:57:13 2020) [sssd] [talloc_log_fn] (0x0010): Bad talloc magic value - unknown value

Jun 17 08:57:23 gamma02 sssd: Killing service [MyOrg], not responding to pings!
Jun 17 09:01:16 gamma02 nhc[21207]: Health check failed:  Script timed out while executing "check_ps_service -u root -S sshd".
Jun 17 09:01:17 gamma02 nhc[21213]: Health check failed:  Terminated by signal SIGTERM.
Jun 17 09:01:19 gamma02 nhc[21225]: Health check failed:  Watchdog timer unable to terminate hung NHC process 21157.
Jun 17 09:01:34 gamma02 systemd[1]: sssd.service: Main process exited, code=dumped, status=6/ABRT
Jun 17 09:01:35 gamma02 sssd[nss]: Shutting down
Jun 17 09:01:36 gamma02 sssd[pam]: Shutting down
Jun 17 09:01:45 gamma02 systemd[1]: sssd.service: Unit entered failed state.
Jun 17 09:01:45 gamma02 systemd[1]: sssd.service: Failed with result 'core-dump'.
Jun 17 09:01:49 gamma02 smtpd[1765]: smtp-out: session bba072ee6e63c581: connection closed, 1 message sent.
Jun 17 09:03:45 gamma02 kernel: [5179931.201783] ptrace of pid 15866 was attempted by: gdb (pid 21396)
root@gamma02:/var/log# cat apport.log
ERROR: apport (pid 21002) Wed Jun 17 09:00:54 2020: called for pid 1393, signal 6, core limit 0, dump mode 1
ERROR: apport (pid 21002) Wed Jun 17 09:00:55 2020: executable: /usr/sbin/sssd (command line "/usr/sbin/sssd -i -f")
ERROR: apport (pid 21002) Wed Jun 17 09:00:55 2020: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment
ERROR: apport (pid 21002) Wed Jun 17 09:01:35 2020: wrote report /var/crash/_usr_sbin_sssd.0.crash

Can you confirm your system is not generally out of memory ?

Please check the /var/log/syslog if OOM killer is killing processes.

Regards
Peasant.

No OOM killer found in logs