Incorrect `null` handling in `if` conditions and elsewhere

[chrisberkhout]

The problem

In the Painless scripting language it is an error for the result of an if condition to be null. This matches Java but differs from many other languages, in which null is falsy.

The null safe operator ?. is often used to attempt field access or method invocation on objects that may be null, but it doesn't turn nulls in to non-nulls.

After discovering incorrect null handling in my own code, I checked elsewhere and found many other occurrences.

Demonstration of the problem in an if statement

POST _scripts/painless/_execute
{
  "script": {
    "params": {
      "condition": null
    },
    "source": """
      if (params?.condition) {
        return "it was true";
      } else {
        return "it was false";
      }
    """
  }
}

Demonstration of the problem in an if processor option

PUT _ingest/pipeline/my-pipeline
{
  "processors": [
    {
      "set": {
        "field": "testfield",
        "value": "it was true",
        "if": "ctx?.condition"
      }
    }
  ]
}

POST _ingest/pipeline/my-pipeline/_simulate
{
  "docs": [
    {
      "_source": {
        "condition": null
      }
    }
  ]
}

Identified cases

In 3431bbe I looked for lines with an if condition, the null safe operator, and without an equality or instanceof check:

ag -G '\.(yml|hbs)' 'if.*\?\.' | grep -v '==' | grep -v '!=' | grep -v instanceof

And also for lines with a for loop and the null safe operator:

ag -G '\.(yml|hbs)' 'for ?\(.*\?\.'

About half of the candidates were actual problems: 225 lines spread across 39 integrations.

Summary of identified cases

     37 lastpass
     36 nagios_xi
     16 cisco_ise
     13 zeek
     13 cisco_secure_endpoint
     12 ping_one
      9 zoom
      8 panw_cortex_xdr
      7 juniper_srx
      7 aws
      5 hid_bravura_monitor
      5 cisco_nexus
      4 trendmicro
      4 proofpoint_tap
      4 github
      4 box_events
      4 atlassian_jira
      4 atlassian_confluence
      3 jamf_compliance_reporter
      3 infoblox_nios
      2 tenable_sc
      2 pfsense
      2 mimecast
      2 fortinet_fortigate
      2 cloudflare_logpush
      2 cloudflare
      2 cisco_asa
      2 atlassian_bitbucket
      1 vectra_detect
      1 ti_cif3
      1 suricata
      1 salesforce
      1 microsoft_defender_endpoint
      1 mattermost
      1 elasticsearch
      1 elastic_package_registry
      1 cyberarkpas
      1 cisco_meraki
      1 cisco_ftd

    225 TOTAL

List of identified cases

packages/atlassian_bitbucket/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:376:          for (def j = 0; j < ctx.bitbucket?.audit?.affected_objects.length; j++) {
packages/atlassian_bitbucket/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:396:          for (def j = 0; j < ctx.bitbucket?.audit?.changed_values.length; j++) {
packages/atlassian_confluence/data_stream/audit/elasticsearch/ingest_pipeline/cloud.yml:59:            for (def j = 0; j < ctx.confluence?.audit?.affected_objects.length; j++) {
packages/atlassian_confluence/data_stream/audit/elasticsearch/ingest_pipeline/cloud.yml:67:            for (def j = 0; j < ctx.confluence?.audit?.changed_values.length; j++) {
packages/atlassian_confluence/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:296:          for (def j = 0; j < ctx.confluence?.audit?.affected_objects.length; j++) {
packages/atlassian_confluence/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:345:          for (def j = 0; j < ctx.confluence?.audit?.changed_values.length; j++) {
packages/atlassian_jira/data_stream/audit/elasticsearch/ingest_pipeline/cloud.yml:54:            for (def j = 0; j < ctx.jira?.audit?.affected_objects.length; j++) {
packages/atlassian_jira/data_stream/audit/elasticsearch/ingest_pipeline/cloud.yml:62:            for (def j = 0; j < ctx.jira?.audit?.changed_values.length; j++) {
packages/atlassian_jira/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:308:          for (def j = 0; j < ctx.jira?.audit?.affected_objects.length; j++) {
packages/atlassian_jira/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:327:          for (def j = 0; j < ctx.jira?.audit?.changed_values.length; j++) {
packages/aws/data_stream/cloudfront_logs/elasticsearch/ingest_pipeline/default.yml:168:      if: ctx.http?.response?.status_code >= 400
packages/aws/data_stream/cloudfront_logs/elasticsearch/ingest_pipeline/default.yml:172:      if: ctx.http?.response?.status_code < 400 && ctx.http?.response?.status_code > 000
packages/aws/data_stream/route53_public_logs/elasticsearch/ingest_pipeline/default.yml:56:      if: '!ctx._tmp?.question.endsWith("in-addr.arpa")'
packages/aws/data_stream/route53_resolver_logs/elasticsearch/ingest_pipeline/default.yml:228:      if(ctx.dns?.question?.name.contains(".in-addr.arpa")) {
packages/aws/data_stream/route53_resolver_logs/elasticsearch/ingest_pipeline/default.yml:235:      } else if (ctx.dns?.question?.name.contains(".ip6.arpa")) {
packages/aws/data_stream/route53_resolver_logs/elasticsearch/ingest_pipeline/default.yml:60:    if: '!ctx.json?.query_name.endsWith("in-addr.arpa") && !ctx.json?.query_name.endsWith("ip6.arpa")'
packages/aws/data_stream/vpcflow/elasticsearch/ingest_pipeline/default.yml:28:      if: 'ctx.event?.original.startsWith("version") || ctx.event?.original.startsWith("instance-id")'
packages/box_events/data_stream/events/elasticsearch/ingest_pipeline/default.yml:708:        if (ctx.event?.action.equals("SHIELD_ALERT")) {
packages/box_events/data_stream/events/elasticsearch/ingest_pipeline/default.yml:742:        for (session in ctx.box.additional_details?.shield_alert?.alert_summary?.sessions) {
packages/box_events/data_stream/events/elasticsearch/ingest_pipeline/default.yml:743:          if (session.session_type?.equals("suspicious")) {
packages/box_events/data_stream/events/elasticsearch/ingest_pipeline/default.yml:786:        for (alert_activity in ctx.box.additional_details?.shield_alert?.alert_summary?.alert_activities) {
packages/cisco_asa/data_stream/log/elasticsearch/ingest_pipeline/default.yml:2483:          } else if (ctx?.event?.action.startsWith('connection-')) {
packages/cisco_asa/data_stream/log/elasticsearch/ingest_pipeline/default.yml:2502:        } else if (ctx?.event?.action.startsWith('connection-')) {
packages/cisco_ftd/data_stream/log/elasticsearch/ingest_pipeline/default.yml:2117:      if: "ctx?.tags?.contains('private_is_internal') &&
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_ad_connector.yml:13:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_administrative_and_operational_audit.yml:13:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_authentication_flow_diagnostics.yml:16:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_failed_attempts.yml:13:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_guest.yml:19:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_identity_stores_diagnostics.yml:13:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_internal_operations_diagnostics.yml:16:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_mydevices.yml:19:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_passed_authentications.yml:13:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_policy_diagnostics.yml:19:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_posture_and_client_provisioning_audit.yml:19:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_radius_accounting.yml:19:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_radius_diagnostics.yml:14:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_system_statistics.yml:19:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_tacacs_accounting.yml:19:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_ise/data_stream/log/elasticsearch/ingest_pipeline/pipeline_threat_centric_nac.yml:16:      if: ctx.cisco_ise?.log?.segment?.number > 0
packages/cisco_meraki/data_stream/log/elasticsearch/ingest_pipeline/events.yml:44:    if: ctx?.msgtype.startsWith("type=")
packages/cisco_nexus/data_stream/log/elasticsearch/ingest_pipeline/pipeline_extract_message.yml:19:      if: "['VSHD_SYSLOG_CONFIG_I','DETECT_MULTIPLE_PEERS','UPDOWN','CFGWRITE_STARTED','LINEPROTO'].contains(ctx.event?.code.toUpperCase())"
packages/cisco_nexus/data_stream/log/elasticsearch/ingest_pipeline/pipeline_extract_message.yml:30:      if: "['SYSTEM_MSG'].contains(ctx.event?.code.toUpperCase())"
packages/cisco_nexus/data_stream/log/elasticsearch/ingest_pipeline/pipeline_extract_message.yml:41:      if: "['INVAL_IP','L2FM_MAC_MOVE2','DUPLEX_MISMATCH','NATIVE_VLAN_MISMATCH','THRESHOLD_VIOLATION'].contains(ctx.event?.code.toUpperCase())"
packages/cisco_nexus/data_stream/log/elasticsearch/ingest_pipeline/pipeline_extract_message.yml:51:      if: "['LOGIN_SUCCESS','LOGOUT','LOGOUT_C6K'].contains(ctx.event?.code.toUpperCase())"
packages/cisco_nexus/data_stream/log/elasticsearch/ingest_pipeline/pipeline_extract_message.yml:6:      if: "['IF_DOWN_ADMIN_DOWN','IF_ADMIN_UP','SPEED','IF_DUPLEX','IF_RX_FLOW_CONTROL','IF_TX_FLOW_CONTROL','IF_UP','IF_XCVR_WARNING'].contains(ctx.event?.code.toUpperCase())"
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:135:        for (technique in ctx?.cisco?.secure_endpoint?.techniques) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:137:                if (!ctx?.threat.technique.name.contains(technique.name)) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:142:                if (!ctx?.threat.technique.id.contains(technique.external_id)) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:147:                if (!ctx?.threat.technique.reference.contains(technique.mitre_url)) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:171:        for (tactic in ctx?.cisco?.secure_endpoint?.tactics) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:173:                if (!ctx?.threat.tactic.name.contains(tactic.name)) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:178:                if (!ctx?.threat.tactic.id.contains(tactic.external_id)) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:183:                if (!ctx?.threat.tactic.reference.contains(tactic.mitre_url)) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:217:        if (nameArray?.length > 0) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:529:        for (addr in ctx?.cisco?.secure_endpoint?.computer?.network_addresses) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:531:                if (!ctx?.related?.ip.contains(addr.ip)) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:546:        for (addr in ctx?.cisco?.secure_endpoint?.computer?.network_addresses) {
packages/cisco_secure_endpoint/data_stream/event/elasticsearch/ingest_pipeline/default.yml:548:                if (!ctx?.cisco?.secure_endpoint?.related?.mac.contains(addr.mac)) {
packages/cloudflare/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:40:      if: ctx.json?.action?.result
packages/cloudflare/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:44:      if: "!ctx.json?.action?.result"
packages/cloudflare_logpush/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:76:      if: ctx.json?.ActionResult
packages/cloudflare_logpush/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:80:      if: '!ctx.json?.ActionResult'
packages/cyberarkpas/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:351:      if: 'ctx.event?.severity > 6'
packages/elastic_package_registry/data_stream/metrics/elasticsearch/ingest_pipeline/default.yml:76:      if: ctx?.package_registry?.containsKey("start_time_seconds")
packages/elasticsearch/data_stream/audit/elasticsearch/ingest_pipeline/pipeline-json.yml:13:      if: '!ctx.elasticsearch.audit.containsKey("type") && !["rest", "transport", "ip_filter", "security_config_change"].contains(ctx.elasticsearch?.audit?.event?.type)'
packages/fortinet_fortigate/data_stream/log/elasticsearch/ingest_pipeline/default.yml:68:        for (def i = 0; i < arr?.length; i++) {
packages/fortinet_fortigate/data_stream/log/elasticsearch/ingest_pipeline/event.yml:203:      if: ctx.rule?.description.startsWith('Dynamic address updated')
packages/github/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:107:      if: ctx.event?.action.startsWith("org.")
packages/github/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:191:      if: 'ctx._temp?.action.contains("create") || ctx._temp?.action.contains("add")'
packages/github/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:195:      if: 'ctx._temp?.action.contains("delete") || ctx._temp?.action.contains("remove")'
packages/github/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:97:      if: ctx.event?.action.startsWith("team.")
packages/hid_bravura_monitor/data_stream/log/elasticsearch/ingest_pipeline/default.yml:27:      if: ctx?.msg.contains('last message repeated')
packages/hid_bravura_monitor/data_stream/log/elasticsearch/ingest_pipeline/default.yml:37:      if: ctx?.log?.level.contains('Perf')
packages/hid_bravura_monitor/data_stream/log/elasticsearch/ingest_pipeline/default.yml:42:      if: ctx?.log?.level.contains('Perf')
packages/hid_bravura_monitor/data_stream/log/elasticsearch/ingest_pipeline/default.yml:45:      if: ctx?.log?.level.contains('Perf')
packages/hid_bravura_monitor/data_stream/log/elasticsearch/ingest_pipeline/default.yml:61:      if: ctx?.log?.level.contains('Perf')
packages/infoblox_nios/data_stream/log/elasticsearch/ingest_pipeline/pipeline_dns.yml:115:        for(data in ctx.dns?.answers?.data){
packages/infoblox_nios/data_stream/log/elasticsearch/ingest_pipeline/pipeline_dns.yml:132:        for(name in ctx.dns?.answers?.name){
packages/infoblox_nios/data_stream/log/elasticsearch/ingest_pipeline/pipeline_dns.yml:90:        for (def i = 0; i < arr?.length; i++) {
packages/jamf_compliance_reporter/data_stream/log/elasticsearch/ingest_pipeline/pipeline_aue_execve.yml:137:        for (Map.Entry m : ctx.json?.args.entrySet()) {
packages/jamf_compliance_reporter/data_stream/log/elasticsearch/ingest_pipeline/pipeline_aue_posix_spawn.yml:43:        for (Map.Entry m : ctx.json?.args.entrySet()) {
packages/jamf_compliance_reporter/data_stream/log/elasticsearch/ingest_pipeline/pipeline_prohibited_app_blocked.yml:266:        for (Map.Entry m : ctx.json?.args.entrySet()) {
packages/juniper_srx/data_stream/log/elasticsearch/ingest_pipeline/flow.yml:29:    if: "ctx.juniper?.srx?.tag.endsWith('CREATE') || ctx.juniper?.srx?.tag.endsWith('UPDATE') || ctx.juniper?.srx?.tag.endsWith('CREATE_LS') || ctx.juniper?.srx?.tag.endsWith('UPDATE_LS')"
packages/juniper_srx/data_stream/log/elasticsearch/ingest_pipeline/flow.yml:36:    if: "ctx.juniper?.srx?.tag.endsWith('CLOSE') || ctx.juniper?.srx?.tag.endsWith('CLOSE_LS')"
packages/juniper_srx/data_stream/log/elasticsearch/ingest_pipeline/flow.yml:42:    if: "ctx.juniper?.srx?.tag.endsWith('DENY') || ctx.juniper?.srx?.tag.endsWith('DENY_LS')"
packages/juniper_srx/data_stream/log/elasticsearch/ingest_pipeline/flow.yml:46:    if: "ctx.juniper?.srx?.tag.endsWith('CREATE') || ctx.juniper?.srx?.tag.endsWith('UPDATE') || ctx.juniper?.srx?.tag.endsWith('CREATE_LS') || ctx.juniper?.srx?.tag.endsWith('UPDATE_LS')"
packages/juniper_srx/data_stream/log/elasticsearch/ingest_pipeline/flow.yml:50:    if: "ctx.juniper?.srx?.tag.endsWith('CLOSE') || ctx.juniper?.srx?.tag.endsWith('CLOSE_LS')"
packages/juniper_srx/data_stream/log/elasticsearch/ingest_pipeline/flow.yml:54:    if: "ctx.juniper?.srx?.tag.endsWith('DENY') || ctx.juniper?.srx?.tag.endsWith('DENY_LS')"
packages/juniper_srx/data_stream/log/elasticsearch/ingest_pipeline/ids.yml:73:    if: "ctx.juniper?.srx?.attack_name.startsWith('Tunnel')"
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:146:      if: ctx.event?.action?.contains('deleted sites')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:152:      if: ctx.event?.action?.contains('employee invited') || ctx.event?.action?.contains('employee account created') || ctx.event?.action?.contains('employee account deleted')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:161:          if (ctx.event?.action?.contains('limit shared folder')) {
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:168:      if: ctx.event?.action?.contains('log in')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:174:      if: ctx.event?.action?.contains('saml login')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:180:      if: ctx.event?.action?.contains('failed login attempt')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:186:      if: ctx.event?.action?.contains('login to admin console') || ctx.event?.action?.contains('make admin') || ctx.event?.action?.contains('remove admin') || ctx.event?.action?.contains('require password change') || ctx.event?.action?.contains('master password reset by super admin')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:192:      if: ctx.event?.action?.contains('site added')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:198:      if: ctx.event?.action?.contains('created shared folder') || ctx.event?.action?.contains('deleted shared folder')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:204:      if: ctx.event?.action?.contains('add secure note') || ctx.event?.action?.contains('open secure note')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:211:      if: ctx.event?.action?.contains('edit secure note')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:217:      if: ctx.event?.action?.contains('add to shared folder')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:223:      if: ctx.event?.action?.contains('create group')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:229:      if: ctx.event?.action?.contains('adding user to group')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:235:      if: ctx.event?.action?.contains('created lastpass account')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:241:      if: ctx.event?.action?.contains('update folder permissions')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:247:      if: ctx.event?.action?.contains('renamed shared folder')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:253:      if: ctx.event?.action?.contains('move to shared folder')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:260:      if: ctx.event?.action?.contains('move from shared folder')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:268:      if: ctx.event?.action?.contains('delete shared sites')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:275:      if: ctx.event?.action?.contains('limit shared folder')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:281:      if: ctx.event?.action?.contains('removed from shared folder')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:290:      if: ctx.event?.action?.contains('employee invited') || ctx.event?.action?.contains('employee account created') || ctx.event?.action?.contains('employee account deleted')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:301:      if: "!(ctx.event?.action?.contains('employee invited') || ctx.event?.action?.contains('employee account created') || ctx.event?.action?.contains('employee account deleted'))"
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:40:      if: ctx.event?.action?.contains('login verification email sent') || ctx.event?.action?.contains('log in') || ctx.event?.action?.contains('login to admin console') || ctx.event?.action?.contains('saml login') || ctx.event?.action?.contains('multifactor enabled') || ctx.event?.action?.contains('failed login attempt')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:44:      if: ctx.event?.action?.contains('add policy') || ctx.event?.action?.contains('delete policy') || ctx.event?.action?.contains('enterprise api secret regenerated')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:48:      if: ctx.event?.action?.contains('make admin') || ctx.event?.action?.contains('master password changed') || ctx.event?.action?.contains('master password reset by super admin') || ctx.event?.action?.contains('require password change') || ctx.event?.action?.contains('employee account created') || ctx.event?.action?.contains('created lastpass account') || ctx.event?.action?.contains('employee account deleted') || ctx.event?.action?.contains('remove admin') || ctx.event?.action?.contains('create group') || ctx.event?.action?.contains('adding user to group')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:52:      if: ctx.event?.action?.contains('log in') || ctx.event?.action?.contains('login to admin console') || ctx.event?.action?.contains('saml login') || ctx.event?.action?.contains('open secure note') || ctx.event?.action?.contains('failed login attempt')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:56:      if: ctx.event?.action?.contains('make admin')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:60:      if: ctx.event?.action?.contains('enterprise api secret regenerated') || ctx.event?.action?.contains('update folder permissions') || ctx.event?.action?.contains('master password changed') || ctx.event?.action?.contains('master password reset by super admin') || ctx.event?.action?.contains('edit secure note') || ctx.event?.action?.contains('renamed shared folder') || ctx.event?.action?.contains('move to shared folder') || ctx.event?.action?.contains('move from shared folder') || ctx.event?.action?.contains('limit shared folder') || ctx.event?.action?.contains('update folder permissions')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:64:      if: ctx.event?.action?.contains('employee account created') || ctx.event?.action?.contains('created lastpass account') || ctx.event?.action?.contains('created shared folder') || ctx.event?.action?.contains('add secure note') || ctx.event?.action?.contains('site added') || ctx.event?.action?.contains('add to shared folder') || ctx.event?.action?.contains('add policy')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:68:      if: ctx.event?.action?.contains('deleted sites') || ctx.event?.action?.contains('delete policy') || ctx.event?.action?.contains('deleted shared folder') || ctx.event?.action?.contains('employee account deleted') || ctx.event?.action?.contains('remove admin') || ctx.event?.action?.contains('removed from shared folder') || ctx.event?.action?.contains('delete shared sites') || ctx.event?.action?.contains('deleted sites')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:72:      if: ctx.event?.action?.contains('create group') || ctx.event?.action?.contains('adding user to group')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:76:      if: ctx.event?.action?.contains('login verification email sent') || ctx.event?.action?.contains('get shared folder data') || ctx.event?.action?.contains('get user data') || ctx.event?.action?.contains('employee invited') || ctx.event?.action?.contains('reporting') || ctx.event?.action?.contains('require password change') || ctx.event?.action?.contains('multifactor enabled')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:80:      if: ctx.event?.action?.contains('login verification email sent') || ctx.event?.action?.contains('log in') || ctx.event?.action?.contains('login to admin console') || ctx.event?.action?.contains('saml login') || ctx.event?.action?.contains('open secure note') || ctx.event?.action?.contains('make admin') || ctx.event?.action?.contains('enterprise api secret regenerated') || ctx.event?.action?.contains('update folder permissions') || ctx.event?.action?.contains('master password changed') || ctx.event?.action?.contains('master password reset by super admin') || ctx.event?.action?.contains('employee account created') || ctx.event?.action?.contains('created lastpass account') || ctx.event?.action?.contains('created shared folder') || ctx.event?.action?.contains('add secure note') || ctx.event?.action?.contains('site added') || ctx.event?.action?.contains('add to shared folder') || ctx.event?.action?.contains('add policy') || ctx.event?.action?.contains('deleted sites') || ctx.event?.action?.contains('delete policy') || ctx.event?.action?.contains('deleted shared folder') || ctx.event?.action?.contains('employee account deleted') || ctx.event?.action?.contains('remove admin') || ctx.event?.action?.contains('create group') || ctx.event?.action?.contains('adding user to group') || ctx.event?.action?.contains('get shared folder data') || ctx.event?.action?.contains('get user data') || ctx.event?.action?.contains('employee invited') || ctx.event?.action?.contains('edit secure note') || ctx.event?.action?.contains('renamed shared folder') || ctx.event?.action?.contains('move to shared folder') || ctx.event?.action?.contains('move from shared folder') || ctx.event?.action?.contains('limit shared folder') || ctx.event?.action?.contains('removed from shared folder') || ctx.event?.action?.contains('update folder permissions') || ctx.event?.action?.contains('delete shared sites') || ctx.event?.action?.contains('multifactor enabled') || ctx.event?.action?.contains('deleted sites')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:84:      if: ctx.event?.action?.contains('failed login attempt')
packages/lastpass/data_stream/event_report/elasticsearch/ingest_pipeline/default.yml:88:      if: ctx.event?.action?.contains('require password change') || ctx.event?.action?.contains('reporting')
packages/mattermost/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:323:      if: "ctx.event?.category.contains('iam')"
packages/microsoft_defender_endpoint/data_stream/log/elasticsearch/ingest_pipeline/default.yml:173:      if: (ctx.json?.description).length() < 1020
packages/mimecast/data_stream/archive_search_logs/elasticsearch/ingest_pipeline/default.yml:82:      if: 'ctx.user?.parts?.length > 1'
packages/mimecast/data_stream/archive_search_logs/elasticsearch/ingest_pipeline/default.yml:86:      if: 'ctx.user?.parts?.length > 1'
packages/nagios_xi/data_stream/host/elasticsearch/ingest_pipeline/default.yml:262:    if: ctx?.json?.current_state?.contains("0")
packages/nagios_xi/data_stream/host/elasticsearch/ingest_pipeline/default.yml:268:    if: ctx?.json?.current_state?.contains("1")
packages/nagios_xi/data_stream/host/elasticsearch/ingest_pipeline/default.yml:274:    if: ctx?.json?.current_state?.contains("2")
packages/nagios_xi/data_stream/host/elasticsearch/ingest_pipeline/default.yml:280:    if: ctx?.json?.current_state?.contains("3")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:242:    if: ctx?.json?.current_state?.contains("0")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:248:    if: ctx?.json?.current_state?.contains("1")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:254:    if: ctx?.json?.current_state?.contains("2")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:260:    if: ctx?.json?.current_state?.contains("3")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:398:    if: ctx?.nagios_xi?.service?.check_command?.contains("check_local_users")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:404:    if: ctx?.nagios_xi?.service?.containsKey("current_users")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:415:    if: ctx?.nagios_xi?.service?.containsKey("current_users")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:423:    if: ctx?.nagios_xi?.service?.check_command?.contains("check_local_load")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:429:    if: ctx?.nagios_xi?.service?.containsKey("current_load")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:450:    if: ctx?.nagios_xi?.service?.containsKey("current_load")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:458:    if: ctx?.nagios_xi?.service?.check_command?.contains("check_ssh") || ctx?.nagios_xi?.service?.check_command?.contains("check_xi_service_ssh")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:464:    if: ctx?.nagios_xi?.service?.containsKey("ssh")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:475:    if: ctx?.nagios_xi?.service?.containsKey("ssh")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:483:    if: ctx?.nagios_xi?.service?.check_command?.contains("check_ping") || ctx?.nagios_xi?.service?.check_command?.contains("check_xi_service_ping")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:489:    if: ctx?.nagios_xi?.service?.containsKey("ping")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:505:    if: ctx?.nagios_xi?.service?.containsKey("ping")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:513:    if: ctx?.nagios_xi?.service?.check_command?.contains("check_local_swap")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:519:    if: ctx?.nagios_xi?.service?.containsKey("swap_usage")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:532:        if(ctx?.nagios_xi?.service?.containsKey("swap_usage")) {
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:541:    if: ctx?.nagios_xi?.service?.containsKey("swap_usage")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:549:    if: ctx?.nagios_xi?.service?.check_command?.contains("check_local_procs")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:555:    if: ctx?.nagios_xi?.service?.containsKey("process")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:566:    if: ctx?.nagios_xi?.service?.containsKey("process")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:574:    if: ctx?.nagios_xi?.service?.check_command?.contains("check_http") || ctx?.nagios_xi?.service?.check_command?.contains("check_xi_service_http")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:580:    if: ctx?.nagios_xi?.service?.containsKey("http")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:596:    if: ctx?.nagios_xi?.service?.containsKey("http")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:604:    if: ctx?.nagios_xi?.service?.check_command?.contains("check_local_disk")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:610:    if: ctx?.nagios_xi?.service?.containsKey("root_partition")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:623:        if(ctx?.nagios_xi?.service?.containsKey("root_partition")) {
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:632:    if: ctx?.nagios_xi?.service?.containsKey("root_partition")
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:639:    if: '!(ctx?.nagios_xi?.service?.containsKey("current_users") || ctx?.nagios_xi?.service?.containsKey("current_load") || ctx?.nagios_xi?.service?.containsKey("ssh") || ctx?.nagios_xi?.service?.containsKey("ping") || ctx?.nagios_xi?.service?.containsKey("swap_usage") || ctx?.nagios_xi?.service?.containsKey("process") || ctx?.nagios_xi?.service?.containsKey("http") || ctx?.nagios_xi?.service?.containsKey("root_partition"))'
packages/nagios_xi/data_stream/service/elasticsearch/ingest_pipeline/default.yml:646:    if: ctx?.event?.dataset?.contains("nagios_xi.custom")
packages/panw_cortex_xdr/data_stream/alerts/elasticsearch/ingest_pipeline/default.yml:204:          if (!ctx.threat?.technique?.id.contains(x)) {
packages/panw_cortex_xdr/data_stream/alerts/elasticsearch/ingest_pipeline/default.yml:207:          if (!ctx.threat?.technique?.name.contains(y)) {
packages/panw_cortex_xdr/data_stream/alerts/elasticsearch/ingest_pipeline/default.yml:211:        for (mitre_technique in ctx.panw_cortex?.xdr?.mitre_technique_id_and_name) {
packages/panw_cortex_xdr/data_stream/alerts/elasticsearch/ingest_pipeline/default.yml:232:          if (!ctx.threat?.tactic?.id.contains(x)) {
packages/panw_cortex_xdr/data_stream/alerts/elasticsearch/ingest_pipeline/default.yml:235:          if (!ctx.threat?.tactic?.name.contains(y)) {
packages/panw_cortex_xdr/data_stream/alerts/elasticsearch/ingest_pipeline/default.yml:239:        for (mitre_tactic in ctx.panw_cortex?.xdr?.mitre_tactic_id_and_name) {
packages/panw_cortex_xdr/data_stream/incidents/elasticsearch/ingest_pipeline/default.yml:126:        for (mitre_technique in ctx.panw_cortex?.xdr?.mitre_techniques_ids_and_names) {
packages/panw_cortex_xdr/data_stream/incidents/elasticsearch/ingest_pipeline/default.yml:154:        for (mitre_tactic in ctx.panw_cortex?.xdr?.mitre_tactics_ids_and_names) {
packages/pfsense/data_stream/log/elasticsearch/ingest_pipeline/php-fpm.yml:21:      if: 'ctx._tmp?.action.toLowerCase().contains("success")'
packages/pfsense/data_stream/log/elasticsearch/ingest_pipeline/php-fpm.yml:25:      if: 'ctx._tmp?.action.toLowerCase().contains("authentication error")'
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:24:      if: ctx.json?.action?.type?.toLowerCase().contains('created') || ctx.json.action.type.toLowerCase().contains('deleted') || ctx.json.action.type.toLowerCase().contains('updated') || ctx.json.action.type.toLowerCase().contains('access_allowed')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:28:      if: ctx.json?.action?.type?.toLowerCase().contains('created')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:32:      if: ctx.json?.action?.type?.toLowerCase().contains('deleted')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:36:      if: ctx.json?.action?.type?.toLowerCase().contains('updated')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:40:      if: ctx.json?.action?.type?.toLowerCase().contains('user')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:44:      if: ctx.json?.action?.type?.toLowerCase().contains('group')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:48:      if: ctx.json?.action?.type?.toLowerCase().contains('allowed')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:52:      if: ctx.json?.action?.type?.toLowerCase().contains('denied')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:56:      if: ctx.json?.action?.type?.toLowerCase().contains('started')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:60:      if: ctx.json?.action?.type?.toLowerCase().contains('access_allowed')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:64:      if: ctx.json?.action?.type?.toLowerCase().contains('password.check_succeeded')
packages/ping_one/data_stream/audit/elasticsearch/ingest_pipeline/default.yml:68:      if: ctx.json?.action?.type?.toLowerCase().contains('email')
packages/proofpoint_tap/data_stream/message_blocked/elasticsearch/ingest_pipeline/default.yml:237:            for (artifact in ctx.json?.threatsInfoMap) {
packages/proofpoint_tap/data_stream/message_blocked/elasticsearch/ingest_pipeline/default.yml:237:            for (artifact in ctx.json?.threatsInfoMap) {
packages/proofpoint_tap/data_stream/message_delivered/elasticsearch/ingest_pipeline/default.yml:233:            for (artifact in ctx.json?.threatsInfoMap) {
packages/proofpoint_tap/data_stream/message_delivered/elasticsearch/ingest_pipeline/default.yml:233:            for (artifact in ctx.json?.threatsInfoMap) {
packages/salesforce/data_stream/login_stream/elasticsearch/ingest_pipeline/default.yml:218:    if: '!ctx.source?.geo?.location?.containsKey("lat") && !ctx.source?.geo?.location?.containsKey("lon")'
packages/suricata/data_stream/eve/elasticsearch/ingest_pipeline/dns-answer-v2.yml:16:        for (def answer : ctx?.dns?.answers) {
packages/tenable_sc/data_stream/asset/elasticsearch/ingest_pipeline/default.yml:190:        if (nameArray?.length > 0) {
packages/tenable_sc/data_stream/vulnerability/elasticsearch/ingest_pipeline/default.yml:462:        if (nameArray?.length > 0) {
packages/ti_cif3/data_stream/feed/elasticsearch/ingest_pipeline/default.yml:72:      if: "['md5', 'sha1', 'sha256', 'sha512', 'ssdeep'].contains(ctx.cif3?.itype) && !ctx.cif3?.tags.contains('ja3')"
packages/trendmicro/data_stream/deep_security/elasticsearch/ingest_pipeline/default.yml:40:      if: "ctx.trendmicro?.event?.signature_id >= 6000000 && ctx.trendmicro?.event?.signature_id <= 6999999"
packages/trendmicro/data_stream/deep_security/elasticsearch/ingest_pipeline/default.yml:52:      if: "ctx.trendmicro?.event?.signature_id >= 4000000 && ctx.trendmicro?.event?.signature_id <= 4999999"
packages/trendmicro/data_stream/deep_security/elasticsearch/ingest_pipeline/default.yml:55:      if: "ctx.trendmicro?.event?.signature_id >= 100 && ctx.trendmicro?.event?.signature_id <= 7499"
packages/trendmicro/data_stream/deep_security/elasticsearch/ingest_pipeline/default.yml:61:      if: "ctx.trendmicro?.event?.signature_id >= 5000000 && ctx.trendmicro?.event?.signature_id <= 5999999"
packages/vectra_detect/data_stream/log/elasticsearch/ingest_pipeline/pipeline-account-detection.yml:107:      if: ctx.vectra_detect?.log?.account?.uid.contains('@')
packages/zeek/data_stream/kerberos/elasticsearch/ingest_pipeline/default.yml:185:      if: ctx.zeek?.kerberos?.client.contains('/')
packages/zeek/data_stream/known_certs/elasticsearch/ingest_pipeline/default.yml:46:      if: ctx.host?.ip.contains('.')
packages/zeek/data_stream/known_certs/elasticsearch/ingest_pipeline/default.yml:50:      if: ctx.host?.ip.contains(':')
packages/zeek/data_stream/known_hosts/elasticsearch/ingest_pipeline/default.yml:46:      if: ctx.host?.ip.contains('.')
packages/zeek/data_stream/known_hosts/elasticsearch/ingest_pipeline/default.yml:50:      if: ctx.host?.ip.contains(':')
packages/zeek/data_stream/known_services/elasticsearch/ingest_pipeline/default.yml:45:      if: ctx.host?.ip.contains('.')
packages/zeek/data_stream/known_services/elasticsearch/ingest_pipeline/default.yml:49:      if: ctx.host?.ip.contains(':')
packages/zeek/data_stream/ntp/elasticsearch/ingest_pipeline/default.yml:95:      if: ctx.source?.ip.contains('.')
packages/zeek/data_stream/ntp/elasticsearch/ingest_pipeline/default.yml:99:      if: ctx.source?.ip.contains(':')
packages/zeek/data_stream/signature/elasticsearch/ingest_pipeline/default.yml:83:      if: ctx.source?.ip.contains('.')
packages/zeek/data_stream/signature/elasticsearch/ingest_pipeline/default.yml:87:      if: ctx.source?.ip.contains(':')
packages/zeek/data_stream/software/elasticsearch/ingest_pipeline/default.yml:50:      if: ctx.host?.ip.contains('.')
packages/zeek/data_stream/software/elasticsearch/ingest_pipeline/default.yml:54:      if: ctx.host?.ip.contains(':')
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:100:      if: "ctx?.event?.action.startsWith('account')"
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:103:      if: "ctx?.event?.action.startsWith('chat_message')"
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:106:      if: "ctx?.event?.action.startsWith('chat_channel')"
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:109:      if: "ctx?.event?.action.startsWith('phone')"
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:112:      if: "ctx?.event?.action.startsWith('recording')"
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:115:      if: "ctx?.event?.action.startsWith('user')"
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:118:      if: "ctx?.event?.action.startsWith('webinar')"
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:121:      if: "ctx?.event?.action.startsWith('zoomroom')"
packages/zoom/data_stream/webhook/elasticsearch/ingest_pipeline/default.yml:97:      if: "ctx?.event?.action.startsWith('meeting')"

Variations of the problem

In these identified cases there were a number of different types of null handling errors:

• null as the result of an if condition: if (ctx?.risky?.value)
• null an an operand of a boolean operator: if: ctx.event?.action?.contains('substring') || ...
• null as an operand of a comparison operator if (nameArray?.length > 0)
• null in the iteration statement of a for loop: for (item in ctx.risky?.items)
• Unsafe invocation of the equals() method: if (ctx.event?.action.equals("some action"))
• Incomplete use of the null safe operator: if (ctx?.safe.notSafe.moreNotSafe(arg))
• Inconsistent use of the null safe operator:
  if: '[...].contains(ctx.risk.unprotected) && ![...].contains(ctx?.risk?.protected)'

Constructed examples

POST _scripts/painless/_execute
{
  "script": {
    "params": {
      "weather": {
        "temperature": null
      },
      "plans": {
        "beAlone": null,
        "swim": null,
        "sit": true
      },
      "books": {
        "finished": null
      }
    },
    "source": """
      def beachBag = [];

      if (params.plans?.beAlone) {                    // if condition
        beachBag.add("thoughts");
      } else {
        beachBag.add("a friend");
      }

      if (params.plans?.swim || params.plans?.sit) {  // operand of boolean operator
        beachBag.add("a towel");
      }

      if (params.weather?.temperature <= 20) {        // operand of comparison operator
        beachBag.add("a coat");
      } else {
        beachBag.add("a hat");
      }

      def books = ["The Little Prince"];
      beachBag.addAll(books);
      for (finishedBook in params.books?.finished) {  // iteration statement of for loop
        beachBag.removeIf(b -> b == finishedBook);
      }
      
      if (params.weather?.sun.bright == true) {       // incomplete null safe
        beachBag.add("sunglasses");
      }
      
      if (params.plans?.swim.equals(true)) {          // equals()
        beachBag.add("a swimsuit");
      }
      
      return "I'm going to the beach and I'm bringing " + beachBag;
    """
  }
}

Checklist of fixes

It's probably best to fix these with a separate pull request for each integration.

sec-deployment-and-devices

• cisco_asa (offending code removed)
• cisco_ftd [cisco_ftd] Null handling and other clean-up #9141
• cisco_ise cisco_ise: fix handling of potentially null method call receivers #9004
• cisco_nexus
• fortinet_fortigate
• juniper_srx
• pfsense
• suricata
• zeek zeek: fix handling of potentially null method call receivers #9005

sec-windows-platform

• hid_bravura_monitor

security-service-integrations

• atlassian_bitbucket
• atlassian_confluence
• atlassian_jira
• box_events
• cisco_meraki
• cisco_secure_endpoint cisco_secure_endpoint: fix handling of potentially null method call receivers #9006
• cloudflare
• cloudflare_logpush
• cyberarkpas [cyberarkpas] Clean up null handling, formatting #9182
• github [github] Clean up null handling, formatting #9181
• infoblox_nios [infoblox_nios] Clean up null handling, formatting #9180
• jamf_compliance_reporter [jamf_compliance_reporter] Clean up null handling, other checks, scripting #9179
• lastpass lastpass: conditional field access and grok cleanup #9002
• mattermost [mattermost] Clean up null handling and Painless scripts #9177
• microsoft_defender_endpoint [microsoft_defender_endpoint] Clean up null handling #9176
• mimecast
• panw_cortex_xdr [panw_cortex_xdr] Clean up null handling #9175
• ping_one ping_one: fix handling of potentially null method call receivers #9076
• proofpoint_tap [proofpoint_tap] Clean up null handling #9153
• tenable_sc [tenable_sc] Clean up null handling #9152
• trendmicro
• ti_cif3 [ti_cif3] Clean up null handling #9148
• vectra_detect [vectra_detect] Clean up null handling #9151
• zoom zoom: clean-up #9077

stack-monitoring

• elasticsearch

obs-infraobs-intergrations

• nagios_xi nagios_xi: fix handling of potentially null method call receivers #9003
• salesforce

obs-ds-hosted-services

• aws

ecosystem

• elastic_package_registry