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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-27106

Zabbix Sender causes SIGSEGV

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    • Icon: Problem report Problem report
    • Resolution: Unresolved
    • Icon: Minor Minor
    • 6.0.43rc1
    • 6.0.41, 6.0.42
    • Server (S)
    • Ubuntu 20.04.06 running on a netcup server.
      The server has 4 CPU cores and 16GB of RAM.
    • S25-W44/45
    • 0.25

      Steps to reproduce:

      Zabbix Server Config:

      LogFile=/var/log/zabbix-server/zabbix_server.log
      PidFile=/var/run/zabbix/zabbix_server.pid
      DBName=<DBName>
      DBUser=<DBUser>
      DBPassword=<DBPassword>
      DBSocket=/var/run/mysqld/mysqld.sock
      CacheSize=500M
      ValueCacheSize=64M
      Timeout=4
      AlertScriptsPath=/etc/zabbix/alert.d/
      FpingLocation=/usr/bin/fping
      LogSlowQueries=3000
      Include=/etc/zabbix/zabbix_server.conf.d/*.conf 

      There are no config files in /etc/zabbix/zabbix_server.conf.d.

      Zabbix Sender:

      When we run the following zabbix_sender command the zabbix server receives a SIGSEGV and restart:

       

      zabbix_sender -z '<zabbix-server>' -s '<host>' -k '<item-key>' -o '{"data":[{"{#KEY}":"Value"}, {"{#OTHERKEY}": "OTHERVALUE"}]}' 

      Right after hitting the zabbix server the SIGSEGV event is logged to the zabbix-server logfile and the zabbix server restarts.

       

      Result:
      I attached the objdump and zabbix server log to this report.
      The objdump output was larger than 50MB so i compressed the file.

        1. zabbix_server_log_sigsegv.log
          56 kB
          Johannes Wagner
        2. zabbix_server_objdump.txt.gz
          14.33 MB
          Johannes Wagner
        3. zbx_export_templates.yaml
          19 kB
          Johannes Wagner
        4. image-2025-10-17-09-23-18-496.png
          19 kB
          Johannes Wagner
        5. image-2025-10-17-09-25-12-067.png
          16 kB
          Johannes Wagner
        6. image-2025-10-17-09-25-33-781.png
          40 kB
          Johannes Wagner
        7. image-2025-10-17-09-25-52-149.png
          48 kB
          Johannes Wagner
        8. zabbix_server_with_allowed_hosts.log.gz
          771 kB
          Johannes Wagner
        9. zabbix_server_without_allowed_hosts.log.gz
          2.12 MB
          Johannes Wagner

            vso Vladislavs Sokurenko
            Jostrus Johannes Wagner
            Team B
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