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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-22440

Prometheus preprocessing crashes on alpine Linux due to stack size limit

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    • Sprint 98 (Mar 2023)
    • 0.25

      Limit:
      Thread stack size = 131072 bytes
      But there is buffer that exceeds that limit:

      #define ZBX_ITEM_PREPROC_PARAMS_LEN		65535
..
char	pattern[ZBX_ITEM_PREPROC_PARAMS_LEN * ZBX_MAX_BYTES_IN_UTF8_CHAR + 1]

      33557:20230301:131330.767 One child process died (PID:33564,exitcode/signal:11). Exiting ...
 33557:20230301:131330.829 PROCESS EXIT: 33564
zabbix_proxy [33557]: Error waiting for process with PID 33564: [10] No child process
 33557:20230301:131330.835 Zabbix Proxy stopped. Zabbix 6.4.0rc3 (revision edbb7d0eb50)

      .

      Expected:
      Large buffer should be allocated on heap, if so then crash dissapears

            wiper Andris Zeila
            vso Vladislavs Sokurenko
            Team A
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              Created:
              Updated:
              Resolved: