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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-19067

memcpy(NULL, NULL, 0) in process CPU statistics collector

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    Details

    • Type: Problem report
    • Status: Confirmed
    • Priority: Trivial
    • Resolution: Unresolved
    • Affects Version/s: 4.0.30rc1
    • Fix Version/s: None
    • Component/s: Agent (G)
    • Labels:
      None
    • Environment:
      GNU/Linux

      Description

      Steps to reproduce:

      1. Create item proc.cpu.util[,,,No such process]
      2. Compile agent with GCC hardened flags (see attachment gcc9_c_options.txt).
      3. Run agent with DebugLevel=4
      4. Observe in agent log
         90146:20210226:232200.270 Requested [proc.cpu.util[,,,No such process]]
         90146:20210226:232200.270 In procstat_add()
         90146:20210226:232200.270 In zbx_dshm_realloc() shmid:-1 size:21704
         90146:20210226:232200.270 In procstat_copy_data()
         90146:20210226:232200.270 End of procstat_copy_data()
         90146:20210226:232200.270 End of zbx_dshm_realloc():SUCCEED shmid:360472
         90146:20210226:232200.270 End of procstat_add()
         90144:20210226:232200.612 __zbx_zbx_setproctitle() title:'collector [processing data]'
         90144:20210226:232200.612 In update_cpustats()
         90144:20210226:232200.612 End of update_cpustats()
         90148:20210226:232200.616 In send_buffer() host:'127.0.0.1' port:10091 entries:0/100
         90148:20210226:232200.616 End of send_buffer():SUCCEED
         90148:20210226:232200.616 __zbx_zbx_setproctitle() title:'active checks #1 [idle 1 sec]'
        procstat.c:756:3: runtime error: null pointer passed as argument 1, which is declared to never be null
        procstat.c:756:3: runtime error: null pointer passed as argument 2, which is declared to never be null
        

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            Assignee:
            zabbix.dev Zabbix Development Team
            Reporter:
            andris Andris Mednis
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              Dates

              Created:
              Updated: