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Bug #69858 Segmentation fault when worker timeout is low
Submitted: 2015-06-17 06:18 UTC Modified: 2017-01-10 08:25 UTC
Votes:3
Avg. Score:4.7 ± 0.5
Reproduced:3 of 3 (100.0%)
Same Version:2 (66.7%)
Same OS:2 (66.7%)
From: anatoly dot ruglaev at gmail dot com Assigned:
Status: Suspended Package: gearman (PECL)
PHP Version: 5.6.10 OS: Solaris (SunOS)
Private report: No CVE-ID: None
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 [2015-06-17 06:18 UTC] anatoly dot ruglaev at gmail dot com
Description:
------------
We have been noticed that our PHP gearman daemon periodically fails with segmentation fault. Yesterday it started to fail on each task coming from queue. 
Fault appears somewhere in GearmanWorker::work() function.
Core analysis says:

Program terminated with signal 11, Segmentation fault.
[New process 88489    ]
#0  gearman_real_malloc (allocator=@0x858, size=342, 
    func=0xffff80ffb8d4411f "receiving", 
    file=0xffff80ffb8d45c34 "libgearman/connection.cc", 
    line=1037) at libgearman/allocator.cc:52
52	  if (allocator.malloc)


After increasing worker timeout from 10ms to 1000ms problem was gone.

Why 10ms? This is default hardcoded timeout in composer package sinergi/gearman.

Reproduced in:
PHP 5.4.42 + gearman 1.1.2
PHP 5.6.6 + gearman 1.1.2

Expected result:
----------------
At least an exception throwed from library if timeout is too low to process jobs

Actual result:
--------------
Segmentation fault

Program terminated with signal 11, Segmentation fault.
[New process 88489    ]
#0  gearman_real_malloc (allocator=@0x858, size=342, 
    func=0xffff80ffb8d4411f "receiving", 
    file=0xffff80ffb8d45c34 "libgearman/connection.cc", 
    line=1037) at libgearman/allocator.cc:52
52	  if (allocator.malloc)


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 [2017-01-10 08:25 UTC] kalle@php.net
-Status: Open +Status: Suspended
 [2017-01-10 08:25 UTC] kalle@php.net
The gearman extension have not had much activity in the past few years, so I'm taking the safe bet that this is no longer under active development (as I don't consider the typo fixes on the github repo an active development), besides that it also targets unsupported PHP versions. Please unsuspend this report in case it begins to blossom with life once more
 
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