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Bug #68635 SIGSEGV or SIGABRT in fpm_children_free
Submitted: 2014-12-22 22:32 UTC Modified: 2021-06-13 04:22 UTC
From: Assigned: cmb (profile)
Status: No Feedback Package: FPM related
PHP Version: 5.5.20 OS: Ubuntu 12.04
Private report: No CVE-ID: None
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 [2014-12-22 22:32 UTC]
I am seeing random SIGSEGV and SIGABRT among a # of different fpm-pools in both 5.5.19 and 5.5.20.  This behavior was not seen with 5.5.18.

Test script:
This is happening in 100s of different sites all running the wordpress 4.0.1 though with different plugins/themes.  I haven't been able to detect the code causing the problem since it only shows up randomly under load.

Actual result:
#0  0x00007f5c129253c4 in ?? () from /lib/x86_64-linux-gnu/
(gdb) bt
#0  0x00007f5c129253c4 in ?? () from /lib/x86_64-linux-gnu/
#1  0x0000000000791dfe in fpm_children_free (child=<optimized out>)
    at /build/buildd/php5-5.5.20+dfsg/sapi/fpm/fpm/fpm_children.c:170
#2  0x000000000079ffcd in fpm_worker_pool_cleanup (which=<optimized out>, arg=<optimized out>)
    at /build/buildd/php5-5.5.20+dfsg/sapi/fpm/fpm/fpm_worker_pool.c:43
#3  0x00000000007928e6 in fpm_cleanups_run (type=1)
    at /build/buildd/php5-5.5.20+dfsg/sapi/fpm/fpm/fpm_cleanup.c:45
#4  0x0000000000791d21 in fpm_run (max_requests=0x7ffff25cd1e8)
    at /build/buildd/php5-5.5.20+dfsg/sapi/fpm/fpm/fpm.c:117
#5  0x0000000000466408 in main (argc=6, argv=0x7ffff25cf358)
    at /build/buildd/php5-5.5.20+dfsg/sapi/fpm/fpm/fpm_main.c:1862


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 [2021-06-02 12:55 UTC]
-Status: Open +Status: Feedback -Assigned To: +Assigned To: cmb
 [2021-06-02 12:55 UTC]
Is this this an issue with any of the actively supported PHP

[1] <>
 [2021-06-13 04:22 UTC] php-bugs at lists dot php dot net
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.
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Last updated: Sat Dec 03 02:05:54 2022 UTC