Edit report at https://bugs.php.net/bug.php?id=71482&edit=1
ID: 71482
User updated by: alex dot schneider at sevenval dot com
Reported by: alex dot schneider at sevenval dot com
Summary: Lost zend_string after "reached pm.max_children
setting" with segfault
-Status: Feedback
+Status: Assigned
Type: Bug
Package: PCRE related
Operating System: Linux Mint 17.3
PHP Version: 7.0.2
Assigned To: laruence
Block user comment: N
Private report: N
New Comment:
Yes, we use, but i'a almost sure that the error comes from module "pcre" self.
Is also interesting that there is no longer segfaults, once we disable the "opcache".
Is here a big intern difference between the both functions (original and patched)?
Previous Comments:
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[2016-01-30 04:25:09] laruence@php.net
hmm, do you use any other extensions which is not bundled with php ?
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[2016-01-29 09:12:07] alex dot schneider at sevenval dot com
Description:
------------
The destruction of "HashTable module_registry" sometimes "throws" a segfault in
module "pcre".
I can give you the following infos only:
* The segfault is "thrown" while the destruction of "HashTable module_registry"
by "zend_hash_graceful_reverse_destroy(&module_registry)", but before
"PHP_GSHUTDOWN_FUNCTION(pcre)"
* The trigger is the "ZEND_API void ZEND_FASTCALL zend_hash_destroy(HashTable *ht)"
function in zend_hash.c (line 1272) "if (EXPECTED(p->key)) {" with "Access to
address 0xXXXXXXXXX is not allowed"
In the meantime while my test suite runs, I see in the log:
WARNING: [pool fit] server reached pm.max_children setting (2), consider raising it
I think, the bug is related to #63180.
My patch (attached here) works for me. Perhaps your experts can examine the differences here.
PS: Sorry for my english :)
Test script:
---------------
Unfortunately, i cannot isolate the trigger code from my very complex test suite with a lot of test
methods and requests.
fpmlimits.conf for triggering the segfault:
...
pm = dynamic
pm.max_children = 2
pm.start_servers = 2
pm.min_spare_servers = 2
pm.max_spare_servers = 2
pm.max_requests = 5
...
Expected result:
----------------
No segfaults
Actual result:
--------------
segfaults
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Edit this bug report at https://bugs.php.net/bug.php?id=71482&edit=1