Edit report at https://bugs.php.net/bug.php?id=78280&edit=1
ID: 78280
Updated by: nikic@php.net
Reported by: grzegorz129 at gmail dot com
Summary: _emalloc causes segfaults
Status: Open
Type: Bug
Package: Reproducible crash
Operating System: Linux
PHP Version: 7.3.7
Block user comment: N
Private report: N
New Comment:
Thanks for checking, must be a different problem then. Is this a regression from a recent release?
Does this occur under opcache?
If this is code callable from CLI, can you run PHP using "USE_ZEND_ALLOC=0 valgrind php
script.php" and provide the resulting log?
Previous Comments:
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[2019-07-12 15:58:49] grzegorz129 at gmail dot com
And another ones: https://pastebin.com/06fsMevR
I got my 7.3.7 yesterday from github tgz release. I double checked and the path is in the source I
compiled. I can try compiling latest master if that helps?
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[2019-07-12 15:47:40] nikic@php.net
Where did you get this 7.3.7 release? It was retagged due to a critical opcache bug, and I suspect
your build does not include https://github.com/php/php-src/commit/21465ec0e1c1401751b35a21f45f1d57255d5be9.
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[2019-07-12 15:43:31] grzegorz129 at gmail dot com
Description:
------------
From the start I have to say I don't have a reproducer which I can share, since problem only
demonstrates itself in a large codebase. However, I'm able to consistently reproduce the
problem and I was able to gather couple core dumps.
- https://pastebin.com/AD7Gtv4k
- https://pastebin.com/iG9djuPi
- https://pastebin.com/yMNHsgF2
- https://pastebin.com/PEyBwdry
- https://pastebin.com/bBjPaAEy
The only consistent element I see is the top frames on the chain: _emalloc -> zend_mm_alloc_heap
-> zend_mm_alloc_small
Test script:
---------------
Not available
Expected result:
----------------
-
Actual result:
--------------
Segfault
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Edit this bug report at https://bugs.php.net/bug.php?id=78280&edit=1