apache2 crashed with SIGSEGV in zend_hash_graceful_reverse_destroy()

[Daniel Hahler]

Binary package hint: apache2

This looks like a crash in PHP (mod_php).

I cannot say if this was on Apache startup or opening a browser with previously opened tabs (therefore a "normal" (set of) request(s)).

ProblemType: Crash
DistroRelease: Ubuntu 10.04
Package: apache2.2-bin 2.2.14-5ubuntu8
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Mon Apr 26 23:41:17 2010
Disassembly: => 0x404950: Cannot access memory at address 0x404950
ExecutablePath: /usr/lib/apache2/mpm-prefork/apache2
ProcCmdline: /usr/sbin/apache2 -k start
ProcEnviron:
 PATH=(custom, no user)
 LANG=C
SegvAnalysis:
 Segfault happened at: 0x404950: Cannot access memory at address 0x404950
 PC (0x00404950) not located in a known VMA region (needed executable region)!
SegvReason: executing unknown VMA
Signal: 11
SourcePackage: apache2
StacktraceTop:
 ?? ()
 ?? () from /usr/lib/apache2/modules/libphp5.so
 ?? () from /usr/lib/apache2/modules/libphp5.so
 zend_hash_graceful_reverse_destroy ()
 ?? () from /usr/lib/apache2/modules/libphp5.so
Title: apache2 crashed with SIGSEGV in zend_hash_graceful_reverse_destroy()
UserGroups:

[Daniel Hahler (blueyed)]

Re-assigning to php5 - please correct me if I'm wrong.

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 zend_hash_apply_deleter (ht=0x21056f38, p=0x21099680)
 zend_hash_graceful_reverse_destroy (ht=0x1672b00)
 zend_shutdown () at /build/buildd/php5-5.3.2/Zend/zend.c:831
 php_module_shutdown ()

[Daniel Hahler (blueyed)]

Assigning to php-apc: removing it again does not make PHP/Apache crash on every request of a particular, local page.

[Daniel Hahler (blueyed)]

I had php-apc installed locally, just before these crashes started to happen.

[Daniel Hahler (blueyed)]

This happens when both php-apc and php5-xcache are being installed - even when just calling/requesting an empty test.php file - using mod_php5.

IIRC this did not happen when running via php5-fpm and/or php5-cgi - I could try that, of course.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.