[php-maint] Bug#520128: Bug#520128: php5 segfaulting - unknown cause

[Simon Waters]

sean finney wrote:
> 
> On Tue, Mar 17, 2009 at 03:59:12PM +0000, Simon Waters wrote:
>> Since the upgrade to Lenny /var/log/kern.log reports errors like
>> these below:
>> 
>> Mar 17 00:21:50 bannerman kernel: [1734694.376460] php5[12943]:
>> segfault at b73ace90 ip b73ace90 sp b73123ac error 4
> 
> out of curiosity, are the affected systems smp or multi-core systems?

Live is 2 x  Intel(R) Xeon(TM) CPU 2.40GHz, each processor is
hyperthreaded so it presents as 4 CPUs.

Test is 4 x Intel Pentium III (Cascades) 700Mhz.

> if so, could you verify if your problem is the same as:
> 
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513204

I can reproduce the problem described in this bug on the live machine.

Running t.sh results in a segfault sometimes.

Test server wasn't reproducing till I did a "stress -c 4 -i 4 -m 4 &" to
 create some activity, at which point it usually segfaults quite quickly
- only a handful of iterations.

Commenting out "mysqli" and "mysql" extensions from the
/etc/php5/cli/conf.d/ scripts, appears to resolve the segfaults on the
test server.