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From bugzi...@apache.org
Subject [Bug 50335] Cores dumped under high load (segmentation fault signal 11 SIGSEGV)
Date Thu, 12 Dec 2013 15:05:22 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=50335

--- Comment #41 from Ewald Dieterich <ewald_dieterich@t-online.de> ---
I get similar segmentation faults with Apache 2.4.6, apr 1.4.8, apr-util 1.5.3
and mod_security 2.7.5 (from Debian unstable).

I configured a simple reverse proxy and enabled mod_security for a location:

<Location />
    SecRuleEngine On
    SecRequestBodyAccess On

    ProxyPass http://backend:8080/
    ProxyPassReverse http://backend:8080/
</Location>

On the backend I run faucet to simulate a request-dropping backend server:

faucet 8080 --out echo ""

Now I send POST requests in parallel by starting this loop on multiple shells,
the more the better (data_file is 25k):

while true ; do curl -d @data_file http://frontend/ ; done

Every once in a while I get a segmentation fault.

After applying the following patches (attachments 30743 and 31103) I get no
more segmentation faults:

http://svn.apache.org/viewvc?view=revision&revision=1534321
http://svn.apache.org/viewvc?view=revision&revision=1550061

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