On May 23, 2014, at 11:42 , Hugo Gomes <hugo@xxxxxx> wrote: > Hi Guys, > > I have httpd-2.2.3-85.el5.centos in CentOS release 5.10, i and see all > days, more than 10 times, the error in httpd logs: > > [Thu May 22 01:20:15 2014] [notice] child pid 561 exit signal > Segmentation fault (11) > > > I've investigated logs and don't see nothing wrong with any scripts, > this happens in random times and in random hours each day! > > I've google it and found something with some library > ( https://issues.apache.org/bugzilla/show_bug.cgi?id=14692 ), does > anybody can help me? > > Thanks in advance, > Hugo Gomes You'll have to save core dumps and analyze them with gdb, since the process that segfaulted most likely didn't log the request that caused the crash. There's documentation here: http://httpd.apache.org/dev/debugging.html The important first steps are setting CoreDumpDirectory and ulimit -c unlimited. As soon as you have a core dump, grab a .gdbinit from the appropriate apache source (or package), install the debug info for apache and modules (in redhat-like Linux distributions debuginfo-install may help), and check the request record. You may want to print r->the_request and dump_table (r->headers_in) to see some info that may help you reproduce the problem. Segfaults may indicate a security relevant problem. If you've found that the problem is indeed in apache httpd and could exploited remotely, e.g. to crash the server, you may want to read http://httpd.apache.org/security_report.html and http://www.apache.org/security/ rainer --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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