[Mod-fcgid-users] Apache consuming all available memory
Several people in the past have reported problems with large uploads
and Apache consumimg all available memory.
Although it is claimed that MaxRequestInMem and MaxRequestLen introduced
in mod_fcgid 2.2 can be used to overcome this memory consumption problem,
it appears that it does not work as intended and the bug remains.
Essentially this can quickly and easily result in a DoS attack.
Memory of the Apache child process appears to increase by approximately the size
of the file being uploaded.nbsp; For example, if I upload a 100MB file the
Apache child
will grow by around 100MB of memory.
I'm not much of a programmer, but I've taken a look at the code.nbsp; In
fcgid_bridge.c,
line 552, there is the following:
if (request_size gt; max_mem_request_len) {
Just before this line is executed, I added a line in source code to log the
values
of 'request_size' and 'max_mem_request_len'.nbsp; The value of request_size is
usually 8000
but is sometimes less than that, but never more than 8000.nbsp; The value of
max_mem_request_len is 65536, which is the default value (64KB).
Therefore, as request_size is not greater than max_mem_request_len, the block
of code added to use a temporary file is never executed.
I'm using these versions on a Linux system
Apache 2.2.8
mod_fcgid 2.2
PHP 5.2.6
I would greatly appeciate if the mod_fcgid developers could take another look
this
problem.nbsp; I am willing to test any patches in order to assist with fixing
this problem.
Regards
-Frank
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[Mod-fcgid-users] Difficulty compiling mod-fcgid on centos 5
Hi,
I'm having a difficult time compiling mod-fcgid. My Make file is this:
#
# Makefile for Apache2
#
builddir = .
top_dir = /usr/lib/httpd
top_srcdir = ${top_dir}
top_builddir = ${top_dir}
VPATH = arch/unix/
#include ${top_builddir}/build/special.mk
include ${top_builddir}/modules.mk
APXS = apxs
APACHECTL = apachectl
EXTRA_CFLAGS = -I$(builddir)
all: local-shared-build
clean:
rm -f *.o *.lo *.slo *.la arch/unix/*.o arch/unix/*.lo arch/unix/*.slo
arch/unix/*.la .libs/* arch/unix/.libs/*
When I run the command I get this output:
[root@ mod_fcgid.2.2]# make top_dir=/usr/lib/httpd/
make: *** No rule to make target `fcgid_bridge.slo', needed by `mod_fcgid.la'.
Stop.
If I uncomment #include ${top_builddir}/build/special.mk it just gives me an
error that special.mk cannot be found. I've researched into what special.mk
is but haven't been able to find anything it doesn't come with the source code
thats for sure. Naturally there isn't any yum depositories I've been able to
find with the module.
Any help is much appreciated!
Andrew
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Re: [Mod-fcgid-users] Difficulty compiling mod-fcgid on centos 5
Wonderful, that link did the trick!!
-Original Message-
From: [EMAIL PROTECTED] on behalf of [EMAIL PROTECTED]
Sent: Wed 6/4/2008 1:06 PM
To: mod-fcgid-users@lists.sourceforge.net
Subject: Re: [Mod-fcgid-users] Difficulty compiling mod-fcgid on centos 5
On Wed, 4 Jun 2008 13:16:37 -0500
Andrew White [EMAIL PROTECTED] wrote:
Hi,
I'm having a difficult time compiling mod-fcgid. My Make file is
this:
#
# Makefile for Apache2
#
builddir = .
top_dir = /usr/lib/httpd
top_srcdir = ${top_dir}
top_builddir = ${top_dir}
VPATH = arch/unix/
#include ${top_builddir}/build/special.mk
include ${top_builddir}/modules.mk
APXS = apxs
APACHECTL = apachectl
EXTRA_CFLAGS = -I$(builddir)
all: local-shared-build
clean:
rm -f *.o *.lo *.slo *.la arch/unix/*.o arch/unix/*.lo
arch/unix/*.slo arch/unix/*.la .libs/* arch/unix/.libs/*
When I run the command I get this output:
[root@ mod_fcgid.2.2]# make top_dir=/usr/lib/httpd/
make: *** No rule to make target `fcgid_bridge.slo', needed by
`mod_fcgid.la'. Stop.
If I uncomment #include ${top_builddir}/build/special.mk it just
gives me an error that special.mk cannot be found. I've researched
into what special.mk is but haven't been able to find anything it
doesn't come with the source code thats for sure. Naturally there
isn't any yum depositories I've been able to find with the module.
Any help is much appreciated!
Andrew
Do you have httpd-devel package installed?
Anyway, this package IS in a yum repo (in EPEL). There's a working one
here:
http://mirrors.xservers.ro/epel/5Server/i386/mod_fcgid-2.2-4.el5.i386.rpm
Good luck!
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