[php-maint] Bug#402735: libapache2-mod-php4: Segmentation fault in
php4 double free bug?
Matthijs Mohlmann
matthijs at cacholong.nl
Tue Dec 12 12:29:02 CET 2006
Package: libapache2-mod-php4
Version: 4.4.4-8
Severity: grave
Justification: renders package unusable
Hi,
I've apache 2.2 installed including with libapache2-mod-php4 (same
behaviour if I install fcgid module with php4-cgi). The problem seems to
be a double free bug. Here a backtrace:
root at xciton-pc3 # gdb /usr/sbin/apache2
(gdb) run -X
Starting program: /usr/sbin/apache2 -X
Failed to read a valid object file image from memory.
(no debugging symbols found)
[..]
(no debugging symbols found)
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1215760704 (LWP 17157)]
0xb7c4489f in free () from /lib/tls/i686/cmov/libc.so.6
(gdb) bt
#0 0xb7c4489f in free () from /lib/tls/i686/cmov/libc.so.6
#1 0xb7c4687f in malloc () from /lib/tls/i686/cmov/libc.so.6
#2 0xb76b8c75 in _emalloc () from /usr/lib/apache2/modules/libphp4.so
#3 0xb76cf305 in zend_hash_add_or_update ()
from /usr/lib/apache2/modules/libphp4.so
#4 0xb76d884a in zend_assign_to_variable_reference ()
from /usr/lib/apache2/modules/libphp4.so
#5 0xb76db6db in execute () from /usr/lib/apache2/modules/libphp4.so
#6 0xb76dd61f in execute () from /usr/lib/apache2/modules/libphp4.so
If you need more information please ask. It's partially working here so
I can do things and this is on my development box.
Regards,
Matthijs Mohlmann
-- System Information:
Debian Release: 4.0
APT prefers unstable
APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
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