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Tux's lil' helper
Tux's lil' helper

Joined: 09 Nov 2003
Posts: 149
Location: EU|Austria

PostPosted: Mon Jun 18, 2012 7:40 am    Post subject: zend guard loader php-5.3 cgi mprotect Reply with quote


I tried to run Zend Guard Loader as zend_extension (the preferred way to load the module). After including it every php file segfaults. This seems due to MPROCTECT on /usr/lib64/php5.3/php-cgi , if I remove it by paxctl -m the extension gets loaded as it should. Please let me know if this is a bad idea or how I better can solve that issue.

Error in dmesg:
[5229385.155308] grsec: From denied RWX mprotect of /lib64/ by /usr/lib64/php5.3/bin/php-cgi[php-cgi:25378] uid/euid:10036/10036 gid/egid:10036/10036, parent /usr/sbin/apache2[apache2:25345] uid/euid:81/81 gid/egid:81/81
[5229385.155319] php-cgi[25378]: segfault at 32bf11b5d90 ip 0000032bf0f9bfb4 sp 000003b3c6c1fb00 error 7 in[32bf0f95000+21000]
[5229385.155331] grsec: From Segmentation fault occurred at 0000032bf11b5d90 in /usr/lib64/php5.3/bin/php-cgi[php-cgi:25378] uid/euid:10036/10036 gid/egid:10036/10036, parent /usr/sbin/apache2[apache2:25345] uid/euid:81/81 gid/egid:81/81
[5229385.155344] grsec: From denied resource overstep by requesting 4096 for RLIMIT_CORE against limit 0 for /usr/lib64/php5.3/bin/php-cgi[php-cgi:25378] uid/euid:10036/10036 gid/egid:10036/10036, parent /usr/sbin/apache2[apache2:25345] uid/euid:81/81 gid/egid:81/81

emerge --info

System uname: Linux-3.0.4-hardened-r5-x86_64-QEMU_Virtual_CPU_version_0.15.0-with-gentoo-2.1
Timestamp of tree: Mon, 11 Jun 2012 11:45:01 +0000
app-shells/bash:          4.2_p20
dev-lang/python:          2.4.6, 2.5.4-r4, 2.6.8, 2.7.3-r1, 3.1.5, 3.2.3
dev-util/cmake:           2.8.6-r4
dev-util/pkgconfig:       0.26
sys-apps/baselayout:      2.1-r1
sys-apps/sandbox:         2.5
sys-devel/autoconf:       2.68
sys-devel/automake:       1.11.1
sys-devel/binutils:       2.21.1-r1
sys-devel/gcc:            4.5.3-r2
sys-devel/gcc-config:     1.6
sys-devel/libtool:        2.4-r1
sys-devel/make:           3.82-r1
sys-kernel/linux-headers: 3.1 (virtual/os-headers)
sys-libs/glibc:           2.14.1-r3
Repositories: gentoo
CFLAGS="-mtune=native -O2 -pipe"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt /var/bind"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.3/ext-active/ /etc/php/cgi-php5.3/ext-active/ /etc/php/cli-php5.3/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-mtune=native -O2 -pipe"
FEATURES="assume-digests binpkg-logs distlocks ebuild-locks fixlafiles news parallel-fetch protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphansuserfetch"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LINGUAS="de en"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
USE="acl amd64 apache2 berkdb bzip2 cli cracklib crypt cups cxx dri gdbm gpm hardened iconv jpeg justify mmx modules mudflap mysql ncurses nls nptl openmp pam pax_kernel pcre perl png pppd readline session sse sse2 ssl tcpd unicode urandom xorg zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic auth_digest authn_anon authn_dbd authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config logio mem_cache mime mime_magic negotiation proxy proxy_ajp proxy_balancer proxy_connect proxy_http rewrite setenvif so speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="de en" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga neomagic nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"

Should the extension work without disabling the MPROTECT flag? Is this a bug or normal?

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Retired Dev
Retired Dev

Joined: 08 Jul 2011
Posts: 20
Location: El Salvador

PostPosted: Tue Jul 24, 2012 9:47 pm    Post subject: Reply with quote

Actually, paxctl -m is how I workaround this issue.
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