Bugzilla Bug 112728

After upgrading to the masked madwifi-driver-01_pre20051111 (I know it's
testing
and masked and everything) I start the ath0 init script via

/etc/init.d/net.ath0 start

and this happens:

* Caching service dependencies ...                                       [ ok ]
* Starting ath0
 *   Running preup function
/etc/conf.d/net: line 6: 12988 Segmentation fault      
/sbin/wlanconfig ath0 create wlandev wifi0 wlanmode sta

After that the whole system gets somewhat flaky; when rebooting it hangs at
brining down lo0, for example.

The old driver (ebuild 20050420) doesn't work for me anymore with
wpa_supplicant, just times out everytime, no matter what I do, so I upgraded
(had the 20050809 ebuild working fine until yesterday, but after a sync it was
gone and replaced by the 20051111).

Reproducible: Always
Steps to Reproduce:
1. Add to package.keywords
/etc/portage/package.keywords:

...
=net-wireless/madwifi-driver-0.1_pre20051111 ~x86
=net-wireless/madwifi-tools-0.1_pre20051111 ~x86
...

2. Unmask
/etc/portage/package.unmask:

=net-wireless/madwifi-driver-0.1_pre20051111
=net-wireless/madwifi-tools-0.1_pre20051111

3. Emerge the new driver:

emerge -v =net-wireless/madwifi-driver-0.1_pre20051111 
net-wireless/madwifi-tools-0.1_pre20051111

4. Edit /etc/conf.d/net

preup() {
        if [ "${IFACE}" = "ath0" ]; then
                /sbin/wlanconfig ath0 create wlandev wifi0 wlanmode sta
                return $?
        fi
}

postdown() {
        if [ "${IFACE}" = "ath0" ]; then
                /sbin/wlanconfig ath0 destroy
                return $?
        fi
}

config_eth0=( "dhcp" )
modules_eth0=( "ifconfig" )
modules_ath0=( "wpa_supplicant" )
wpa_supplicant_ath0="-Dmadwifi"
preferred_aps=( "one_working_ssid" )
associate_order="forcepreferredonly"
mode_ath0="managed"

5. Load the modules via

modprobe ath_pci

Sidenote: hotplug/net.agent says:

kernel: net.agent[12455]: add event not handled

That's not the problem though, obviously it means that hotplug can't yet handle
the start of /etc/init.d/net.ath0 by itself, yes? 

6. Start the init script:

/etc/init.d/net.ath0 start
Actual Results:  
* Caching service dependencies ...                                       [ ok ]
* Starting ath0
*   Running preup function

/etc/conf.d/net: line 6: 12988 Segmentation fault /sbin/wlanconfig ath0 create
wlandev wifi0 wlanmode sta

Expected Results:  
Create ath0, bring it up to be configured by wpa_supplicant (or iwconfig,
depending).

Portage 2.0.51.22-r3 (default-linux/x86/2005.0, gcc-3.4.4, glibc-2.3.5-r3,
2.6.14-gentoo-r2 i686)
=================================================================
System uname: 2.6.14-gentoo-r2 i686 Intel(R) Pentium(R) M processor 1700MHz
Gentoo Base System version 1.12.0_pre10
dev-lang/python:     2.3.5-r2, 2.4.2
sys-apps/sandbox:    1.2.12
sys-devel/autoconf:  2.13, 2.59-r6
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1
sys-devel/binutils:  2.15.92.0.2-r10
sys-devel/libtool:   1.5.20
virtual/os-headers:  2.6.11-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-march=pentium-m -mtune=pentium-m -O2 -pipe -fomit-frame-pointer
-fforce-addr -frename-registers -fprefetch-loop-arrays -falign-functions=64
-momit-leaf-frame-pointer -ftracer -fweb"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env
/usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config
/usr/lib/X11/xkb /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/splash /etc/terminfo /etc/texmf/web2c
/etc/env.d"
CXXFLAGS="-march=pentium-m -mtune=pentium-m -O2 -pipe -fomit-frame-pointer
-fforce-addr -frename-registers -fprefetch-loop-arrays -falign-functions=64
-momit-leaf-frame-pointer -ftracer -fweb -fvisibility-inlines-hidden"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks sandbox sfperms strict"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/Linux/distributions/gentoo"
LANG="english"
LC_ALL="en_IE.utf8"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="x86 X alsa apm bash-completion browserplugin cdr crypt cups doc dvd
dvdread
ethereal gcj gif gnome gtk gtk2 i8x0 jpeg latex madwifi mmx mp3 ncurses nls
nptl
nptlonly offensive opengl oss pcmcia perl png ppds radeon samba sse sse2 ssl
tetex truetype truetype-fonts unicode usb userlocales win32codecs xml xosd xv
xvid video_cards_radeon userland_GNU kernel_linux elibc_glibc"
Unset:  ASFLAGS, CTARGET, LDFLAGS, LINGUAS, PORTDIR_OVERLAY

Created an attachment (id=73021) [edit]
Stack trace of the segfault

Portage does not unmerge files in /lib/modules/ at the moment
The amrr module is only present in the old madwifi snapshots.
So you have to delete the amrr module yourself in /lib/modules.

find /lib/modules -name "*amrr*"