[Bug 7968] New: Cisco vpnclient crashes the kernel

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Ubuntu | linux

           Summary: Cisco vpnclient crashes the kernel
           Product: Ubuntu
           Version: unspecified
          Platform: i386
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: linux
        AssignedTo: fabbione at ubuntu.com
        ReportedBy: tjaalton+ubuntu at cc.hut.fi
         QAContact: kernel-bugs at lists.ubuntu.com


I tried compiling the Cisco vpnclient (4.6.00.0045-k9) as a module for
2.6.10-5-686 (2.6.10-28), and the module loads fine but when trying to use it by
running "vpnclient" the machine dies. If I add the module in /etc/modules,
modprobe segfaults on boot and machine dies. I've been using the module on
Debian with 2.6 kernels since 2.6.8 (hand built from vanilla sources, latest
being 2.6.11-rc2) without such problems.

I built the module by first installing linux-kernel-headers, then copied
/boot/config... as /usr/src/linux-headers../.config (otherwise the module
wouldn't load because of version-string mismatch) and then ran vpn_install from
the client tarball. The build process went like this

---

Making module
make -C /usr/src/linux SUBDIRS=/home/tjaalton/vpnclient modules
make[1]: Entering directory `/usr/src/linux-headers-2.6.10-5'
  CC [M]  /home/tjaalton/vpnclient/linuxcniapi.o
  CC [M]  /home/tjaalton/vpnclient/frag.o
  CC [M]  /home/tjaalton/vpnclient/IPSecDrvOS_linux.o
  CC [M]  /home/tjaalton/vpnclient/interceptor.o
/home/tjaalton/vpnclient/interceptor.c: In function `recv_ip_packet_handler':
/home/tjaalton/vpnclient/interceptor.c:607: warning: passing arg 1 of
`skb_checksum_help' from incompatible pointer type
/home/tjaalton/vpnclient/interceptor.c: In function `do_cni_send':
/home/tjaalton/vpnclient/interceptor.c:732: warning: passing arg 1 of
`skb_checksum_help' from incompatible pointer type
  LD [M]  /home/tjaalton/vpnclient/cisco_ipsec.o
  Building modules, stage 2.
  MODPOST
Warning: could not find /home/tjaalton/vpnclient/.libdriver.so.cmd for
/home/tjaalton/vpnclient/libdriver.so
  CC      /home/tjaalton/vpnclient/cisco_ipsec.mod.o
  LD [M]  /home/tjaalton/vpnclient/cisco_ipsec.ko
make[1]: Leaving directory `/usr/src/linux-headers-2.6.10-5'
Copying module to directory "/lib/modules/2.6.10-5-686/CiscoVPN".
Already have group 'bin'

Creating start/stop script "/etc/init.d/vpnclient_init".
    /etc/init.d/vpnclient_init
Enabling start/stop script for run level 3,4 and 5.

Installing license.txt (VPN Client license) in "/opt/cisco-vpnclient/":

Installing bundled user profiles in "/etc/opt/cisco-vpnclient/Profiles/":
* Replaced Profiles: sample

Copying binaries to directory "/opt/cisco-vpnclient/bin".
Adding symlinks to "/usr/local/bin".
    /opt/cisco-vpnclient/bin/vpnclient
    /opt/cisco-vpnclient/bin/cisco_cert_mgr
    /opt/cisco-vpnclient/bin/ipseclog
Copying setuid binaries to directory "/opt/cisco-vpnclient/bin".
    /opt/cisco-vpnclient/bin/cvpnd
Copying libraries to directory "/opt/cisco-vpnclient/lib".
    /opt/cisco-vpnclient/lib/libvpnapi.so
Copying header files to directory "/opt/cisco-vpnclient/include".
    /opt/cisco-vpnclient/include/vpnapi.h

Setting permissions.
    /opt/cisco-vpnclient/bin/cvpnd (setuid root)
    /opt/cisco-vpnclient (group bin readable)
    /etc/opt/cisco-vpnclient (permissions not changed)
* You may wish to change these permissions to restrict access to root.
* You must run "/etc/init.d/vpnclient_init start" before using the client.
* This script will be run AUTOMATICALLY every time you reboot your computer.

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