Hello.

I encounter this problem while configuring my evaluation copy of 
Workstation 5. I have the trial version VMware-workstation-5.0.0-13124, 
it was installed successfully and worked fine in linux-2.6.11. The 
problem occurs when I change kernel  to linux-2.6.12-rc5-mm1 and try to 
configure this kernel to load the VMWare modules:

bones:~ # /usr/bin/vmware-config.pl
Making sure services for VMware Workstation are stopped.

Stopping VMware services:
   Virtual machine monitor                                             done
   Bridged networking on /dev/vmnet0                                   done
   DHCP server on /dev/vmnet1                                          done
   Host-only networking on /dev/vmnet1                                 done
   Virtual ethernet                                                    done

Configuring fallback GTK+ 2.4 libraries.

In which directory do you want to install the mime type icons?
[/usr/share/icons]

What directory contains your desktop menu entry files? These files have a
.desktop file extension. [/usr/share/applications]

In which directory do you want to install the application's icon?
[/usr/share/pixmaps]

Trying to find a suitable vmmon module for your running kernel.

None of the pre-built vmmon modules for VMware Workstation is suitable 
for your
running kernel.  Do you want this program to try to build the vmmon 
module for
your system (you need to have a C compiler installed on your system)? [yes]

Using compiler "/usr/bin/gcc". Use environment variable CC to override.

What is the location of the directory of C header files that match your 
running
kernel? [/lib/modules/2.6.12-rc5-mm1/build/include]

Extracting the sources of the vmmon module.

Building the vmmon module.

Using 2.6.x kernel build system.
make: Entering directory `/tmp/vmware-config5/vmmon-only'
make -C /lib/modules/2.6.12-rc5-mm1/build/include/.. SUBDIRS=$PWD 
SRCROOT=$PWD/. modules
make[1]: Entering directory 
`/home/grev/kernels/2.6.12-rc5/linux-2.6.12-mm-bk'
  CC [M]  /tmp/vmware-config5/vmmon-only/linux/driver.o
  CC [M]  /tmp/vmware-config5/vmmon-only/linux/hostif.o
  CC [M]  /tmp/vmware-config5/vmmon-only/common/cpuid.o
  CC [M]  /tmp/vmware-config5/vmmon-only/common/hash.o
  CC [M]  /tmp/vmware-config5/vmmon-only/common/memtrack.o
  CC [M]  /tmp/vmware-config5/vmmon-only/common/phystrack.o
  CC [M]  /tmp/vmware-config5/vmmon-only/common/task.o
  CC [M]  /tmp/vmware-config5/vmmon-only/common/vmx86.o
  CC [M]  /tmp/vmware-config5/vmmon-only/vmcore/moduleloop.o
  LD [M]  /tmp/vmware-config5/vmmon-only/vmmon.o
  Building modules, stage 2.
  MODPOST
  CC      /tmp/vmware-config5/vmmon-only/vmmon.mod.o
  LD [M]  /tmp/vmware-config5/vmmon-only/vmmon.ko
make[1]: Leaving directory 
`/home/grev/kernels/2.6.12-rc5/linux-2.6.12-mm-bk'
cp -f vmmon.ko ./../vmmon.o
make: Leaving directory `/tmp/vmware-config5/vmmon-only'
The module loads perfectly in the running kernel.

You have already setup networking.

Would you like to skip networking setup and keep your old settings as 
they are?
(yes/no) [yes] yes

Extracting the sources of the vmnet module.

Building the vmnet module.

Using 2.6.x kernel build system.
make: Entering directory `/tmp/vmware-config5/vmnet-only'
make -C /lib/modules/2.6.12-rc5-mm1/build/include/.. SUBDIRS=$PWD 
SRCROOT=$PWD/. modules
make[1]: Entering directory 
`/home/grev/kernels/2.6.12-rc5/linux-2.6.12-mm-bk'
  CC [M]  /tmp/vmware-config5/vmnet-only/driver.o
  CC [M]  /tmp/vmware-config5/vmnet-only/hub.o
  CC [M]  /tmp/vmware-config5/vmnet-only/userif.o
/tmp/vmware-config5/vmnet-only/userif.c: In function 
`VNetUserIfMapUint32Ptr':
/tmp/vmware-config5/vmnet-only/userif.c:152: warning: `verify_area' is 
deprecated (declared at include/asm/uaccess.h:105)
/tmp/vmware-config5/vmnet-only/userif.c:153: warning: `verify_area' is 
deprecated (declared at include/asm/uaccess.h:105)
  CC [M]  /tmp/vmware-config5/vmnet-only/netif.o
  CC [M]  /tmp/vmware-config5/vmnet-only/bridge.o
/tmp/vmware-config5/vmnet-only/bridge.c: In function `VNetBridgeUp':
/tmp/vmware-config5/vmnet-only/bridge.c:716: warning: passing arg 3 of 
`sk_alloc' makes pointer from integer without a cast
/tmp/vmware-config5/vmnet-only/bridge.c:716: warning: passing arg 4 of 
`sk_alloc' makes integer from pointer without a cast
  CC [M]  /tmp/vmware-config5/vmnet-only/procfs.o
  LD [M]  /tmp/vmware-config5/vmnet-only/vmnet.o
  Building modules, stage 2.
  MODPOST
  CC      /tmp/vmware-config5/vmnet-only/vmnet.mod.o
  LD [M]  /tmp/vmware-config5/vmnet-only/vmnet.ko
make[1]: Leaving directory 
`/home/grev/kernels/2.6.12-rc5/linux-2.6.12-mm-bk'
cp -f vmnet.ko ./../vmnet.o
make: Leaving directory `/tmp/vmware-config5/vmnet-only'
The module loads perfectly in the running kernel.

Starting VMware services:
   Virtual machine monitor                                             done
   Virtual ethernet                                                    done
   Bridged networking on /dev/vmnet0

---------
The kernel fails here with the following kgdb trace (attached).
I can provide more information if it is nedeed.

Thanks,
Lena