Re: Unable to handle kernel NULL pointer dereference at virtual address - 2.4.5

[Chris Leger <cleger@helios.jpl.nasa.gov>]

Hi,

I have the same problem, only mine occurs early in the boot process
(right after a message saying something like "trying to mount old
root..."; or maybe s/mount/unmount)so I don't have a log.  I have a
similar system: dual PIIIs w/ Adaptec AIC-7xxx controller, an HP Kayak. 
I saw some earlier messages about AIC-7xxx problems w/ 2.4.5, so I tried
using aic7xxx_old and also tried a patch someone mentioned.  I have yet
to be able to bring up my machine with 2.4.5 under any combination of
aic7xxx drivers, so maybe it's not the driver after all.

Any ideas?  I built the kernel w/ gcc 2.91.66 (kgcc).

Thanks,

Chris Leger

Rafael Martinez writes:
> Hello
>
>     I have got a error in my syslog about a Null pointer in the kernel:
>
>     Kernel 2.4.5
>     glibc 2.2.12
>     gcc version 2.96 20000731 (Red Hat Linux 7.0)
>
>     Modell: ISP2150 
>     Motherboard: L440GX+ DP 
>     CPU: 2 x Intel Pentium III (Coppermine) 850 MHz L2 cache: 256K / Bus: 100 MHz 
>     RAM: 256 MB 
>     SCSI controller: Adaptec AIC-7896/7 Ultra2
>
>Unable to handle kernel NULL pointer dereference at virtual address
>     00000015
>      printing eip:
>     c014db72
>     *pde = 00000000
>     Oops: 0002
>     CPU:    1
>     EIP:    0010:[<c014db72>]
>     EFLAGS: 000

-- 
[ Chris Leger  ::  cleger@robotics.jpl.nasa.gov   (818)393-4462 ]

You can come up with a hundred reasons why a thing can't be done, 
and you have to eat them all when someone else does it.