Help needed in debugging the crash of kernel stack overflow

[Kumar Gala]

On May 22, 2008, at 8:08 AM, sandeep malik wrote:

> Hi,
>
> We are using MSC7120 (e300 based) board running Montavista Linux  
> 2.4. We are observing a random crash with the following dump:
>
> Kernel stack overflow in process c5b22000, r1=c5b22460
> NIP: 00000000 XER: 20000000 LR: 00000000 SP: C5B22460 REGS: c5b223b0  
> TRAP: 0400    Tainted: P
> MSR: 20001032 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 11
> TASK = c5b22000[175] 'insmod' Last syscall: -1
> last math 00000000 last altivec 00000000
> GPR00: 00000000 C5B22460 C5B22000 C5B22470 00000000 20001032  
> 00000000 00000000
> GPR08: F0000700 00000000 00000008 00000001 24224482 1033BB30  
> 00000000 00000000
> GPR16: 00000000 00000000 00000000 00000001 00001032 05B22460  
> 00000000 00000000
> GPR24: 00000000 00000200 C7B09400 C016A240 C5B23D80 00000010  
> 00000000 C7B09400
> Call backtrace:
> 70536574 34205220 00000000 00000000 00000000 55555555 55555555
> 55555555 55555555 55555555 55515555 55555555 55555555 55515555
> 55555555 55555555 494C450A 66363531 4F4E455F 35382054 38383053
> 20542056 43686563 53797353 35632052 70383830 74205670 0A636230
> 436D640A 38383053 24108028 C5C740C8 C00059AC
> Kernel panic: kernel stack overflow
> In interrupt handler - not syncing
>
> Any idea what might be going wrong or how to approach this problem  
> as it is not getting reproduced and the behaviour is very random.  
> Any pointers will be helpful.

You really need to take these up with MontaVista.

- k