Re: Kernel Panic in SANDPOINT 5.99.64-GENERIC on DSM-G600

[Frank Wille <frank%phoenix.owl.de@localhost>]

On Mon, 13 Feb 2012 19:44:31 +0100
Charles Brown <obigiankenobi%gmail.com@localhost> wrote:

> I'm experiencing a kernel panic on my DSM-G600 rev.B2.
> 1) Enable ftp server via inetd in /etc/inetd.conf
> 2) Connect via ethernet the DSM-G600 to a PC (my linux machine).
> 3) Create a 1GB file using: dd if=/dev/zero of=1giga bs=1024
> count=1000000 in the linux machine.
> 4) Connect to DSM-G600 via ftp and try to send him 1 giga using: put
> 1giga Few seconds e...:
> 
> dsm-g600# trap: kernel read DSI trap @ 0xd1a6752e by 0x995d0 (DSISR
> 0x40000000, err=14), lr 0x99954
> panic: trap
> cpu0: Begin traceback...
> 0x00664a00: at panic+0x4c
> 0x00664a40: at trap+0x104
> 0x00664ad0: kernel DSI read trap @ 0xd1a6752e by m_xhalf+0x9c:

The crash happened in bpf_filter.c, accessing a page in kmem-space.
I hope this is not another problem caused by the kmem/malloc changes after
5.99.60.


> srr1=0x9030 r1=0x664ba0 cr=0x40002048 xer=0 ctr=0x9982c
> dsisr=0x40000000 saved LR(0xffffefef) is invalid.cpu0: End

Hmm. Corrupted stack frame?


For a test you can disable the bpf(4) device. Comment out the line
  pseudo-device   bpfilter                # packet filter
in your config and recompile the kernel.


> traceback... dumpsys: TBD
> *

Yes... to be done... :|


> [...]
> Checking for core dump...
> savecore: no core dump <--------

It really should be done. AFAIK no PPC port can currently dump a
system core.


> I tried also ftp get to DSM-G600, same result (build of the 1giga file
> using dd on DSM-G600 works fine, so I think that is not a disk issue).
> This happens every time.

Also at the same or similar position in the transfer?


> Could someone try to reproduce and confirm this?

I tried it from an VIA-Epia board to a Synology DS-101g+, running 5.99.59.
Transfer rates from only 100KB/s. There must be a problem with the
Epia's i82540EM 1000BASE-T Ethernet adapter. But no crash.

Then I tried it from a Soekris (AMD-Elan based) box to a QNAP TS-101,
running 5.99.48. Transfer rates up to 800KB/s. But the Soekris is slow
(133MHz). No crash again.

In both cases all network interfaces run at 100baseTX full-duplex.
Did you use Gigabit-Ethernet?

I can try again with my G600 and a recent kernel this evening.

-- 
Frank Wille