BUG: Bad page state in process swapper pfn:XXXXX

[Robin Murphy]

Hi Arun,

On 25/06/15 11:08, Arun Chandran wrote:
[...]
> A u-boot memtest for those areas resulted in errors[1 in 5 boots]
>
> SOCFPGA_ARRIA5 #  mtest 0x1ff3a000 0x1ff4ffff
> Pattern 00000002  Writing...  Reading...
> Mem error @ 0x1FF4A714: found FFFFFFFF, expected 000041C7
>
> Mem error @ 0x1FF4A718: found 1C00FFFF, expected 000041C8
>
> Mem error @ 0x1FF4A71C: found 143DCB25, expected 000041C9
>
> Mem error @ 0x1FF4A720: found 01000608, expected 000041CA
>
> Mem error @ 0x1FF4A724: found 04060008, expected 000041CB
>
> Mem error @ 0x1FF4A728: found 1C000100, expected 000041CC
>
> Mem error @ 0x1FF4A72C: found 143DCB25, expected 000041CD
>
> Mem error @ 0x1FF4A730: found 1967A20A, expected 000041CE
>
> Mem error @ 0x1FF4A734: found 00000000, expected 000041CF
>
> Mem error @ 0x1FF4A738: found A20A0000, expected 000041D0
>
> Mem error @ 0x1FF4A73C: found 00001667, expected 000041D1
>
> Mem error @ 0x1FF4A740: found 00000000, expected 000041D2
>
> Mem error @ 0x1FF4A744: found 00000000, expected 000041D3
>
> Mem error @ 0x1FF4A748: found 00000000, expected 000041D4
>
> Mem error @ 0x1FF4A74C: found 00000000, expected 000041D5
>
> Mem error @ 0x1FF4A750: found E3D2A784, expected 000041D6
> Pattern 0000000A  Writing...  Reading...
> Mem error @ 0x1FF3AE14: found 005A0320, expected 0000038F
> Pattern FFFFFFF4  Writing...  Reading...
> Mem error @ 0x1FF3AE14: found 00400320, expected FFFFFC6F
> Pattern FFFFFFEF  Writing...  Reading...
>
>
> That means there is problem with my RAM [or board reset].

Or that your bootloader is leaving the network controller DMA'ing over 
kernel memory. That 'corruption' has a suspiciously familiar shape to 
it, and sure enough, turns out to be a valid ethernet packet - Wireshark 
had this to say about it:

1	0.000000000	HonHaiPr_cb:3d:14	Broadcast	ARP	64	Who has 10.162.103.22? 
  Tell 10.162.103.25

Robin.

>
> Sorry for the noise.
>
> --Arun
>
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