> In the 686 asm of csum_partial there is an andl done on a memory address
> that as best will contains only 3 valid bytes. As far as the four byte is
> in the 4mbyte pagetable with the kernel there is no problem (since the
> four byte is then ignored by masking) but in the unlikely case that the
> first one/two/three bytes are the last bytes of a vmalloced area, then
> accessing the second/third/four byte will generate an Oops.
The address is aligned to 4 before it is possible to hit that instruction,
and I don't see how reading 4 bytes aligned to 4 can fault.
- Finn Arne
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