dm-stripe.c data corruption

["bart brooks" <bart_brooks@xxxxxxxxxxx>]

In RHEL 4 U3 there?s a bug in dm-stripe.c, in the function stripe_map() 
which will result in data corruption.

The call to the macro below will step on the variable chunk, which is used 
later on in the function.
uint32_t stripe = do_div(chunk, sc->stripes);

The following is a very simple solution:

sector_t chunk2 = chunk;
uint32_t stripe = do_div(chunk2, sc->stripes);

Bart


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