> I think I've found a bug in make_request() in ll_rw_blk.c in 2.3.10 or
> 11. The problem is that when access beyond the end of device is done,
> all flags except BH_Locked are cleared. This also means clearing of flag
> BH_Mapped so when you try to read the block second time, ll_rw_block()
> complains about not mapped buffer and does BUG()... My fix simply
> preserves the BH_mapped flag too but I'm not sure this is the right fix.
> If it is, the patch is attached.
yes, this is the correct fix. We should not crash if we detect nonfatal
beyond-limit IO access.
-- mingo
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