http://bugzilla.kernel.org/show_bug.cgi?id=7258
------- Additional Comments From christophe@xxxxxxxx 2006-12-03 15:13 -------
We have finally found out, why there are strange problems with dm-crypt
sometimes. If readaheads are cancelled by the underlying block device, the
buffer/page cache could be populated by bogus data. Unfortunately this was
showing itself very rarely and under strange and hard to reproduce
circumstances, and apparently only on top of software raid5.
Anyway, that bug is fixed in 2.6.19 and will be in 2.6.18.6 (missed .5 by some
hours).
The patch can be found here:
http://marc.theaimsgroup.com/?l=linux-kernel&m=116503133222152&w=2
The problem would typically show up as metadata corruption, which not all
filesystems can gracefully handle (i.e. without oopsing).
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