tree abf9e37302ce587c8c62e430aaf9f004548e653c
parent 713f6ab18b0e7d39f14401362bfe8015b1aedde1
author NeilBrown <neilb@suse.de> 1184670372 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184692995 -0700

md: check that internal bitmap does not overlap other data

We current completely trust user-space to set up metadata describing an
consistant array.  In particlar, that the metadata, data, and bitmap do not
overlap.

But userspace can be buggy, and it is better to report an error than corrupt
data.  So put in some appropriate checks.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>