From: NeilBrown <neilb@suse.de>
Date: Fri, 3 Feb 2006 11:03:40 +0000 (-0800)
Subject: [PATCH] md: Handle overflow of mdu_array_info_t->size better
X-Git-Tag: v2.6.16-rc3~297
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=284ae7cab0f7335c9e0aa8992b28415ef1a54c7c;p=pandora-kernel.git

[PATCH] md: Handle overflow of mdu_array_info_t->size better

mdu_array_info_t->size is 'int', which isn't big enough for the size (in KB of
each component in) some arrays.

So rather than a random overflow, set size to -1 when it cannot be set
correctly.

To update aspect on an array, userspace will sometimes:
  get_array_info
  change one field
  set_array_info

in this case, we don't want the '-1' in 'size' to change to size, or look like
a size change at all.  So test for that in update_array_info.

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

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