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| author | NeilBrown <neilb@suse.de> | 2007-05-21 11:33:03 +1000 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2007-08-15 10:02:20 +0200 |
| commit | cb9072a6c6322f4615576537b024a42252b7ac15 (patch) | |
| tree | 2ae02a16146c99268b7b8ad7c2ef90039ea257ea /usr | |
| parent | 5c648b32393875e46f767405eb41911a149eb008 (diff) | |
| download | lwn-cb9072a6c6322f4615576537b024a42252b7ac15.tar.gz lwn-cb9072a6c6322f4615576537b024a42252b7ac15.zip | |
[PATCH] md: Avoid overflow in raid0 calculation with large components.
If a raid0 has a component device larger than 4TB, and is accessed on
a 32bit machines, then as 'chunk' is unsigned lock,
chunk << chunksize_bits
can overflow (this can be as high as the size of the device in KB).
chunk itself will not overflow (without triggering a BUG).
So change 'chunk' to be 'sector_t, and get rid of the 'BUG' as it becomes
impossible to hit.
Cc: "Jeff Zheng" <Jeff.Zheng@endace.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions