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| author | Zdenek Kabelac <zkabelac@redhat.com> | 2015-11-13 10:59:58 +0100 |
|---|---|---|
| committer | Zdenek Kabelac <zkabelac@redhat.com> | 2015-11-13 11:17:06 +0100 |
| commit | 007be91e3d128320c290fc404532d1d691212b88 (patch) | |
| tree | 1cb09d5bbaf1ae0f04beca3ce2893331981387a2 | |
| parent | d74e1291cd43f50010c22fb2c071d92390a26d28 (diff) | |
| download | lvm2-007be91e3d128320c290fc404532d1d691212b88.tar.gz | |
raid: ensure area_count is at least 2
Enusure we will not divide by 0.
| -rw-r--r-- | lib/metadata/raid_manip.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/metadata/raid_manip.c b/lib/metadata/raid_manip.c index ee1f2be62..4b2cb610e 100644 --- a/lib/metadata/raid_manip.c +++ b/lib/metadata/raid_manip.c @@ -460,9 +460,14 @@ static int _alloc_image_components(struct logical_volume *lv, * individual devies, we must specify how large the individual device * is along with the number we want ('count'). */ - if (segtype_is_raid10(segtype)) + if (segtype_is_raid10(segtype)) { + if (seg->area_count < 2) { + log_error(INTERNAL_ERROR "LV %s needs at least 2 areas.", + display_lvname(lv)); + return 0; + } extents = lv->le_count / (seg->area_count / 2); /* we enforce 2 mirrors right now */ - else + } else extents = (segtype->parity_devs) ? (lv->le_count / (seg->area_count - segtype->parity_devs)) : lv->le_count; |