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authorNeilBrown <neilb@suse.de>2013-07-02 15:58:05 +1000
committerNeilBrown <neilb@suse.de>2013-07-03 09:43:28 +1000
commit78eaa0d4cbcdb345992fa3dd22b3bcbb473cc064 (patch)
treeaf855b75f643950b6468ca1bb03daaeb5523286b /drivers/md
parent0baac4db56b1895743391a348ee9ce4ae5076f9f (diff)
downloadlinux-78eaa0d4cbcdb345992fa3dd22b3bcbb473cc064.tar.bz2
md/raid10: fix two bugs affecting RAID10 reshape.
1/ If a RAID10 is being reshaped to a fewer number of devices and is stopped while this is ongoing, then when the array is reassembled the 'mirrors' array will be allocated too small. This will lead to an access error or memory corruption. 2/ A sanity test for a reshaping RAID10 array is restarted is slightly incorrect. Due to the first bug, this is suitable for any -stable kernel since 3.5 where this code was introduced. Cc: stable@vger.kernel.org (v3.5+) Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/raid10.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index aa8ba0760cac..3480bf7c20d4 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -3554,7 +3554,7 @@ static struct r10conf *setup_conf(struct mddev *mddev)
/* FIXME calc properly */
conf->mirrors = kzalloc(sizeof(struct raid10_info)*(mddev->raid_disks +
- max(0,mddev->delta_disks)),
+ max(0,-mddev->delta_disks)),
GFP_KERNEL);
if (!conf->mirrors)
goto out;
@@ -3713,7 +3713,7 @@ static int run(struct mddev *mddev)
conf->geo.far_offset == 0)
goto out_free_conf;
if (conf->prev.far_copies != 1 &&
- conf->geo.far_offset == 0)
+ conf->prev.far_offset == 0)
goto out_free_conf;
}