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Commit a48f6a2b authored by Joe Thornber's avatar Joe Thornber Committed by Greg Kroah-Hartman
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dm btree remove: fix use after free in rebalance_children() 



commit 1b8d2789dad0005fd5e7d35dab26a8e1203fb6da upstream.

Move dm_tm_unlock() after dm_tm_dec().

Cc: stable@vger.kernel.org
Signed-off-by: default avatarJoe Thornber <ejt@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 23760c59

drivers/md/persistent-data/dm-btree-remove.c

+1 −1
Original line number Diff line number Diff line
@@ -423,9 +423,9 @@ static int rebalance_children(struct shadow_spine *s, 


		memcpy(n, dm_block_data(child),

		       dm_bm_block_size(dm_tm_get_bm(info->tm)));

		dm_tm_unlock(info->tm, child);



		dm_tm_dec(info->tm, dm_block_location(child));

		dm_tm_unlock(info->tm, child);

		return 0;

	}