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-rw-r--r--drivers/md/dm-snap.c4
-rw-r--r--drivers/md/dm-table.c1
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 594d1f6b4789..ab54f99b7c3b 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -931,6 +931,10 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio)
if (!snap->valid)
continue;
+ /* Nothing to do if writing beyond end of snapshot */
+ if (bio->bi_sector >= dm_table_get_size(snap->table))
+ continue;
+
down_write(&snap->lock);
/*
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 18e9b9953fcd..a5a4c0ed8a14 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -943,6 +943,7 @@ EXPORT_SYMBOL(dm_vcalloc);
EXPORT_SYMBOL(dm_get_device);
EXPORT_SYMBOL(dm_put_device);
EXPORT_SYMBOL(dm_table_event);
+EXPORT_SYMBOL(dm_table_get_size);
EXPORT_SYMBOL(dm_table_get_mode);
EXPORT_SYMBOL(dm_table_put);
EXPORT_SYMBOL(dm_table_get);