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-rw-r--r--drivers/md/dm-snap.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 7e691ab9a748..ab54f99b7c3b 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -777,7 +777,7 @@ static int snapshot_map(struct dm_target *ti, struct bio *bio,
/* Full snapshots are not usable */
if (!s->valid)
- return -1;
+ return -EIO;
/*
* Write to snapshot - higher level takes care of RW/RO
@@ -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);
/*