btrfs: assert RAID stripe-extent length is always greater than 0

When modifying a RAID stripe-extent, ASSERT() that the length of the new
RAID stripe-extent is always greater than 0.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/raid-stripe-tree.c b/fs/btrfs/raid-stripe-tree.c
index be923144cc85a0ecb370dbb1ebeea44269a1f4ad..0c351eda3551efec67c35d76d06e648da5f33c71 100644 (file)
--- a/fs/btrfs/raid-stripe-tree.c
+++ b/fs/btrfs/raid-stripe-tree.c
@@ -28,6 +28,7 @@ static void btrfs_partially_delete_raid_extent(struct btrfs_trans_handle *trans,
                .offset = newlen,
        };
 
+       ASSERT(newlen > 0);
        ASSERT(oldkey->type == BTRFS_RAID_STRIPE_KEY);
 
        leaf = path->nodes[0];