[PATCH 4.18 020/158] Btrfs: fix data corruption when deduplicating between different files

4.18-stable review patch. If anyone has any objections, please let me know. -- From: Filipe Manana commit de02b9f6bb65a6a1848f346f7a3617b7a9b930c0 upstream. If we deduplicate extents between two different files we can end up corrupting data if the source range ends at the

[PATCH 4.18 020/158] Btrfs: fix data corruption when deduplicating between different files

4.18-stable review patch. If anyone has any objections, please let me know. -- From: Filipe Manana commit de02b9f6bb65a6a1848f346f7a3617b7a9b930c0 upstream. If we deduplicate extents between two different files we can end up corrupting data if the source range ends at the