diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 52f31d59a38e..9f7b7110f629 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1091,7 +1091,8 @@ static noinline int cow_file_range(struct btrfs_inode *inode,
 			 * our outstanding extent for clearing delalloc for this
 			 * range.
 			 */
-			extent_clear_unlock_delalloc(inode, start, end, NULL,
+			extent_clear_unlock_delalloc(inode, start, end,
+				     locked_page,
 				     EXTENT_LOCKED | EXTENT_DELALLOC |
 				     EXTENT_DELALLOC_NEW | EXTENT_DEFRAG |
 				     EXTENT_DO_ACCOUNTING, PAGE_UNLOCK |
@@ -1099,6 +1100,19 @@ static noinline int cow_file_range(struct btrfs_inode *inode,
 			*nr_written = *nr_written +
 			     (end - start + PAGE_SIZE) / PAGE_SIZE;
 			*page_started = 1;
+			/*
+			 * locked_page is locked by the caller of
+			 * writepage_delalloc(), not locked by
+			 * __process_pages_contig().
+			 *
+			 * We can't let __process_pages_contig() to unlock it,
+			 * as it doesn't have any subpage::writers recorded.
+			 *
+			 * Here we manually unlock the page, since the caller
+			 * can't use page_started to determine if it's an
+			 * inline extent or a compressed extent.
+			 */
+			unlock_page(locked_page);
 			goto out;
 		} else if (ret < 0) {
 			goto out_unlock;