Btrfs: Add extra checks to avoid removing extent_state from pages we can't free (3dd39914) · Commits · e / devices / android_kernel_xiaomi_markw

fs/btrfs/disk-io.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -436,6 +436,12 @@ static int btree_releasepage(struct page *page, gfp_t gfp_flags)
		struct extent_map_tree *map;
		int ret;

		if (page_count(page) > 3) {
		/* once for page->private, once for the caller, once
		* once for the page cache
		*/
		return 0;
		}
		tree = &BTRFS_I(page->mapping->host)->io_tree;
		map = &BTRFS_I(page->mapping->host)->extent_tree;
		ret = try_release_extent_mapping(map, tree, page, gfp_flags);