Commit a42cbec9 authored Sep 14, 2016 by Liu Bo Committed by David Sterba Sep 26, 2016

Btrfs: add error handling for extent buffer in print tree



Somehow we missed btrfs_print_tree when last time we
updated error handling for read_extent_block().

This keeps us from getting a NULL pointer panic when
btrfs_print_tree's read_extent_block() fails.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

parent a43f7f82

fs/btrfs/print-tree.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -356,6 +356,13 @@ void btrfs_print_tree(struct btrfs_root root, struct extent_buffer c)
		struct extent_buffer *next = read_tree_block(root,
		btrfs_node_blockptr(c, i),
		btrfs_node_ptr_generation(c, i));
		if (IS_ERR(next)) {
		continue;
		} else if (!extent_buffer_uptodate(next)) {
		free_extent_buffer(next);
		continue;
		}

		if (btrfs_is_leaf(next) &&
		level != 1)
		BUG();