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>
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@ -356,6 +356,13 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
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struct extent_buffer *next = read_tree_block(root,
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btrfs_node_blockptr(c, i),
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btrfs_node_ptr_generation(c, i));
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if (IS_ERR(next)) {
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continue;
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} else if (!extent_buffer_uptodate(next)) {
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free_extent_buffer(next);
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continue;
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}
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if (btrfs_is_leaf(next) &&
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level != 1)
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BUG();
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