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@@ -1724,6 +1724,7 @@ again:
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eb = read_tree_block(dest, old_bytenr, blocksize,
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old_ptr_gen);
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+ BUG_ON(!eb);
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btrfs_tree_lock(eb);
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if (cow) {
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ret = btrfs_cow_block(trans, dest, eb, parent,
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@@ -2513,6 +2514,10 @@ static int do_relocation(struct btrfs_trans_handle *trans,
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blocksize = btrfs_level_size(root, node->level);
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generation = btrfs_node_ptr_generation(upper->eb, slot);
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eb = read_tree_block(root, bytenr, blocksize, generation);
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+ if (!eb) {
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+ err = -EIO;
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+ goto next;
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+ }
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btrfs_tree_lock(eb);
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btrfs_set_lock_blocking(eb);
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@@ -2670,6 +2675,7 @@ static int get_tree_block_key(struct reloc_control *rc,
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BUG_ON(block->key_ready);
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eb = read_tree_block(rc->extent_root, block->bytenr,
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block->key.objectid, block->key.offset);
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+ BUG_ON(!eb);
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WARN_ON(btrfs_header_level(eb) != block->level);
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if (block->level == 0)
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btrfs_item_key_to_cpu(eb, &block->key, 0);
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