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Btrfs: Fix oopsen when dropping empty tree.
When dropping a empty tree, walk_down_tree() skips checking extent information for the tree root. This will triggers a BUG_ON in walk_up_proc(). Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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1 changed files with 4 additions and 4 deletions
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@ -5402,10 +5402,6 @@ static noinline int walk_down_tree(struct btrfs_trans_handle *trans,
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int ret;
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while (level >= 0) {
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if (path->slots[level] >=
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btrfs_header_nritems(path->nodes[level]))
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break;
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ret = walk_down_proc(trans, root, path, wc, lookup_info);
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if (ret > 0)
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break;
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@ -5413,6 +5409,10 @@ static noinline int walk_down_tree(struct btrfs_trans_handle *trans,
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if (level == 0)
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break;
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if (path->slots[level] >=
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btrfs_header_nritems(path->nodes[level]))
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break;
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ret = do_walk_down(trans, root, path, wc, &lookup_info);
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if (ret > 0) {
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path->slots[level]++;
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