From: Yan, Zheng Date: Mon, 1 Feb 2010 02:41:17 +0000 (+0000) Subject: Btrfs: Fix oopsen when dropping empty tree. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7a7965f83e89f0be506a96769938a721e4e5ae50;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git 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 Signed-off-by: Chris Mason --- diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 432a2da4641..559f72489b3 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -5402,10 +5402,6 @@ static noinline int walk_down_tree(struct btrfs_trans_handle *trans, int ret; while (level >= 0) { - if (path->slots[level] >= - btrfs_header_nritems(path->nodes[level])) - break; - ret = walk_down_proc(trans, root, path, wc, lookup_info); if (ret > 0) break; @@ -5413,6 +5409,10 @@ static noinline int walk_down_tree(struct btrfs_trans_handle *trans, if (level == 0) break; + if (path->slots[level] >= + btrfs_header_nritems(path->nodes[level])) + break; + ret = do_walk_down(trans, root, path, wc, &lookup_info); if (ret > 0) { path->slots[level]++;