Commit 17515f1b authored by Qu Wenruo's avatar Qu Wenruo Committed by David Sterba

btrfs: Fix wrong first_key parameter in replace_path

Commit 581c1760 ("btrfs: Validate child tree block's level and first
key") introduced new @first_key parameter for read_tree_block(), however
caller in replace_path() is parasing wrong key to read_tree_block().

It should use parameter @first_key other than @key.

Normally it won't expose problem as @key is normally initialzied to the
same value of @first_key we expect.
However in relocation recovery case, @key can be set to (0, 0, 0), and
since no valid key in relocation tree can be (0, 0, 0), it will cause
read_tree_block() to return -EUCLEAN and interrupt relocation recovery.

Fix it by setting @first_key correctly.

Fixes: 581c1760 ("btrfs: Validate child tree block's level and first key")
Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent c0872323
...@@ -1841,7 +1841,7 @@ int replace_path(struct btrfs_trans_handle *trans, ...@@ -1841,7 +1841,7 @@ int replace_path(struct btrfs_trans_handle *trans,
old_bytenr = btrfs_node_blockptr(parent, slot); old_bytenr = btrfs_node_blockptr(parent, slot);
blocksize = fs_info->nodesize; blocksize = fs_info->nodesize;
old_ptr_gen = btrfs_node_ptr_generation(parent, slot); old_ptr_gen = btrfs_node_ptr_generation(parent, slot);
btrfs_node_key_to_cpu(parent, &key, slot); btrfs_node_key_to_cpu(parent, &first_key, slot);
if (level <= max_level) { if (level <= max_level) {
eb = path->nodes[level]; eb = path->nodes[level];
......
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