tree 001c226f54ef3310d71b4dc011ef442dcd6ecc4f
parent 1a0afa0ecfc4dbc8d7583d03cafd3f68f781df0c
author Josef Bacik <josef@toxicpanda.com> 1584114286 -0400
committer David Sterba <dsterba@suse.com> 1584979318 +0100

btrfs: clear DEAD_RELOC_TREE before dropping the reloc root

The DEAD_RELOC_TREE flag is in place in order to avoid a use after free
in init_reloc_root, tracking the presence of reloc_root.  However adding
the explicit tree references in previous patches makes the use after
free impossible because at this point we no longer have a reloc_control
set on the fs_info and thus cannot enter the function.

So move this to be coupled with clearing the root->reloc_root so we're
consistent with all other operations of the reloc root.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>