We look up the reloc roots corresponding root, we need to hold a ref on that root. Signed-off-by: Josef Bacik <josef@xxxxxxxxxxxxxx> --- fs/btrfs/relocation.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 05a301204fd9..0068b7b940f8 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -2474,6 +2474,8 @@ int prepare_to_merge(struct reloc_control *rc, int err) list_del_init(&reloc_root->root_list); root = read_fs_root(fs_info, reloc_root->root_key.offset); + if (!btrfs_grab_fs_root(root)) + BUG(); BUG_ON(IS_ERR(root)); BUG_ON(root->reloc_root != reloc_root); @@ -2486,6 +2488,7 @@ int prepare_to_merge(struct reloc_control *rc, int err) btrfs_update_reloc_root(trans, root); list_add(&reloc_root->root_list, &reloc_roots); + btrfs_put_fs_root(root); } list_splice(&reloc_roots, &rc->reloc_roots); -- 2.24.1
