diff options
| -rw-r--r-- | fs/btrfs/block-group.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index 66c512bc022c..28aa87872f0d 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -607,6 +607,12 @@ static int sample_block_group_extent_item(struct btrfs_caching_control *caching_ lockdep_assert_held_read(&fs_info->commit_root_sem); extent_root = btrfs_extent_root(fs_info, block_group->start); + if (unlikely(!extent_root)) { + btrfs_err(fs_info, + "missing extent root for block group at offset %llu", + block_group->start); + return -EUCLEAN; + } search_offset = index * div_u64(block_group->length, max_index); search_key.objectid = block_group->start + search_offset; |