We've forgotten to update root's last_snapshot gen to the latest sub transid, so that we will free some extent buffers unexpectedly. And this will cause a inconsistent tree crash. Signed-off-by: Liu Bo <liubo2009@xxxxxxxxxxxxxx> --- fs/btrfs/transaction.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index e3d2970..e31cdef 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -927,7 +927,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, BUG_ON(ret); record_root_in_trans(trans, root); - btrfs_set_root_last_snapshot(&root->root_item, trans->transid); + btrfs_set_root_last_snapshot(&root->root_item, + trans->transaction->sub_transid); memcpy(new_root_item, &root->root_item, sizeof(*new_root_item)); btrfs_check_and_init_root_item(new_root_item); -- 1.6.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
