# \[Bug 204371\] BUG kmalloc-4k (Tainted: G W ): Object padding overwritten

- From: \<hidden\>
- Date: 2019-08-15 18:35:52 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2019/08/9511615

```text
https://bugzilla.kernel.org/show_bug.cgi?id=204371

--- Comment #31 from Christophe Leroy (christophe.leroy@c-s.fr) ---
Problem 1: test_add_free_space_entry() contains a kzalloc() to allocate a
bitmap. That's the problem.


Problem 2: btrfs_free_dummy_fs_info() has 3 kfree(). Need to know which one is
creating your last warning (kernel BUG at mm/slub.c:3952!)

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