Re: [PATCH 2/5] btrfs: tree-checker: reject inline refs not matching the extent type

[Siddharth Mishra]

On Wed, Nov 04, 2026 at 11:24:15AM -0800, Boris Burkov wrote:
> > 	item 9 key (30478336 METADATA_ITEM 0) itemoff 3636 itemsize 33
> > 		refs 1 gen 13 flags TREE_BLOCK
> > 		tree block skinny level 0
> > 		(172 0x5) extent owner root 5
> > 		^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >
>
> I assume this was crafted manually, not via btrfs operations with
> squotas enabled, right?

Right, it is a corrupted image found by fuzzing. I did not find a way
to get an owner ref on a tree block with normal operations, the kernel
only adds owner refs to data extents.

Thanks for the review.