Re: + radix-tree-fix-kmemleak-false-positives-on-tree-head-reassignment.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

On Sun, 5 Jul 2026 11:45:04 +0100 Matthew Wilcox <willy@infradead.org> wrote:

> On Sat, Jul 04, 2026 at 07:12:40PM -0700, Andrew Morton wrote:
> > The patch titled
> >      Subject: radix-tree: fix kmemleak false positives on tree head reassignment
> > has been added to the -mm mm-new branch.  Its filename is
> >      radix-tree-fix-kmemleak-false-positives-on-tree-head-reassignment.patch
> 
> Umm.  I don't see this patch in my inbox anywhere else.  Is email broken
> again?

You weren't cc'ed on the original.  I added you.  lib/radix-tree.c has
no MAINTAINERS record!

> > This is the same race fixed for the XArray API in commit a1a029bcea59
> 
> This commit ID doesn't exist in any tree I have.
> 
> > ("XArray: fix kmemleak false positive in xas_shrink()").  The IDR uses the
> > radix tree API directly and hits it on both the grow and the shrink path,
> > so mark the new head as a transient leak in both.

https://patchew.org/linux/20250512191707.245153-1-jkangas@redhat.com/

Seems it was in mm.git for a while, I dropped it due to failures and
I don't think Jared took it further.

> > Add a matching kmemleak_transient_leak() stub to the radix tree test
> > harness so the userspace lib/radix-tree.c build keeps building.
> 
> Last time this was proposed, the suggestion was that kmemleak needed to
> be fixed.
> 
> https://lore.kernel.org/all/aCyI8T2sWlPLEYZ_@arm.com/

Great, thanks, I added a note, shall await developments.