Re: [PATCH] ovl: fortify ovl_copy_xattr() against underlying layer modifications

On Mon, 24 Aug 2026 at 22:47, Fahad Alharbi <[email protected]> wrote:
>
> TL;DR: your patch fixes it.  On v7.2-rc6, FUSE probe LEAK -> NO LEAK, and the
> unprivileged tmpfs racer goes from 78 of 5,000,000 copy-ups leaking (5 of 5
> boots) to 0 of 5,000,000 (0 of 5 boots).  51 of 51 functional xattr checks
> unchanged.  One behaviour change worth a look: under a racing lower fs about
> 6% of copy-ups now fail with EIO.  Tested-by below.

> Tested-by: Fahad Alharbi <[email protected]>

Thanks for the detailed test and analysis.

Miklos