Re: Warnings and errors in drm_mode_config_cleanup when booting 6.19.10 and 7.0-rc5

[Greg KH <gregkh@linuxfoundation.org>]

On Sat, Mar 28, 2026 at 11:52:48AM +0100, Thorsten Leemhuis wrote:
> Matt, thx for the report.
> 
> On 3/28/26 11:30, Matt Fagnani wrote:
> > I could try to bisect. The commit
> > e493c135980f90c20308d1a98f2e0d1223951e94 drm: Fix use-after-free on
> > framebuffers and property blobs when calling drm_dev_unplug was included
> > in 6.19.10 and changed drm_mode_config_cleanup https://git.kernel.org/
> > pub/scm/linux/kernel/git/stable/linux.git/commit/?
> > h=linux-6.19.y&id=e493c135980f90c20308d1a98f2e0d1223951e94
> 
> Did a quick search. Turns out this is mainline commit 6bee098b914176
> ("drm: Fix use-after-free on framebuffers and property blobs when
> calling drm_dev_unplug") -- and when searching for that (FWIW, this is
> not widely known, but that is really helpful in case like this, as the
> mainline commit id is way more relevant) is turns out that is in the
> process of getting reverted:
> 
> See https://lore.kernel.org/all/20260326082217.39941-2-dev@lankhorst.se/
> or 45ebe43ea00d6b ("Revert "drm: Fix use-after-free on framebuffers and
> property blobs when calling drm_dev_unplug"") [next-20260327
> (pending-fixes)].
> 
> Sasha and Greg: you might want to make sure to pick this up.

When it shows up in a Linus-released kernel, can someone remind us?

thanks,

greg k-h