Re: [PATCH 0/1] software node: Use-after-free fix in drivers/base/swnode.c

[Andy Shevchenko]

On Tue, Feb 24, 2026 at 01:19:21PM -0600, mike.isely@xxxxxxxxxxxxxxxxx wrote:

> Correct issue in drivers/base/swnode.c that can lead to use-after-free
> due to kobject reference counting error, which itself is due to
> incorrect behavior with the "managed" struct swnode flag in
> circumstances involving child struct device instances where the parent
> struct device is managing a struct swnode.
> 
> Use-after-free in this case led to an Oops and a subsequent kernel
> memory leak, but realistically it's kernel heap corruption, so any
> manner of chaos can result, if left unaddressed.
> 
> This was detected in kernel 6.12, verified also in kernel 6.6.  Visual
> inspection in 6.19.3 source (the latest as of right now) shows the

The latest is v7.0-rc1 as of time of the topic message.

> same issue.  The nearly trivial fix was verified in 6.12.  While this
> patches against 6.19.3, IMHO this is a candidate for all LTS kernels.

Thanks for the contribution, usually for a single patch there is no need
in cover letter. The comment block can handle this (the place after cutter
'---' line in the message with a patch).

-- 
With Best Regards,
Andy Shevchenko