Re: [PATCH net] net/mlx5: HWS, fix matcher leak on resize target setup failure

[Paolo Abeni]

On 6/29/26 8:40 AM, Dawei Feng wrote:
> hws_bwc_matcher_move() allocates a replacement matcher before setting it
> as the resize target. If mlx5hws_matcher_resize_set_target() fails, the
> replacement matcher is not attached anywhere and is leaked.
> 
> Fix the leak by destroying the replacement matcher before returning from
> the resize-target failure path.
> 
> The bug was first flagged by an experimental analysis tool we are
> developing for kernel memory-management bugs while analyzing
> v6.13-rc1. The tool is still under development and is not yet publicly
> available. Manual inspection confirms that the bug is still
> present in v7.1.1.
> 
> An x86_64 allyesconfig build showed no new warnings. As we do not have a
> mlx5 HWS-capable device to test with, no runtime testing was able to be
> performed.
> 
> Fixes: 2111bb970c78 ("net/mlx5: HWS, added backward-compatible API handling")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Dawei Feng <dawei.feng@xxxxxxxxxx>

@nvidia team, double checking I did not miss any relevant communication.
The last process update I recall is that one of the people listed in
maintainer file will ack patches for us to merge directly into the
net/net-next trees.

Should we consider any ack from @nvidia sufficient to take over?

Thanks,

Paolo