Re: [PATCH v7 1/3] i2c: mux: Fix channel node leak on adapter add failure

[Peter Rosin <peda@lysator.liu.se>]

Den Sun, Aug 23, 2026 at 09:34:36AM -0700, skrev Ahmad Byagowi:
> i2c_mux_add_adapter() takes a reference to the Device Tree channel node
> before registering the new adapter. If adapter registration fails, the
> error path frees the private data without dropping that reference.
> 
> Release the channel node before freeing the private data.
> 
> Fixes: bc45449b1444 ("i2c/of: Automatically populate i2c mux busses from device tree data.")
> Signed-off-by: Ahmad Byagowi <ahmadexp@gmail.com>

Acked-by: Peter Rosin <peda@lysator.liu.se>

Cheers,
Peter

> ---
>  drivers/i2c/i2c-mux.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c
> index 681a201c239b..68a4c34b5987 100644
> --- a/drivers/i2c/i2c-mux.c
> +++ b/drivers/i2c/i2c-mux.c
> @@ -408,6 +408,7 @@ int i2c_mux_add_adapter(struct i2c_mux_core *muxc,
>  	return 0;
>  
>  err_free_priv:
> +	of_node_put(priv->adap.dev.of_node);
>  	kfree(priv);
>  	return ret;
>  }
> -- 
> 2.50.1 (Apple Git-155)
>