Re: [PATCH] packet: Improve exception handling in fanout_add()

[Willem de Bruijn]

Markus Elfring wrote:
> From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
> Date: Sun, 31 Dec 2023 16:30:51 +0100
> 
> The kfree() function was called in some cases by the fanout_add() function
> even if the passed variable contained a null pointer.
> This issue was detected by using the Coccinelle software.

It is fine to call kfree with a possible NULL pointer:

	/**
	 * kfree - free previously allocated memory
	 * @object: pointer returned by kmalloc() or kmem_cache_alloc()
	 *
	 * If @object is NULL, no operation is performed.
	 */
	void kfree(const void *object)