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

Willem de Bruijn
2023-12-31T21:45:34Z

Markus Elfring wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> 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)