net: ipv6: ensure we call ipv6_mc_down() at most once
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.16.13 by commit 72124e65a70b84e6303a5cd21b0ac1f27d7d61a4, it was introduced in version v3.18 by commit 3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36. For more details please see the references link.