sfc: fix null pointer dereference in efxhardstart_xmit
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 v5.10.146 by commit b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7, it was introduced in version v5.10 by commit 12804793b17c0e19115a90d98f2f3df0cb79e233. For more details please see the references link.