Description: misc: fastrpc: restrict user apps from sending kernel RPC messages
References:
 https://lore.kernel.org/stable/YD03ew7+6v0XPh6l@kroah.com/
Notes:
Bugs:
upstream: released (5.12-rc3) [20c40794eb85ea29852d7bc37c55713802a543d6]
5.10-upstream-stable: released (5.10.24) [52feb58f9b5b078b5a39ed8ba8ab3b4546e16ff2]
4.19-upstream-stable: N/A "Vulnerable code introduced later"
4.9-upstream-stable: N/A "Vulnerable code introduced later"
sid: released (5.10.24-1)
4.19-buster-security: N/A "Vulnerable code introduced later"
4.9-stretch-security: N/A "Vulnerable code introduced later"