Description: net/sched: sch_hfsc: Ensure inner classes have fsc curve
References:
 https://kernel.dance/b3d26c5702c7d6c45456326e56d2ccf3f103e60f
Notes:
 carnil> Fixed as well in 6.4.16 for 6.4.y and in 6.5.3 for 6.5.y.
Bugs:
upstream: released (6.6-rc1) [b3d26c5702c7d6c45456326e56d2ccf3f103e60f]
6.1-upstream-stable: released (6.1.53) [a1e820fc7808e42b990d224f40e9b4895503ac40]
5.10-upstream-stable: released (5.10.195) [b08cc6c0396fd5cfaac4ca044f2282367347c062]
4.19-upstream-stable: released (4.19.295) [7c62e0c3c6e9c9c15ead63339db6a0e158d22a66]
sid: released (6.5.3-1)
6.1-bookworm-security: released (6.1.55-1)
5.10-bullseye-security: released (5.10.197-1)
4.19-buster-security: released (4.19.304-1)