Merge branch 'net-sched-two-fixes-for-cls_u32'

Eric Dumazet says:

====================
net/sched: two fixes for cls_u32

One syzbot report brought my attention to cls_u32.

This series addresses the syzbot report, and an additional
issue discovered in code review.
====================

Link: https://lore.kernel.org/r/20220413173542.533060-1-eric.dumazet@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>