Cross-merge networking fixes after downstream PR.

Conflicts:

include/linux/filter.h
kernel/bpf/core.c
  66e13b61 ("bpf: verifier: prevent userspace memory access")
  d503a04f ("bpf: Add support for certain atomics in bpf_arena to x86 JIT")
https://lore.kernel.org/all/20240429114939.210328b0@canb.auug.org.au/



No adjacent changes.

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