Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Merge tag 'for-netdev' of https://git./linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2023-10-11

We've added 14 non-merge commits during the last 5 day(s) which contain
a total of 12 files changed, 398 insertions(+), 104 deletions(-).

The main changes are:

1) Fix s390 JIT backchain issues in the trampoline code generation which
   previously clobbered the caller's backchain, from Ilya Leoshkevich.

2) Fix zero-size allocation warning in xsk sockets when the configured
   ring size was close to SIZE_MAX, from Andrew Kanner.

3) Fixes for bpf_mprog API that were found when implementing support
   in the ebpf-go library along with selftests, from Daniel Borkmann
   and Lorenz Bauer.

4) Fix riscv JIT to properly sign-extend the return register in programs.
   This fixes various test_progs selftests on riscv, from Björn Töpel.

5) Fix verifier log for async callback return values where the allowed
   range was displayed incorrectly, from David Vernet.

* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  s390/bpf: Fix unwinding past the trampoline
  s390/bpf: Fix clobbering the caller's backchain in the trampoline
  selftests/bpf: Add testcase for async callback return value failure
  bpf: Fix verifier log for async callback return values
  xdp: Fix zero-size allocation warning in xskq_create()
  riscv, bpf: Track both a0 (RISC-V ABI) and a5 (BPF) return values
  riscv, bpf: Sign-extend return values
  selftests/bpf: Make seen_tc* variable tests more robust
  selftests/bpf: Test query on empty mprog and pass revision into attach
  selftests/bpf: Adapt assert_mprog_count to always expect 0 count
  selftests/bpf: Test bpf_mprog query API via libbpf and raw syscall
  bpf: Refuse unused attributes in bpf_prog_{attach,detach}
  bpf: Handle bpf_mprog_query with NULL entry
  bpf: Fix BPF_PROG_QUERY last field check
====================

Link: https://lore.kernel.org/r/20231010223610.3984-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>