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

Daniel Borkmann says:

====================
pull-request: bpf-next 2023-08-25

We've added 87 non-merge commits during the last 8 day(s) which contain
a total of 104 files changed, 3719 insertions(+), 4212 deletions(-).

The main changes are:

1) Add multi uprobe BPF links for attaching multiple uprobes
   and usdt probes, which is significantly faster and saves extra fds,
   from Jiri Olsa.

2) Add support BPF cpu v4 instructions for arm64 JIT compiler,
   from Xu Kuohai.

3) Add support BPF cpu v4 instructions for riscv64 JIT compiler,
   from Pu Lehui.

4) Fix LWT BPF xmit hooks wrt their return values where propagating
   the result from skb_do_redirect() would trigger a use-after-free,
   from Yan Zhai.

5) Fix a BPF verifier issue related to bpf_kptr_xchg() with local kptr
   where the map's value kptr type and locally allocated obj type
   mismatch, from Yonghong Song.

6) Fix BPF verifier's check_func_arg_reg_off() function wrt graph
   root/node which bypassed reg->off == 0 enforcement,
   from Kumar Kartikeya Dwivedi.

7) Lift BPF verifier restriction in networking BPF programs to treat
   comparison of packet pointers not as a pointer leak,
   from Yafang Shao.

8) Remove unmaintained XDP BPF samples as they are maintained
   in xdp-tools repository out of tree, from Toke Høiland-Jørgensen.

9) Batch of fixes for the tracing programs from BPF samples in order
   to make them more libbpf-aware, from Daniel T. Lee.

10) Fix a libbpf signedness determination bug in the CO-RE relocation
    handling logic, from Andrii Nakryiko.

11) Extend libbpf to support CO-RE kfunc relocations. Also follow-up
    fixes for bpf_refcount shared ownership implementation,
    both from Dave Marchevsky.

12) Add a new bpf_object__unpin() API function to libbpf,
    from Daniel Xu.

13) Fix a memory leak in libbpf to also free btf_vmlinux
    when the bpf_object gets closed, from Hao Luo.

14) Small error output improvements to test_bpf module, from Helge Deller.

* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (87 commits)
  selftests/bpf: Add tests for rbtree API interaction in sleepable progs
  bpf: Allow bpf_spin_{lock,unlock} in sleepable progs
  bpf: Consider non-owning refs to refcounted nodes RCU protected
  bpf: Reenable bpf_refcount_acquire
  bpf: Use bpf_mem_free_rcu when bpf_obj_dropping refcounted nodes
  bpf: Consider non-owning refs trusted
  bpf: Ensure kptr_struct_meta is non-NULL for collection insert and refcount_acquire
  selftests/bpf: Enable cpu v4 tests for RV64
  riscv, bpf: Support unconditional bswap insn
  riscv, bpf: Support signed div/mod insns
  riscv, bpf: Support 32-bit offset jmp insn
  riscv, bpf: Support sign-extension mov insns
  riscv, bpf: Support sign-extension load insns
  riscv, bpf: Fix missing exception handling and redundant zext for LDX_B/H/W
  samples/bpf: Add note to README about the XDP utilities moved to xdp-tools
  samples/bpf: Cleanup .gitignore
  samples/bpf: Remove the xdp_sample_pkts utility
  samples/bpf: Remove the xdp1 and xdp2 utilities
  samples/bpf: Remove the xdp_rxq_info utility
  samples/bpf: Remove the xdp_redirect* utilities
  ...
====================

Link: https://lore.kernel.org/r/20230825194319.12727-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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