pull-request: bpf 2022-03-29

[Alexei Starovoitov <alexei.starovoitov@gmail.com>]

Hi David, hi Jakub,

The following pull-request contains BPF updates for your *net* tree.

We've added 16 non-merge commits during the last 1 day(s) which contain
a total of 24 files changed, 354 insertions(+), 187 deletions(-).

The main changes are:

1) x86 specific bits of fprobe/rethook, from Masami and Peter.

2) ice/xsk fixes, from Maciej and Magnus.

3) Various small fixes, from Andrii, Yonghong, Geliang and others.

Please consider pulling these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git

Thanks a lot!

Also thanks to reporters, reviewers and testers of commits in this pull-request:

Arnaldo Carvalho de Melo, Dan Carpenter, Jiri Olsa, kernel test robot, 
KP Singh, Martin KaFai Lau, Masami Hiramatsu, Quentin Monnet, Yonghong 
Song

----------------------------------------------------------------

The following changes since commit d717e4cae0fe77e10a27e8545a967b8c379873ac:

  Merge tag 'net-5.18-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net (2022-03-28 17:02:04 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git 

for you to fetch changes up to ccaff3d56acc47c257a99b2807b7c78a9467cf09:

  selftests/bpf: Fix clang compilation errors (2022-03-28 20:00:11 -0700)

----------------------------------------------------------------
Alexei Starovoitov (3):
      Merge branch 'fprobe: Fixes for Sparse and Smatch warnings'
      Merge branch 'kprobes: rethook: x86: Replace kretprobe trampoline with rethook'
      Merge branch 'xsk: another round of fixes'

Andrii Nakryiko (1):
      selftests/bpf: fix selftest after random: Urandom_read tracepoint removal

Geliang Tang (1):
      bpf: Sync comments for bpf_get_stack

Jiri Olsa (1):
      bpftool: Fix generated code in codegen_asserts

Maciej Fijalkowski (2):
      ice: xsk: Stop Rx processing when ntc catches ntu
      ice: xsk: Fix indexing in ice_tx_xsk_pool()

Magnus Karlsson (2):
      xsk: Do not write NULL in SW ring at allocation failure
      ice: xsk: Eliminate unnecessary loop iteration

Masami Hiramatsu (5):
      fprobe: Fix smatch type mismatch warning
      fprobe: Fix sparse warning for acccessing __rcu ftrace_hash
      kprobes: Use rethook for kretprobe if possible
      x86,rethook,kprobes: Replace kretprobe with rethook on x86
      x86,kprobes: Fix optprobe trampoline to generate complete pt_regs

Milan Landaverde (1):
      bpf/bpftool: Add unprivileged_bpf_disabled check against value of 2

Peter Zijlstra (1):
      x86,rethook: Fix arch_rethook_trampoline() to generate a complete pt_regs

Yonghong Song (1):
      selftests/bpf: Fix clang compilation errors

Yuntao Wang (1):
      bpf: Fix maximum permitted number of arguments check

 arch/Kconfig                                       |   8 +-
 arch/x86/Kconfig                                   |   1 +
 arch/x86/include/asm/unwind.h                      |  23 ++--
 arch/x86/kernel/Makefile                           |   1 +
 arch/x86/kernel/kprobes/common.h                   |   1 +
 arch/x86/kernel/kprobes/core.c                     | 107 -----------------
 arch/x86/kernel/kprobes/opt.c                      |  25 ++--
 arch/x86/kernel/rethook.c                          | 127 +++++++++++++++++++++
 arch/x86/kernel/unwind_orc.c                       |  10 +-
 drivers/net/ethernet/intel/ice/ice.h               |   2 +-
 drivers/net/ethernet/intel/ice/ice_xsk.c           |   5 +-
 include/linux/kprobes.h                            |  51 ++++++++-
 kernel/Makefile                                    |   1 +
 kernel/bpf/btf.c                                   |   2 +-
 kernel/kprobes.c                                   | 124 ++++++++++++++++----
 kernel/trace/fprobe.c                              |   8 +-
 kernel/trace/trace_kprobe.c                        |   4 +-
 net/xdp/xsk_buff_pool.c                            |   8 +-
 tools/bpf/bpftool/feature.c                        |   5 +-
 tools/bpf/bpftool/gen.c                            |   2 +-
 tools/include/uapi/linux/bpf.h                     |   8 +-
 .../selftests/bpf/prog_tests/get_stack_raw_tp.c    |   3 -
 .../selftests/bpf/progs/test_stacktrace_build_id.c |  12 +-
 tools/testing/selftests/bpf/test_lpm_map.c         |   3 +-
 24 files changed, 354 insertions(+), 187 deletions(-)
 create mode 100644 arch/x86/kernel/rethook.c