pull-request: bpf 2022-11-11

[Andrii Nakryiko <andrii@kernel.org>]

Hi David, hi Jakub, hi Paolo, hi Eric,

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

We've added 11 non-merge commits during the last 8 day(s) which contain
a total of 11 files changed, 83 insertions(+), 74 deletions(-).

The main changes are:

1) Fix strncpy_from_kernel_nofault() to prevent out-of-bounds writes,
   from Alban Crequy.

2) Fix for bpf_prog_test_run_skb() to prevent wrong alignment,
   from Baisong Zhong.

3) Switch BPF_DISPATCHER to static_call() instead of ftrace infra, with
   a small build fix on top, from Peter Zijlstra and Nathan Chancellor.

4) Fix memory leak in BPF verifier in some error cases, from Wang Yufen.

5) 32-bit compilation error fixes for BPF selftests, from Pu Lehui and
   Yang Jihong.

6) Ensure even distribution of per-CPU free list elements, from Xu Kuohai.

7) Fix copy_map_value() to track special zeroed out areas properly,
   from Xu Kuohai.

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:

Andrew Morton, Björn Töpel, David Laight, Francis Laniel, Jiri Olsa, 
"kernelci.org bot", kernel test robot, Kumar Kartikeya Dwivedi, Yonghong 
Song

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

The following changes since commit 1118b2049d77ca0b505775fc1a8d1909cf19a7ec:

  net: tun: Fix memory leaks of napi_get_frags (2022-11-04 10:56:22 +0000)

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 1f6e04a1c7b85da3b765ca9f46029e5d1826d839:

  bpf: Fix offset calculation error in __copy_map_value and zero_map_value (2022-11-11 12:35:07 -0800)

----------------------------------------------------------------
Alban Crequy (2):
      maccess: Fix writing offset in case of fault in strncpy_from_kernel_nofault()
      selftests: bpf: Add a test when bpf_probe_read_kernel_str() returns EFAULT

Andrii Nakryiko (1):
      Merge branch 'Fix offset when fault occurs in strncpy_from_kernel_nofault()'

Baisong Zhong (1):
      bpf, test_run: Fix alignment problem in bpf_prog_test_run_skb()

Nathan Chancellor (1):
      bpf: Add explicit cast to 'void *' for __BPF_DISPATCHER_UPDATE()

Peter Zijlstra (2):
      bpf: Revert ("Fix dispatcher patchable function entry to 5 bytes nop")
      bpf: Convert BPF_DISPATCHER to use static_call() (not ftrace)

Pu Lehui (1):
      selftests/bpf: Fix casting error when cross-compiling test_verifier for 32-bit platforms

Wang Yufen (1):
      bpf: Fix memory leaks in __check_func_call

Xu Kuohai (2):
      bpf: Initialize same number of free nodes for each pcpu_freelist
      bpf: Fix offset calculation error in __copy_map_value and zero_map_value

Yang Jihong (1):
      selftests/bpf: Fix test_progs compilation failure in 32-bit arch

 arch/x86/net/bpf_jit_comp.c                     | 13 ------
 include/linux/bpf.h                             | 60 ++++++++++++++++---------
 kernel/bpf/dispatcher.c                         | 28 ++++--------
 kernel/bpf/percpu_freelist.c                    | 23 +++++-----
 kernel/bpf/verifier.c                           | 14 +++---
 mm/maccess.c                                    |  2 +-
 net/bpf/test_run.c                              |  1 +
 tools/testing/selftests/bpf/prog_tests/varlen.c |  7 +++
 tools/testing/selftests/bpf/progs/test_varlen.c |  5 +++
 tools/testing/selftests/bpf/test_progs.c        |  2 +-
 tools/testing/selftests/bpf/test_verifier.c     |  2 +-
 11 files changed, 83 insertions(+), 74 deletions(-)