[PATCH bpf-next v3 0/3] bpf: Check tail zero of bpf_map_info and bpf_prog_info

[Leon Hwang]

Check the tail bytes of bpf_map_info and bpf_prog_info due to padding
when getting map info and prog info via BPF_OBJ_GET_INFO_BY_FD, which
was discussed in the thread
"bpf: Check tail zero of bpf_common_attr using offsetofend" [1].

Links:
[1] https://lore.kernel.org/bpf/20260518145446.6794-2-leon.hwang@xxxxxxxxx/

Changes:
v2 -> v3:
* Add "__u32 :32" to bpf_map_info and bpf_prog_info (per Alexei).
* v2: https://lore.kernel.org/bpf/20260604150505.99129-1-leon.hwang@xxxxxxxxx/

v1 -> v2:
* Collect Acked-by tags from Mykyta, thanks.
* Update Fixes tag in patch #2 (per bot+bpf-ci)
* v1: https://lore.kernel.org/bpf/20260603144518.67065-1-leon.hwang@xxxxxxxxx/

Leon Hwang (3):
  bpf: Check tail zero of bpf_map_info
  bpf: Check tail zero of bpf_prog_info
  selftests/bpf: Add tests to verify checking padding bytes for
    bpf_[map,prog]_info

 include/uapi/linux/bpf.h                      |  2 +
 kernel/bpf/syscall.c                          | 10 ++--
 tools/include/uapi/linux/bpf.h                |  2 +
 .../selftests/bpf/prog_tests/bpf_attr_size.c  | 55 +++++++++++++++++++
 4 files changed, 65 insertions(+), 4 deletions(-)

-- 
2.54.0