This series introduce the dynptr counterpart of the
bpf_probe_read_{kernel,user} helpers and bpf_copy_from_user helper.These helpers are helpful for reading variable-length data from kernel memory into dynptr without going through an intermediate buffer. Link: https://lore.kernel.org/bpf/meyp282mb2312cfce5f7712fde313215ac6...@meyp282mb2312.ausp282.prod.outlook.com/ Suggested-by: Andrii Nakryiko <andrii.nakry...@gmail.com> Signed-off-by: Levi Zim <rsworkt...@outlook.com> --- Levi Zim (7): bpf: Implement bpf_probe_read_kernel_dynptr helper bpf: Implement bpf_probe_read_user_dynptr helper bpf: Implement bpf_copy_from_user_dynptr helper tools headers UAPI: Update tools's copy of bpf.h header selftests/bpf: probe_read_kernel_dynptr test selftests/bpf: probe_read_user_dynptr test selftests/bpf: copy_from_user_dynptr test include/linux/bpf.h | 3 + include/uapi/linux/bpf.h | 49 ++++++++++ kernel/bpf/helpers.c | 53 ++++++++++- kernel/trace/bpf_trace.c | 72 ++++++++++++++ tools/include/uapi/linux/bpf.h | 49 ++++++++++ tools/testing/selftests/bpf/prog_tests/dynptr.c | 45 ++++++++- tools/testing/selftests/bpf/progs/dynptr_success.c | 106 +++++++++++++++++++++ 7 files changed, 374 insertions(+), 3 deletions(-) --- base-commit: d0d106a2bd21499901299160744e5fe9f4c83ddb change-id: 20250124-bpf_dynptr_probe-ab483c554f1a Best regards, -- Levi Zim <rsworkt...@outlook.com>
