[PATCH bpf-next v3 0/3] Introduce kfuncs for memory reads into dynptrs

[Mykyta Yatsenko <mykyta.yatsenko5@xxxxxxxxx>]

From: Mykyta Yatsenko <yatsenko@xxxxxxxx>

This patch adds new kfuncs that enable reading variable-length
user or kernel data directly into dynptrs.
These kfuncs provide a way to perform dynamically-sized reads
while maintaining memory safety. Unlike existing
`bpf_probe_read_{user|kernel}` APIs, which are limited to constant-sized
reads, these new kfuncs allow for more flexible data access.

Mykyta Yatsenko (3):
  helpers: make few bpf helpers public
  bpf: implement dynptr copy kfuncs
  selftests/bpf: introduce tests for dynptr copy kfuncs

 include/linux/bpf.h                           |  14 ++
 kernel/bpf/helpers.c                          |  22 +-
 kernel/trace/bpf_trace.c                      | 193 ++++++++++++++++
 tools/testing/selftests/bpf/DENYLIST          |   1 +
 .../testing/selftests/bpf/prog_tests/dynptr.c |  13 ++
 .../selftests/bpf/progs/dynptr_success.c      | 218 ++++++++++++++++++
 6 files changed, 449 insertions(+), 12 deletions(-)

-- 
2.49.0