[PATCH v2 0/4] bpf: Add bpf_stream_print_stack kfunc

[Emil Tsalapatis <emil@etsalapatis.com>]

Add a new bpf_stream_print_stack kfunc for printing a BPF program stack
into a BPF stream. Update the verifier to allow the new kfunc to be 
called with BPF spinlocks held, along with bpf_stream_vprintk.

Patchset spun out of the larger libarena + ASAN patchset.
(https://lore.kernel.org/bpf/20260127181610.86376-1-emil@etsalapatis.com/)

Changeset:
	- Update bpf_stream_print_stack to take stream_id arg (Kumar)
	- Added selftest for the bpf_stream_print_stack
	- Add selftest for calling the streams kfuncs under lock


v2->v1: (https://lore.kernel.org/bpf/20260202193311.446717-1-emil@etsalapatis.com/)
	- Updated Signed-off-by to be consistent with past submissions
	- Updated From email to be consistent with Signed-off-by

Cc: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>

Emil Tsalapatis (4):
  bpf: Add bpf_stream_print_stack stack dumping kfunc
  selftests/bpf: Add selftests for bpf_stream_print_stack
  bpf: Allow BPF stream kfuncs while holding a lock
  selftests/bpf: Add selftests for stream functions under lock

 kernel/bpf/helpers.c                       |  1 +
 kernel/bpf/stream.c                        | 19 ++++++++
 kernel/bpf/verifier.c                      | 13 +++++-
 tools/testing/selftests/bpf/progs/stream.c | 53 ++++++++++++++++++++++
 4 files changed, 85 insertions(+), 1 deletion(-)

-- 
2.49.0