[PATCH v2 0/2] bpf, x86/unwind/orc: Support reliable unwinding through BPF stack frames

[Josh Poimboeuf <jpoimboe@kernel.org>]

Fix livepatch stalls which may be seen when a task is blocked with BPF
JIT on its kernel stack.

Changes since v1 (https://lore.kernel.org/cover.1764699074.git.jpoimboe@kernel.org):
- fix NULL ptr deref in __arch_prepare_bpf_trampoline()

Josh Poimboeuf (2):
  bpf: Add bpf_has_frame_pointer()
  x86/unwind/orc: Support reliable unwinding through BPF stack frames

 arch/x86/kernel/unwind_orc.c | 39 +++++++++++++++++++++++++-----------
 arch/x86/net/bpf_jit_comp.c  | 12 +++++++++++
 include/linux/bpf.h          |  3 +++
 kernel/bpf/core.c            | 16 +++++++++++++++
 4 files changed, 58 insertions(+), 12 deletions(-)

-- 
2.51.1