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

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Message-ID: <cover.1764818927.git.jpoimboe@kernel.org>
Date: Wed,  3 Dec 2025 19:32:14 -0800
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	live-patching@...r.kernel.org,
	bpf@...r.kernel.org,
	Andrey Grodzovsky <andrey.grodzovsky@...wdstrike.com>,
	Petr Mladek <pmladek@...e.com>,
	Song Liu <song@...nel.org>,
	Raja Khan <raja.khan@...wdstrike.com>,
	Miroslav Benes <mbenes@...e.cz>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v2 0/2] bpf, x86/unwind/orc: Support reliable unwinding through BPF stack frames

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