On Wed, Dec 03, 2025 at 07:32:14PM -0800, Josh Poimboeuf wrote:
> 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/[email protected]):
> - 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
>
tried with bpftrace and it seems to go over bpf_prog properly
in this case:
bpf_prog_2beb79c650d605dd_fentry_bpf_testmod_bpf_kfunc_common_test_1+320
bpf_trampoline_354334973728+60
bpf_kfunc_common_test+9
bpf_prog_f837cdd29a0519b9_test1+25
trace_call_bpf+345
kprobe_perf_func+76
aggr_pre_handler+72
kprobe_ftrace_handler+361
drm_core_init+202
bpf_fentry_test1+9
bpf_prog_test_run_tracing+357
__sys_bpf+2263
__x64_sys_bpf+33
do_syscall_64+134
entry_SYSCALL_64_after_hwframe+118
Reviewed-by: Jiri Olsa <[email protected]>
thanks,
jirka
