On Thu, 17 Oct 2024, Michael Vetter wrote: > The test proves that a function that is being kprobed and uses a > post_handler cannot be livepatched. > > Only one ftrace_ops with FTRACE_OPS_FL_IPMODIFY set may be registered > to any given function at a time. > > Note that the conflicting kprobe could not be created using the > tracefs interface, see Documentation/trace/kprobetrace.rst. > This interface uses only the pre_handler(), see alloc_trace_kprobe(). > But FTRACE_OPS_FL_IPMODIFY is used only when the kprobe is using a > post_handler, see arm_kprobe_ftrace(). > > Signed-off-by: Michael Vetter <mvetter@xxxxxxxx> Nice test. Reviewed-by: Miroslav Benes <mbenes@xxxxxxx> Thank you, Miroslav
