Re: [PATCH v2 2/4] fprobe: make fprobe_kprobe_handler recursion free

Peter Zijlstra
2023-05-16T09:18:38Z

On Tue, May 16, 2023 at 03:18:28PM +0800, Ze Gao wrote:
> Current implementation calls kprobe related functions before doing
> ftrace recursion check in fprobe_kprobe_handler, which opens door
> to kernel crash due to stack recursion if preempt_count_{add, sub}
> is traceable.

Which preempt_count*() are you referring to? The ones you just made
_notrace in the previous patch?