Prohibit probing on optprobe template code, since it is not a code but a template instruction sequence. If we modify this template, copied template must be broken.
Signed-off-by: Masami Hiramatsu mhiramat@kernel.org Fixes: 9326638cbee2 ("kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation") --- arch/x86/kernel/kprobes/opt.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c index 6adf6e6c2933..544bd41a514c 100644 --- a/arch/x86/kernel/kprobes/opt.c +++ b/arch/x86/kernel/kprobes/opt.c @@ -141,6 +141,11 @@ asm (
void optprobe_template_func(void); STACK_FRAME_NON_STANDARD(optprobe_template_func); +NOKPROBE_SYMBOL(optprobe_template_func); +NOKPROBE_SYMBOL(optprobe_template_entry); +NOKPROBE_SYMBOL(optprobe_template_val); +NOKPROBE_SYMBOL(optprobe_template_call); +NOKPROBE_SYMBOL(optprobe_template_end);
#define TMPL_MOVE_IDX \ ((long)optprobe_template_val - (long)optprobe_template_entry)