--- zzzz-none-000/linux-5.4.213/kernel/signal.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/kernel/signal.c	2024-08-14 09:02:11.000000000 +0000
@@ -1281,6 +1281,14 @@
 	return send_signal(sig, info, p, PIDTYPE_TGID);
 }
 
+static bool sig_debug;
+static int __init sig_debug_setup(char *__unused)
+{
+	sig_debug = true;
+	return 1;
+}
+__setup("sig_debug", sig_debug_setup);
+
 int do_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p,
 			enum pid_type type)
 {
@@ -1288,6 +1296,9 @@
 	int ret = -ESRCH;
 
 	if (lock_task_sighand(p, &flags)) {
+		if ((sig_debug && (sig == SIGKILL || sig == SIGTERM || sig == SIGINT)))
+			pr_info("The process %d: %s sending signal %d to the process %d: %s\n",
+					task_pid_nr(current), current->comm, sig,p->pid, p->comm);
 		ret = send_signal(sig, info, p, type);
 		unlock_task_sighand(p, &flags);
 	}