signal: use kill_proc_info instead of kill_pid_info in kill_something_info

signal.c provides kill_proc_info, we can use it instead of kill_pid_info
in kill_something_info func gracefully.

Signed-off-by: Zhiqiang Liu <[email protected]>
Acked-by: Oleg Nesterov <[email protected]>
Acked-by: Christian Brauner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Brauner <[email protected]>

Author: ZhiqiangLiu26

kernel/signal.c

@@ -1557,12 +1557,8 @@ static int kill_something_info(int sig, struct kernel_siginfo *info, pid_t pid)
 {
 	int ret;
 
-	if (pid > 0) {
-		rcu_read_lock();
-		ret = kill_pid_info(sig, info, find_vpid(pid));
-		rcu_read_unlock();
-		return ret;
-	}
+	if (pid > 0)
+		return kill_proc_info(sig, info, pid);
 
 	/* -INT_MIN is undefined.  Exclude this case to avoid a UBSAN warning */
 	if (pid == INT_MIN)