tracing/kprobe: Cast user-space address correctly

Cast user-space address correctly to pass to probe_user_read().
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

kernel/trace/trace_kprobe.c

@@ -955,7 +955,9 @@ probe_mem_read(void *dest, void *src, size_t size)
 static nokprobe_inline int
 probe_mem_read_user(void *dest, void *src, size_t size)
 {
-	return probe_user_read(dest, src, size);
+	const void __user *uaddr =  (__force const void __user *)src;
+
+	return probe_user_read(dest, uaddr, size);
 }
 
 /* Note that we don't verify it, since the code does not come from user space */