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>

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index ff14eb011c1c982a904479a543994dca3df83014..2c5357dddb9202d00bfc4634dcbf0b75401c1bfd 100644 (file)
--- a/kernel/trace/trace_kprobe.c
+++ b/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 */