trace_uprobe: Use %lx to display offset

tu->offset is unsigned long, not a pointer, thus %lx should
be used to print it, not the %px.

Link: http://lkml.kernel.org/r/20180315082756.9050-1-ravi.bangoria@linux.vnet.ibm.com

Cc: stable@vger.kernel.org
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Fixes: 0e4d819d0893 ("trace_uprobe: Display correct offset in uprobe_events")
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

kernel/trace/trace_uprobe.c

@@ -608,7 +608,7 @@ static int probes_seq_show(struct seq_file *m, void *v)
 
 	/* Don't print "0x  (null)" when offset is 0 */
 	if (tu->offset) {
-		seq_printf(m, "0x%px", (void *)tu->offset);
+		seq_printf(m, "0x%0*lx", (int)(sizeof(void *) * 2), tu->offset);
 	} else {
 		switch (sizeof(void *)) {
 		case 4: