Try this, and you'll see NULL pointer dereference bug:
# echo -n 'parent_comm ==' > sched/sched_process_fork/filter
Because we passed NULL ptr to simple_strtoull().
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <
49E04C43.
1050504@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
}
}
+ if (!val_str) {
+ pred->field_name = NULL;
+ return -EINVAL;
+ }
+
pred->field_name = kstrdup(pred->field_name, GFP_KERNEL);
if (!pred->field_name)
return -ENOMEM;