From dc6f03f26f570104a2bb03f9d1deb588026d7c75 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org> Date: Thu, 24 Jul 2014 11:26:11 -0400 Subject: ftrace: Add warning if tramp hash does not match nr_trampolines After adding all the records to the tramp_hash, add a check that makes sure that the number of records added matches the number of records expected to match and do a WARN_ON and disable ftrace if they do not match. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- kernel/trace/ftrace.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'kernel') diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 6ef1989c2b2e..979bd8cb4349 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2226,6 +2226,9 @@ static int ftrace_save_ops_tramp_hash(struct ftrace_ops *ops) } } while_for_each_ftrace_rec(); + /* The number of recs in the hash must match nr_trampolines */ + FTRACE_WARN_ON(ops->tramp_hash->count != ops->nr_trampolines); + return 0; } -- cgit v1.2.3