Commit b00f0b6d authored Mar 13, 2009 by Zhaolei Committed by Ingo Molnar Mar 13, 2009

ftrace: avoid double-free of dyn_ftrace



If dyn_ftrace is freed before ftrace_release(), ftrace_release()
will free it again and make ftrace_free_records wrong.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: "Steven Rostedt ;" <rostedt@goodmis.org>
LKML-Reference: <49BA23D9.1050900@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 62a394eb

kernel/trace/ftrace.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -356,7 +356,8 @@ void ftrace_release(void *start, unsigned long size)

		mutex_lock(&ftrace_lock);
		do_for_each_ftrace_rec(pg, rec) {
		if ((rec->ip >= s) && (rec->ip < e))
		if ((rec->ip >= s) && (rec->ip < e) &&
		!(rec->flags & FTRACE_FL_FREE))
		ftrace_free_rec(rec);
		} while_for_each_ftrace_rec();
		mutex_unlock(&ftrace_lock);