diff options
| -rw-r--r-- | kernel/trace/ftrace.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 90d99fb02ae..53042f118f2 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1628,8 +1628,13 @@ void ftrace_retfunc_init_task(struct task_struct *t) void ftrace_retfunc_exit_task(struct task_struct *t) { - kfree(t->ret_stack); + struct ftrace_ret_stack *ret_stack = t->ret_stack; + t->ret_stack = NULL; + /* NULL must become visible to IRQs before we free it: */ + barrier(); + + kfree(ret_stack); } #endif |