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-rw-r--r--kernel/trace/ftrace.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index eda69c9..6ef1989 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2208,6 +2208,14 @@ static int ftrace_save_ops_tramp_hash(struct ftrace_ops *ops)
if (ftrace_rec_count(rec) == 1 &&
ftrace_ops_test(ops, rec->ip, rec)) {
+ /*
+ * If another ops adds to a rec, the rec will
+ * lose its trampoline and never get it back
+ * until all ops are off of it.
+ */
+ if (!(rec->flags & FTRACE_FL_TRAMP))
+ continue;
+
/* This record had better have a trampoline */
if (FTRACE_WARN_ON(!(rec->flags & FTRACE_FL_TRAMP_EN)))
return -1;
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