This ensures that any RCU readers traversing the instance list have finished, before releasing the reference on the tracer that the instance points to.
Suggested-by: Steven Rostedt <[email protected]> Signed-off-by: Crystal Wood <[email protected]> --- kernel/trace/trace_osnoise.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c index 5e83c4f6f2b4..0e1265acd1cc 100644 --- a/kernel/trace/trace_osnoise.c +++ b/kernel/trace/trace_osnoise.c @@ -179,7 +179,9 @@ static void osnoise_unregister_instance(struct trace_array *tr) if (!found) return; - kvfree_rcu_mightsleep(inst); + /* Do a full sync to ensure that tr remains valid, not just inst */ + synchronize_rcu(); + kvfree(inst); } /* -- 2.54.0
