Steven Rostedt <rostedt@xxxxxxxxxxx> writes: > On Wed, 16 Feb 2022 13:54:19 -0500 > Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > >> That is, shutdown is called, the item is removed from the list and freed, >> but something got preempted while on the ftrace trampoline, with a >> reference to the item, and then woke up and executed the item that was >> freed. >> >> I'll look into it. Thanks for the report. > > OK, I wonder if something changed with "is_kernel_core_date()"? > > Because on registering, we have: > > if (!is_kernel_core_data((unsigned long)ops)) > ops->flags |= FTRACE_OPS_FL_DYNAMIC; I checked, and the flag gets set here. I cannot say whether it is also set when the system crashes, but i would expect it.
