Re: [PATCH v2] ftrace: Fix possible use-after-free issue in ftrace_location()

… > To fix it, we hold rcu lock as lookuping ftrace record, and call > synchronize_rcu() before freeing any ftrace pages. I suggest to convert this description into an imperative wording. Regards, Markus

[PATCH v2] ftrace: Fix possible use-after-free issue in ftrace_location()

KASAN reports a bug: BUG: KASAN: use-after-free in ftrace_location+0x90/0x120 Read of size 8 at addr 888141d40010 by task insmod/424 CPU: 8 PID: 424 Comm: insmod Tainted: GW 6.9.0-rc2+ [...] Call Trace: dump_stack_lvl+0x68/0xa0 print_report+0xcf/0x610 ka