Re: [PATCH] selftests/ftrace: Correctly enable event in instance-event.tc

On 2023/9/6 06:36, Steven Rostedt wrote:

On Tue, 5 Sep 2023 20:54:40 +0800 Zheng Yejian zhengyejian1@huawei.com wrote:

...

Hi, Steve, Ajay,

After this patch and run this testcase, I got an use-after-free report by KASAN. Short log see [1], full logs see attach "panic.log".

And by simple bisect, I found it may be introduced by:

27152bceea1d ("eventfs: Move tracing/events to eventfs")

Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

Hi Zheng,

Can you test:

https://lore.kernel.org/all/20230905183332.628d7cc0@gandalf.local.home/

and see if it fixes the KASAN issue for you?

Hi, Steve, your new patch seems not fixes the KASAN issue.

I run the instance-event.tc with your patch again and get same KASAN report.

My config is in:

https://lore.kernel.org/all/da5495b5-cdb5-cb82-dd9b-37e7a87ed97d@huawei.com/

Thanks!

-- Steve