Is it possible for you to generate kernel patch only with **kernel log** for 'use-after-free' case? With kernel log, we only have limited information, so it is hard to debug 'use-after-free' case with this signature.
For this matter, kernel should be compiled with below config. CONFIG_SLUB_DEBUG=y CONFIG_SLUB_DEBUG_ON=y
2019년 8월 7일 (수) 오후 9:56, Thomas Gleixner tglx@linutronix.de님이 작성:
On Wed, 7 Aug 2019, Austin Kim wrote:
A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?
A: No. Q: Should I include quotations after my reply?
http://daringfireball.net/2007/07/on_top
I wonder what kinds of workqueue is used in case of this panic.
If system workqueue(system_wq) is used for this case, it would be a help to replace it with high priority workqueue(system_highpri_wq). If panic disappers with high priority workqueue(system_highpri_wq), we would think about another scenario.
How would that help? As Sebastian explained, something overwrote memory or it is a Use After Free. How would a high priority workqueue 'fix' that?
You need to find the root cause, which is either memory corruption or a use after free.
Thanks,
tglx