In the Linux kernel, the following vulnerability has been resolved: md/raid10: wait barrier before returning discard request with REQ_NOWAIT raid10_handle_discard should wait barrier before returning a discard bio which has REQ_NOWAIT. And there is no need to print warning calltrace if a discard bio has REQ_NOWAIT flag. Quality engineer usually checks dmesg and reports error if dmesg has warning/error calltrace.
https://git.kernel.org/stable/c/3db4404435397a345431b45f57876a3df133f3b4
https://git.kernel.org/stable/c/31d3156efe909b53ba174861a3da880c688f5edc