New bugs since last paper:

	6.7.0-rc5

	xingwei lee found
	possible deadlock in down_trylock/perf_event_open
	WARNING: CPU: 1 PID: 8266 at kernel/events/core.c:1950 __do_sys_perf_event_open0
	
	with syzcaller (perf_fuzzer found it too a few days later)
	actually trinity possibly found it even earlier

	Subject: [tip:perf/urgent] [perf]  382c27f4ed:
	    WARNING:at_kernel/events/core.c:#__do_sys_perf_event_open

	6.7.0-rc5

	added vsyscall support and perf_fuzzer found possible deadlock
	reported to Linux kernel on 13 December 2023

	[perf] vsyscall, possible circular locking dependency detected

