panic: munmap(7ff58ec00000, 200000)) failed: function not implemented

goroutine 1065336 [running]:
gvisor.dev/gvisor/pkg/sentry/platform/ptrace.(*subprocess).Unmap(0xc0007fe3c0, 0x7ff58ec00000, 0x200000)
	pkg/sentry/platform/ptrace/subprocess.go:628 +0x44e
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).unmapASLocked(0xc001332000, 0x7ff58ec00000, 0x7ff58ee00000)
	pkg/sentry/mm/address_space.go:215 +0xf8
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).getPMAsInternalLocked(0xc001332000, 0x13d41a0, 0xc000f24a80, 0xc001332080, 0xa, 0x7ff58ec5d000, 0x7ff58ec5e000, 0x101, 0x43eae1, 0xf0e6f0, ...)
	pkg/sentry/mm/pma.go:357 +0x2076
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).getPMAsLocked(0xc001332000, 0x13d41a0, 0xc000f24a80, 0xc001332080, 0xa, 0x7ff58ec5d000, 0x7ff58ec5e000, 0x101, 0xc001332080, 0xb, ...)
	pkg/sentry/mm/pma.go:119 +0x100
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).HandleUserFault(0xc001332000, 0x13d41a0, 0xc000f24a80, 0x7ff58ec5da28, 0x101, 0x7ff58ec5da30, 0xc000757e00, 0x100)
	pkg/sentry/mm/syscalls.go:57 +0x1ca
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000f24a80, 0x13b9440, 0x0)
	pkg/sentry/kernel/task_run.go:255 +0xcf8
DIAGNOSIS:
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-overlay-host-race-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer