fatal error: concurrent map read and map write

goroutine 476593 [running]:
runtime.throw(0xba8562, 0x21)
	GOROOT/src/runtime/panic.go:616 +0x81 fp=0xc4207f8d20 sp=0xc4207f8d00 pc=0x429441
runtime.mapaccess2_fast64(0xa9dd00, 0xc4204f82a0, 0xc4215fa1e0, 0x109e980, 0x411400)
	GOROOT/src/runtime/hashmap_fast.go:141 +0x1aa fp=0xc4207f8d48 sp=0xc4207f8d20 pc=0x409e9a
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ring0/pagetables.(*PCIDs).Drop(...)
	pkg/sentry/platform/ring0/pagetables/pcids_x86.go:91
gvisor.googlesource.com/gvisor/pkg/sentry/platform/kvm.(*machine).dropPageTables(0xc420288000, 0xc4215fa1e0)
	pkg/sentry/platform/kvm/machine_amd64.go:89 +0x11c fp=0xc4207f8e18 sp=0xc4207f8d48 pc=0x874cbc
gvisor.googlesource.com/gvisor/pkg/sentry/platform/kvm.(*addressSpace).Release(0xc421bde900)
	pkg/sentry/platform/kvm/address_space.go:287 +0x81 fp=0xc4207f8e40 sp=0xc4207f8e18 pc=0x8699f1
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).DecUsers(0xc420156580, 0xc52740, 0xc42096b0e0)
	pkg/sentry/mm/lifecycle.go:210 +0x204 fp=0xc4207f8ed0 sp=0xc4207f8e40 pc=0x684cf4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*TaskContext).release(0xc4208b0b30)
	pkg/sentry/kernel/task_context.go:64 +0xd6 fp=0xc4207f8f30 sp=0xc4207f8ed0 pc=0x6ddbe6
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0x0, 0xc4208b0400, 0xc45300, 0x0)
	pkg/sentry/kernel/task_exit.go:266 +0xc5 fp=0xc4207f8f88 sp=0xc4207f8f30 pc=0x6dfae5
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4208b0400, 0x1b67)
	pkg/sentry/kernel/task_run.go:95 +0x174 fp=0xc4207f8fd0 sp=0xc4207f8f88 pc=0x6e6f04
runtime.goexit()
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/linux_amd64_pure_stripped/stdlib~/src/runtime/asm_amd64.s:2361 +0x1 fp=0xc4207f8fd8 sp=0xc4207f8fd0 pc=0x455f31
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:258 +0x100