WARNING: DATA RACE
Write at 0x00c00085f248 by goroutine 716:
  sync/atomic.CompareAndSwapInt32()
      bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/linux_amd64_static_race_stripped/stdlib%/src/runtime/race_amd64.s:293 +0xb
  sync.(*Mutex).Lock()
      GOROOT/src/sync/mutex.go:74 +0x4d
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Shm).RemoveMapping()
      pkg/sentry/kernel/shm/shm.go:421 +0x47
  gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).removeVMAsLocked()
      pkg/sentry/mm/vma.go:371 +0x51a
  gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).unmapLocked()
      pkg/sentry/mm/vma.go:346 +0x8b
DIAGNOSIS:
I0314 15:10:00.212455   31394 x:0] ***************************
I0314 15:10:00.212648   31394 x:0] Args: [/syzkaller/managers/kvm-direct-overlay-host-race/current/image -root /syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=exclusive -overlay -network=host debug -stacks ci-gvisor-kvm-direct-overlay-host-race-0]
I0314 15:10:00.212727   31394 x:0] Git Revision: 2512cc561778b096459182b531eae4e0797e4ec5
I0314 15:10:00.212758   31394 x:0] PID: 31394
I0314 15:10:00.212787   31394 x:0] UID: 0, GID: 0
I0314 15:10:00.212902   31394 x:0] Configuration:
I0314 15:10:00.212944   31394 x:0] 		RootDir: /syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root
I0314 15:10:00.213008   31394 x:0] 		Platform: ptrace
I0314 15:10:00.213074   31394 x:0] 		FileAccess: exclusive, overlay: true
I0314 15:10:00.213117   31394 x:0] 		Network: host, logging: false
I0314 15:10:00.213165   31394 x:0] 		Strace: false, max size: 1024, syscalls: []
I0314 15:10:00.213205   31394 x:0] ***************************
D0314 15:10:00.213287   31394 x:0] Load container "/syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-kvm-direct-overlay-host-race-0"
D0314 15:10:00.224194   31394 x:0] Signal container "ci-gvisor-kvm-direct-overlay-host-race-0": signal 0
D0314 15:10:00.224437   31394 x:0] Signal sandbox "ci-gvisor-kvm-direct-overlay-host-race-0"
D0314 15:10:00.224630   31394 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-overlay-host-race-0"
D0314 15:10:00.225630   31394 x:0] urpc: successfully marshalled 120 bytes.
D0314 15:10:00.227728   31394 x:0] urpc: unmarshal success.
I0314 15:10:00.227983   31394 x:0] Found sandbox "ci-gvisor-kvm-direct-overlay-host-race-0", PID: 1123
I0314 15:10:00.228051   31394 x:0] Retrieving sandbox stacks
D0314 15:10:00.228074   31394 x:0] Stacks sandbox "ci-gvisor-kvm-direct-overlay-host-race-0"
D0314 15:10:00.228173   31394 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-overlay-host-race-0"
D0314 15:10:00.228614   31394 x:0] urpc: successfully marshalled 36 bytes.
D0314 15:10:00.659105   31394 x:0] urpc: unmarshal success.
I0314 15:10:00.663002   31394 x:0]      *** Stack dump ***
goroutine 2007521 [running]:
gvisor.googlesource.com/gvisor/pkg/log.Stacks(0x45c001, 0xc000109140, 0xc001585e30, 0xc00017ce00)
	pkg/log/log.go:259 +0xb6
gvisor.googlesource.com/gvisor/runsc/boot.(*debug).Stacks(0x2388a78, 0x2388a78, 0xc00012b800, 0x0, 0x0)
	runsc/boot/debug.go:26 +0x38
reflect.Value.call(0xc000109140, 0xc0000101a8, 0x13, 0x10f8a85, 0x4, 0xc001239eb8, 0x3, 0x3, 0x4a765e, 0xfae420, ...)
	GOROOT/src/reflect/value.go:447 +0x63f
reflect.Value.Call(0xc000109140, 0xc0000101a8, 0x13, 0xc001239eb8, 0x3, 0x3, 0x0, 0x2388a78, 0x16)
	GOROOT/src/reflect/value.go:308 +0xc1
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).handleOne(0xc0002ba150, 0xc003f318c0, 0x0, 0x0)
	pkg/urpc/urpc.go:325 +0x63f
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).handleRegistered(0xc0002ba150, 0xc003f318c0, 0xc0002ba150, 0xc003f318c0)
	pkg/urpc/urpc.go:420 +0x43
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).StartHandling.func1(0xc0002ba150, 0xc003f318c0)
	pkg/urpc/urpc.go:440 +0x77
created by gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).StartHandling
	pkg/urpc/urpc.go:438 +0x6f

goroutine 1 [semacquire, 29 minutes]:
sync.runtime_Semacquire(0xc00014d1b4)
	GOROOT/src/runtime/sema.go:56 +0x39
sync.(*WaitGroup).Wait(0xc00014d1b4)
	GOROOT/src/sync/waitgroup.go:130 +0xb2
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Kernel).WaitExited(...)
	pkg/sentry/kernel/kernel.go:813
gvisor.googlesource.com/gvisor/runsc/boot.(*Loader).WaitExit(0xc00026c8c0, 0x0, 0x0)
	runsc/boot/loader.go:757 +0x74
gvisor.googlesource.com/gvisor/runsc/cmd.(*Boot).Execute(0xc00026a1b0, 0x1280100, 0xc00013c010, 0xc000142ae0, 0xc0001c30e0, 0x2, 0x2, 0x0)
	runsc/cmd/boot.go:236 +0x1191
github.com/google/subcommands.(*Commander).Execute(0xc000148000, 0x1280100, 0xc00013c010, 0xc0001c30e0, 0x2, 0x2, 0x203000)
	external/com_github_google_subcommands/subcommands.go:141 +0x522
github.com/google/subcommands.Execute(...)
	external/com_github_google_subcommands/subcommands.go:371
main.main()
	runsc/main.go:229 +0x246f