WARNING: DATA RACE
Write at 0x00c000878698 by goroutine 287:
  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
  gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).DecUsers()
      pkg/sentry/mm/lifecycle.go:226 +0x27e
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runExitMain).execute()
      pkg/sentry/kernel/task_context.go:64 +0x383
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:91 +0x2e5

Previous read at 0x00c000878698 by goroutine 338:
  reflect.typedmemmove()
      GOROOT/src/runtime/mbarrier.go:177 +0x0
  reflect.packEface()
      GOROOT/src/reflect/value.go:119 +0x104
  reflect.valueInterface()
      GOROOT/src/reflect/value.go:1009 +0x170
  fmt.(*pp).printValue()
      GOROOT/src/reflect/value.go:979 +0x3928
DIAGNOSIS:
I0307 07:02:17.161265   65438 x:0] ***************************
I0307 07:02:17.161441   65438 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-3]
I0307 07:02:17.161572   65438 x:0] Git Revision: 0b76887147820a809beaa497ede8dc4f7b7b120a
I0307 07:02:17.161652   65438 x:0] PID: 65438
I0307 07:02:17.161696   65438 x:0] UID: 0, GID: 0
I0307 07:02:17.161748   65438 x:0] Configuration:
I0307 07:02:17.161821   65438 x:0] 		RootDir: /syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root
I0307 07:02:17.161856   65438 x:0] 		Platform: ptrace
I0307 07:02:17.161899   65438 x:0] 		FileAccess: exclusive, overlay: true
I0307 07:02:17.161950   65438 x:0] 		Network: host, logging: false
I0307 07:02:17.162010   65438 x:0] 		Strace: false, max size: 1024, syscalls: []
I0307 07:02:17.162050   65438 x:0] ***************************
D0307 07:02:17.162376   65438 x:0] Load container "/syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-kvm-direct-overlay-host-race-3"
D0307 07:02:17.171217   65438 x:0] Signal container "ci-gvisor-kvm-direct-overlay-host-race-3": signal 0
D0307 07:02:17.171303   65438 x:0] Signal sandbox "ci-gvisor-kvm-direct-overlay-host-race-3"
D0307 07:02:17.171361   65438 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-overlay-host-race-3"
D0307 07:02:17.172411   65438 x:0] urpc: successfully marshalled 120 bytes.
D0307 07:02:17.175312   65438 x:0] urpc: unmarshal success.
I0307 07:02:17.175458   65438 x:0] Found sandbox "ci-gvisor-kvm-direct-overlay-host-race-3", PID: 54383
I0307 07:02:17.175521   65438 x:0] Retrieving sandbox stacks
D0307 07:02:17.175556   65438 x:0] Stacks sandbox "ci-gvisor-kvm-direct-overlay-host-race-3"
D0307 07:02:17.175622   65438 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-overlay-host-race-3"
D0307 07:02:17.176880   65438 x:0] urpc: successfully marshalled 36 bytes.
D0307 07:02:17.296723   65438 x:0] urpc: unmarshal success.
I0307 07:02:17.297191   65438 x:0]      *** Stack dump ***
goroutine 60750 [running]:
gvisor.googlesource.com/gvisor/pkg/log.Stacks(0x459c01, 0xc00012cd20, 0xc000195260, 0xc0001ef880)
	pkg/log/log.go:259 +0xb6
gvisor.googlesource.com/gvisor/runsc/boot.(*debug).Stacks(0x23767e8, 0x23767e8, 0xc0002b86a0, 0x0, 0x0)
	runsc/boot/debug.go:26 +0x38
reflect.Value.call(0xc00012cd20, 0xc0002e21c0, 0x13, 0x10eb560, 0x4, 0xc0009cdeb8, 0x3, 0x3, 0x4a4dee, 0xfa25c0, ...)
	GOROOT/src/reflect/value.go:447 +0x63f
reflect.Value.Call(0xc00012cd20, 0xc0002e21c0, 0x13, 0xc0009cdeb8, 0x3, 0x3, 0x0, 0x23767e8, 0x16)
	GOROOT/src/reflect/value.go:308 +0xc1
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).handleOne(0xc0002ec5a0, 0xc0006db4a0, 0x0, 0x0)
	pkg/urpc/urpc.go:325 +0x63f
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).handleRegistered(0xc0002ec5a0, 0xc0006db4a0, 0xc0002ec5a0, 0xc0006db4a0)
	pkg/urpc/urpc.go:420 +0x43
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).StartHandling.func1(0xc0002ec5a0, 0xc0006db4a0)
	pkg/urpc/urpc.go:440 +0x77
created by gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).StartHandling
	pkg/urpc/urpc.go:438 +0x6f