WARNING: DATA RACE
DIAGNOSIS:
I0502 06:38:22.759969    3894 x:0] ***************************
I0502 06:38:22.762463    3894 x:0] Args: [/syzkaller/managers/ptrace-proxy-sandbox-race/current/image -root /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=shared -network=sandbox debug -stacks ci-gvisor-ptrace-proxy-sandbox-race-0]
I0502 06:38:22.762558    3894 x:0] Version release-20190304.1-163-g8bfb83d0acde
I0502 06:38:22.763652    3894 x:0] PID: 3894
I0502 06:38:22.763733    3894 x:0] UID: 0, GID: 0
I0502 06:38:22.763822    3894 x:0] Configuration:
I0502 06:38:22.763881    3894 x:0] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0502 06:38:22.763925    3894 x:0] 		Platform: ptrace
I0502 06:38:22.764000    3894 x:0] 		FileAccess: shared, overlay: false
I0502 06:38:22.764020    3894 x:0] 		Network: sandbox, logging: false
I0502 06:38:22.764045    3894 x:0] 		Strace: false, max size: 1024, syscalls: []
I0502 06:38:22.764098    3894 x:0] ***************************
D0502 06:38:22.764197    3894 x:0] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0502 06:38:22.775750    3894 x:0] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-0": signal 0
D0502 06:38:22.775902    3894 x:0] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0502 06:38:22.775992    3894 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0502 06:38:22.776792    3894 x:0] urpc: successfully marshalled 117 bytes.
D0502 06:38:22.777575    3894 x:0] urpc: unmarshal success.
I0502 06:38:22.777770    3894 x:0] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0", PID: 3518
I0502 06:38:22.777809    3894 x:0] Retrieving sandbox stacks
D0502 06:38:22.777824    3894 x:0] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0502 06:38:22.777858    3894 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0502 06:38:22.778357    3894 x:0] urpc: successfully marshalled 36 bytes.
D0502 06:38:22.907854    3894 x:0] urpc: unmarshal success.
I0502 06:38:22.908129    3894 x:0]      *** Stack dump ***
goroutine 848 [running]:
gvisor.googlesource.com/gvisor/pkg/log.Stacks(0x45c801, 0xc000107260, 0xc000421950, 0xc0002bc380)
	pkg/log/log.go:259 +0xb6
gvisor.googlesource.com/gvisor/runsc/boot.(*debug).Stacks(0x2427e60, 0x2427e60, 0xc0003f2010, 0x0, 0x0)
	runsc/boot/debug.go:26 +0x38
reflect.Value.call(0xc000107260, 0xc0000101d0, 0x13, 0x115a58b, 0x4, 0xc000761eb8, 0x3, 0x3, 0x4a864e, 0x10074e0, ...)
	GOROOT/src/reflect/value.go:447 +0x649
reflect.Value.Call(0xc000107260, 0xc0000101d0, 0x13, 0xc000761eb8, 0x3, 0x3, 0x0, 0x2427e60, 0x16)
	GOROOT/src/reflect/value.go:308 +0xc1
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).handleOne(0xc0002b0150, 0xc000438900, 0x0, 0x0)
	pkg/urpc/urpc.go:325 +0x63f
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).handleRegistered(0xc0002b0150, 0xc000438900, 0xc0002b0150, 0xc000438900)
	pkg/urpc/urpc.go:420 +0x43
gvisor.googlesource.com/gvisor/pkg/urpc.(*Server).StartHandling.func1(0xc0002b0150, 0xc000438900)
	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]:
sync.runtime_Semacquire(0xc0002d6214)
	GOROOT/src/runtime/sema.go:56 +0x39
sync.(*WaitGroup).Wait(0xc0002d6214)
	GOROOT/src/sync/waitgroup.go:130 +0xb2
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Kernel).WaitExited(...)
	pkg/sentry/kernel/kernel.go:896
gvisor.googlesource.com/gvisor/runsc/boot.(*Loader).WaitExit(0xc0002ce140, 0x0, 0x0)
	runsc/boot/loader.go:785 +0x74
gvisor.googlesource.com/gvisor/runsc/cmd.(*Boot).Execute(0xc0001b41b0, 0x12f0300, 0xc00013a010, 0xc0002722a0, 0xc00022c6e0, 0x2, 0x2, 0x0)
	runsc/cmd/boot.go:252 +0x12e4
github.com/google/subcommands.(*Commander).Execute(0xc000146000, 0x12f0300, 0xc00013a010, 0xc00022c6e0, 0x2, 0x2, 0xc000142880)
	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:245 +0x254e