panic: Watchdog goroutine is stuck:
DIAGNOSIS:
I0317 12:10:16.060551   64274 main.go:305] ***************************
I0317 12:10:16.060606   64274 main.go:306] Args: [/syzkaller/managers/kvm-direct-sandbox/current/image -root /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=kvm -file-access=exclusive -network=sandbox debug -stacks --ps ci-gvisor-kvm-direct-sandbox-2]
I0317 12:10:16.060673   64274 main.go:307] Version release-20200219.0-160-gf693e1334b6f
I0317 12:10:16.060693   64274 main.go:308] PID: 64274
I0317 12:10:16.060718   64274 main.go:309] UID: 0, GID: 0
I0317 12:10:16.060738   64274 main.go:310] Configuration:
I0317 12:10:16.060758   64274 main.go:311] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0317 12:10:16.060784   64274 main.go:312] 		Platform: kvm
I0317 12:10:16.060804   64274 main.go:313] 		FileAccess: exclusive, overlay: false
I0317 12:10:16.060838   64274 main.go:314] 		Network: sandbox, logging: false
I0317 12:10:16.060861   64274 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0317 12:10:16.060882   64274 main.go:316] ***************************
D0317 12:10:16.060937   64274 container.go:159] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-2"
D0317 12:10:16.062305   64274 container.go:592] Signal container "ci-gvisor-kvm-direct-sandbox-2": signal 0
D0317 12:10:16.062338   64274 sandbox.go:814] Signal sandbox "ci-gvisor-kvm-direct-sandbox-2"
D0317 12:10:16.062351   64274 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-2"
D0317 12:10:16.073533   64274 urpc.go:534] urpc: successfully marshalled 110 bytes.
I0317 12:10:16.813192   64274 debug.go:128] Found sandbox "ci-gvisor-kvm-direct-sandbox-2", PID: 52313
I0317 12:10:16.813249   64274 debug.go:137] Retrieving sandbox stacks
D0317 12:10:16.813281   64274 sandbox.go:932] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-2"
D0317 12:10:16.813298   64274 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-2"
W0317 12:10:16.813365   64274 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 52313: connection refused
retrieving stacks: connecting to control server at PID 52313: connection refused
W0317 12:10:16.813520   64274 main.go:338] Failure to execute command, err: 1