panic: Watchdog goroutine is stuck:
Stack for running G's are skipped while panicking.

goroutine 177 [running]:
DIAGNOSIS:
I0316 12:18:46.856457    4367 main.go:305] ***************************
I0316 12:18:46.856538    4367 main.go:306] Args: [/syzkaller/managers/kvm-proxy-overlay-sandbox/current/image -root /syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=kvm -file-access=exclusive -overlay -network=sandbox debug -stacks --ps ci-gvisor-kvm-proxy-overlay-sandbox-1]
I0316 12:18:46.856584    4367 main.go:307] Version release-20200219.0-175-g829beebf0b67
I0316 12:18:46.856605    4367 main.go:308] PID: 4367
I0316 12:18:46.856630    4367 main.go:309] UID: 0, GID: 0
I0316 12:18:46.856650    4367 main.go:310] Configuration:
I0316 12:18:46.856669    4367 main.go:311] 		RootDir: /syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root
I0316 12:18:46.856694    4367 main.go:312] 		Platform: kvm
I0316 12:18:46.856714    4367 main.go:313] 		FileAccess: exclusive, overlay: true
I0316 12:18:46.856748    4367 main.go:314] 		Network: sandbox, logging: false
I0316 12:18:46.856777    4367 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0316 12:18:46.856797    4367 main.go:316] ***************************
D0316 12:18:46.856865    4367 container.go:159] Load container "/syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-proxy-overlay-sandbox-1"
D0316 12:18:46.860024    4367 container.go:592] Signal container "ci-gvisor-kvm-proxy-overlay-sandbox-1": signal 0
D0316 12:18:46.860067    4367 sandbox.go:814] Signal sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-1"
D0316 12:18:46.860081    4367 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-1"
D0316 12:18:46.860203    4367 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0316 12:18:48.139718    4367 debug.go:128] Found sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-1", PID: 12169
I0316 12:18:48.139765    4367 debug.go:137] Retrieving sandbox stacks
D0316 12:18:48.139790    4367 sandbox.go:932] Stacks sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-1"
D0316 12:18:48.139804    4367 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-1"
W0316 12:18:48.139845    4367 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 12169: connection refused
retrieving stacks: connecting to control server at PID 12169: connection refused
W0316 12:18:48.139978    4367 main.go:338] Failure to execute command, err: 1