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


goroutine 179 [running]:
DIAGNOSIS:
I0302 03:34:18.669883   50018 main.go:305] ***************************
I0302 03:34:18.670222   50018 main.go:306] 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 -alsologtostderr -platform=ptrace -file-access=shared -network=sandbox -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-proxy-sandbox-race-3]
I0302 03:34:18.670431   50018 main.go:307] Version release-20200219.0-72-gce4d1e45bb88
I0302 03:34:18.670511   50018 main.go:308] PID: 50018
I0302 03:34:18.670608   50018 main.go:309] UID: 0, GID: 0
I0302 03:34:18.670688   50018 main.go:310] Configuration:
I0302 03:34:18.670823   50018 main.go:311] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0302 03:34:18.670934   50018 main.go:312] 		Platform: ptrace
I0302 03:34:18.671039   50018 main.go:313] 		FileAccess: shared, overlay: false
I0302 03:34:18.671158   50018 main.go:314] 		Network: sandbox, logging: false
I0302 03:34:18.671277   50018 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0302 03:34:18.671395   50018 main.go:316] ***************************
W0302 03:34:18.671476   50018 main.go:321] Block the TERM signal. This is only safe in tests!
D0302 03:34:18.671783   50018 container.go:159] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-3"
D0302 03:34:18.679745   50018 container.go:592] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-3": signal 0
D0302 03:34:18.679919   50018 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3"
D0302 03:34:18.680020   50018 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3"
D0302 03:34:18.680614   50018 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0302 03:34:26.043431   50018 debug.go:122] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3", PID: 52763
I0302 03:34:26.043556   50018 debug.go:131] Retrieving sandbox stacks
D0302 03:34:26.043647   50018 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3"
D0302 03:34:26.043748   50018 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-3"
W0302 03:34:26.043907   50018 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 52763: connection refused
retrieving stacks: connecting to control server at PID 52763: connection refused
W0302 03:34:26.044831   50018 main.go:338] Failure to execute command, err: 1