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

DIAGNOSIS:
I0311 13:03:32.004682   26655 main.go:305] ***************************
I0311 13:03:32.004859   26655 main.go:306] Args: [/syzkaller/managers/ptrace-direct-overlay-host-race/current/image -root /syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=exclusive -overlay -network=host -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-direct-overlay-host-race-3]
I0311 13:03:32.005092   26655 main.go:307] Version release-20200219.0-136-g24e7005ab6bd
I0311 13:03:32.005208   26655 main.go:308] PID: 26655
I0311 13:03:32.005329   26655 main.go:309] UID: 0, GID: 0
I0311 13:03:32.005464   26655 main.go:310] Configuration:
I0311 13:03:32.005594   26655 main.go:311] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root
I0311 13:03:32.005687   26655 main.go:312] 		Platform: ptrace
I0311 13:03:32.005774   26655 main.go:313] 		FileAccess: exclusive, overlay: true
I0311 13:03:32.005923   26655 main.go:314] 		Network: host, logging: false
I0311 13:03:32.006019   26655 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0311 13:03:32.006152   26655 main.go:316] ***************************
W0311 13:03:32.006237   26655 main.go:321] Block the TERM signal. This is only safe in tests!
D0311 13:03:32.008401   26655 container.go:159] Load container "/syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-race-3"
D0311 13:03:32.017647   26655 container.go:592] Signal container "ci-gvisor-ptrace-direct-overlay-host-race-3": signal 0
D0311 13:03:32.017835   26655 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-race-3"
D0311 13:03:32.018024   26655 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-3"
D0311 13:03:32.018802   26655 urpc.go:534] urpc: successfully marshalled 123 bytes.
I0311 13:03:32.601540   26655 debug.go:128] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-race-3", PID: 14416
I0311 13:03:32.601737   26655 debug.go:137] Retrieving sandbox stacks
D0311 13:03:32.601827   26655 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-race-3"
D0311 13:03:32.601938   26655 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-3"
W0311 13:03:32.602161   26655 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 14416: connection refused
retrieving stacks: connecting to control server at PID 14416: connection refused
W0311 13:03:32.602561   26655 main.go:338] Failure to execute command, err: 1