fatal error: D0310 15:16:17.923587   64318 task_run.go:181] [  31] Restarting syscall 202 after errno 512: not interrupted by handled signal
DIAGNOSIS:
I0310 15:16:17.958166   17709 main.go:305] ***************************
I0310 15:16:17.958278   17709 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-0]
I0310 15:16:17.958441   17709 main.go:307] Version release-20200219.0-105-gb1576e533223
I0310 15:16:17.958550   17709 main.go:308] PID: 17709
I0310 15:16:17.958627   17709 main.go:309] UID: 0, GID: 0
I0310 15:16:17.958697   17709 main.go:310] Configuration:
I0310 15:16:17.958757   17709 main.go:311] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root
I0310 15:16:17.958838   17709 main.go:312] 		Platform: ptrace
I0310 15:16:17.958904   17709 main.go:313] 		FileAccess: exclusive, overlay: true
I0310 15:16:17.959008   17709 main.go:314] 		Network: host, logging: false
I0310 15:16:17.959097   17709 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0310 15:16:17.959174   17709 main.go:316] ***************************
W0310 15:16:17.959228   17709 main.go:321] Block the TERM signal. This is only safe in tests!
D0310 15:16:17.959477   17709 container.go:159] Load container "/syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-race-0"
D0310 15:16:17.972158   17709 container.go:592] Signal container "ci-gvisor-ptrace-direct-overlay-host-race-0": signal 0
D0310 15:16:17.972306   17709 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-race-0"
D0310 15:16:17.972388   17709 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-0"
D0310 15:16:17.972741   17709 urpc.go:534] urpc: successfully marshalled 123 bytes.
I0310 15:16:23.759647   17709 debug.go:122] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-race-0", PID: 64318
I0310 15:16:23.759796   17709 debug.go:131] Retrieving sandbox stacks
D0310 15:16:23.759854   17709 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-race-0"
D0310 15:16:23.759926   17709 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-0"
W0310 15:16:23.760089   17709 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 64318: connection refused
retrieving stacks: connecting to control server at PID 64318: connection refused
W0310 15:16:23.760414   17709 main.go:338] Failure to execute command, err: 1