fatal error: too many address space collisions for -race mode
DIAGNOSIS:
I0314 06:23:43.042693   38473 main.go:305] ***************************
I0314 06:23:43.042870   38473 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-1]
I0314 06:23:43.043127   38473 main.go:307] Version release-20200219.0-175-g829beebf0b67
I0314 06:23:43.043226   38473 main.go:308] PID: 38473
I0314 06:23:43.043305   38473 main.go:309] UID: 0, GID: 0
I0314 06:23:43.043443   38473 main.go:310] Configuration:
I0314 06:23:43.043529   38473 main.go:311] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0314 06:23:43.043601   38473 main.go:312] 		Platform: ptrace
I0314 06:23:43.043709   38473 main.go:313] 		FileAccess: shared, overlay: false
I0314 06:23:43.043829   38473 main.go:314] 		Network: sandbox, logging: false
I0314 06:23:43.043899   38473 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0314 06:23:43.043985   38473 main.go:316] ***************************
W0314 06:23:43.044042   38473 main.go:321] Block the TERM signal. This is only safe in tests!
D0314 06:23:43.045550   38473 container.go:159] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0314 06:23:43.066664   38473 container.go:592] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-1": signal 0
D0314 06:23:43.066883   38473 sandbox.go:814] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0314 06:23:43.067037   38473 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0314 06:23:43.069522   38473 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0314 06:23:43.975118   38473 debug.go:128] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1", PID: 21011
I0314 06:23:43.975302   38473 debug.go:137] Retrieving sandbox stacks
D0314 06:23:43.975377   38473 sandbox.go:932] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0314 06:23:43.975483   38473 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
W0314 06:23:43.975640   38473 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 21011: connection refused
retrieving stacks: connecting to control server at PID 21011: connection refused
W0314 06:23:43.976547   38473 main.go:338] Failure to execute command, err: 1