fatal error: concurrent map iteration and map write
DIAGNOSIS:
I0301 06:02:35.315604 25953 main.go:305] ***************************
I0301 06:02:35.315657 25953 main.go:306] Args: [/syzkaller/managers/main/current/image -root /syzkaller/managers/main/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=none debug -stacks --ps ci-gvisor-main-1]
I0301 06:02:35.315695 25953 main.go:307] Version release-20200219.0-72-gce4d1e45bb88
I0301 06:02:35.315715 25953 main.go:308] PID: 25953
I0301 06:02:35.315741 25953 main.go:309] UID: 0, GID: 0
I0301 06:02:35.315769 25953 main.go:310] Configuration:
I0301 06:02:35.315804 25953 main.go:311] RootDir: /syzkaller/managers/main/workdir/gvisor_root
I0301 06:02:35.315837 25953 main.go:312] Platform: ptrace
I0301 06:02:35.315857 25953 main.go:313] FileAccess: shared, overlay: false
I0301 06:02:35.315901 25953 main.go:314] Network: none, logging: false
I0301 06:02:35.315924 25953 main.go:315] Strace: false, max size: 1024, syscalls: []
I0301 06:02:35.315946 25953 main.go:316] ***************************
D0301 06:02:35.315994 25953 container.go:159] Load container "/syzkaller/managers/main/workdir/gvisor_root" "ci-gvisor-main-1"
D0301 06:02:35.317408 25953 container.go:592] Signal container "ci-gvisor-main-1": signal 0
D0301 06:02:35.317446 25953 sandbox.go:806] Signal sandbox "ci-gvisor-main-1"
D0301 06:02:35.317458 25953 sandbox.go:318] Connecting to sandbox "ci-gvisor-main-1"
D0301 06:02:35.317626 25953 urpc.go:534] urpc: successfully marshalled 96 bytes.
I0301 06:02:35.477201 25953 debug.go:122] Found sandbox "ci-gvisor-main-1", PID: 19577
I0301 06:02:35.477272 25953 debug.go:131] Retrieving sandbox stacks
D0301 06:02:35.477303 25953 sandbox.go:924] Stacks sandbox "ci-gvisor-main-1"
D0301 06:02:35.477330 25953 sandbox.go:318] Connecting to sandbox "ci-gvisor-main-1"
W0301 06:02:35.477394 25953 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 19577: connection refused
retrieving stacks: connecting to control server at PID 19577: connection refused
W0301 06:02:35.477591 25953 main.go:338] Failure to execute command, err: 1