panic: Stack for running G's are skipped while panicking.
Sentry detected 2 stuck task(s):
	Task tid: 30258 (0x7632), entered RunSys state 3m12.71s ago.
	Task tid: 30261 (0x7635), entered RunSys state 3m12.71s ago.
Search for '(*Task).run(0x..., 0x<tid>)' in the stack dump to find the offending goroutine

goroutine 154 [running]:
DIAGNOSIS:
I0304 18:54:38.351279   56969 main.go:305] ***************************
I0304 18:54:38.351423   56969 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]
I0304 18:54:38.351677   56969 main.go:307] Version release-20200219.0-72-gce4d1e45bb88
I0304 18:54:38.351768   56969 main.go:308] PID: 56969
I0304 18:54:38.351858   56969 main.go:309] UID: 0, GID: 0
I0304 18:54:38.351964   56969 main.go:310] Configuration:
I0304 18:54:38.352047   56969 main.go:311] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0304 18:54:38.352182   56969 main.go:312] 		Platform: ptrace
I0304 18:54:38.352285   56969 main.go:313] 		FileAccess: shared, overlay: false
I0304 18:54:38.352389   56969 main.go:314] 		Network: sandbox, logging: false
I0304 18:54:38.352483   56969 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0304 18:54:38.352584   56969 main.go:316] ***************************
W0304 18:54:38.352706   56969 main.go:321] Block the TERM signal. This is only safe in tests!
D0304 18:54:38.352897   56969 container.go:159] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0304 18:54:38.362775   56969 container.go:592] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-1": signal 0
D0304 18:54:38.362929   56969 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0304 18:54:38.363043   56969 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0304 18:54:38.363570   56969 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0304 18:54:47.221938   56969 debug.go:122] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1", PID: 37092
I0304 18:54:47.222109   56969 debug.go:131] Retrieving sandbox stacks
D0304 18:54:47.222235   56969 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
D0304 18:54:47.222335   56969 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-1"
W0304 18:54:47.222479   56969 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 37092: connection refused
retrieving stacks: connecting to control server at PID 37092: connection refused
W0304 18:54:47.222821   56969 main.go:338] Failure to execute command, err: 1