panic: Stack for running G's are skipped while panicking. Sentry detected 2 stuck task(s): Task tid: 46610 (0xb612), entered RunSys state 3m1.32s ago. Task tid: 46607 (0xb60f), entered RunSys state 3m1.32s ago. Search for '(*Task).run(0x..., 0x)' in the stack dump to find the offending goroutine goroutine 102 [running]: DIAGNOSIS: I0305 03:25:21.316271 6753 main.go:305] *************************** I0305 03:25:21.316408 6753 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-1] I0305 03:25:21.316666 6753 main.go:307] Version release-20200219.0-72-gce4d1e45bb88 I0305 03:25:21.316783 6753 main.go:308] PID: 6753 I0305 03:25:21.316884 6753 main.go:309] UID: 0, GID: 0 I0305 03:25:21.316951 6753 main.go:310] Configuration: I0305 03:25:21.317031 6753 main.go:311] RootDir: /syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root I0305 03:25:21.317091 6753 main.go:312] Platform: ptrace I0305 03:25:21.317157 6753 main.go:313] FileAccess: exclusive, overlay: true I0305 03:25:21.317241 6753 main.go:314] Network: host, logging: false I0305 03:25:21.317314 6753 main.go:315] Strace: false, max size: 1024, syscalls: [] I0305 03:25:21.317416 6753 main.go:316] *************************** W0305 03:25:21.317475 6753 main.go:321] Block the TERM signal. This is only safe in tests! D0305 03:25:21.317775 6753 container.go:159] Load container "/syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-race-1" D0305 03:25:21.325168 6753 container.go:592] Signal container "ci-gvisor-ptrace-direct-overlay-host-race-1": signal 0 D0305 03:25:21.325316 6753 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1" D0305 03:25:21.325411 6753 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1" D0305 03:25:21.325846 6753 urpc.go:534] urpc: successfully marshalled 123 bytes. I0305 03:25:26.665496 6753 debug.go:122] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1", PID: 60297 I0305 03:25:26.665758 6753 debug.go:131] Retrieving sandbox stacks D0305 03:25:26.665903 6753 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1" D0305 03:25:26.666018 6753 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-1" W0305 03:25:26.666208 6753 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 60297: connection refused retrieving stacks: connecting to control server at PID 60297: connection refused W0305 03:25:26.666530 6753 main.go:338] Failure to execute command, err: 1