panic: runtime error: makeslice: len out of range goroutine 12319 [running]: gvisor.dev/gvisor/pkg/tcpip/buffer.NewView(...) pkg/tcpip/buffer/view.go:24 DIAGNOSIS: I0316 21:38:14.942325 2599 main.go:305] *************************** I0316 21:38:14.942390 2599 main.go:306] Args: [/syzkaller/managers/kvm-direct-sandbox/current/image -root /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=kvm -file-access=exclusive -network=sandbox debug -stacks --ps ci-gvisor-kvm-direct-sandbox-3] I0316 21:38:14.942472 2599 main.go:307] Version release-20200219.0-160-gf693e1334b6f I0316 21:38:14.942498 2599 main.go:308] PID: 2599 I0316 21:38:14.942534 2599 main.go:309] UID: 0, GID: 0 I0316 21:38:14.942558 2599 main.go:310] Configuration: I0316 21:38:14.942582 2599 main.go:311] RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root I0316 21:38:14.942615 2599 main.go:312] Platform: kvm I0316 21:38:14.942640 2599 main.go:313] FileAccess: exclusive, overlay: false I0316 21:38:14.942687 2599 main.go:314] Network: sandbox, logging: false I0316 21:38:14.942726 2599 main.go:315] Strace: false, max size: 1024, syscalls: [] I0316 21:38:14.942764 2599 main.go:316] *************************** D0316 21:38:14.942845 2599 container.go:159] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-3" D0316 21:38:14.945535 2599 container.go:592] Signal container "ci-gvisor-kvm-direct-sandbox-3": signal 0 D0316 21:38:14.945599 2599 sandbox.go:814] Signal sandbox "ci-gvisor-kvm-direct-sandbox-3" D0316 21:38:14.945614 2599 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3" D0316 21:38:14.945805 2599 urpc.go:534] urpc: successfully marshalled 110 bytes. I0316 21:38:15.406361 2599 debug.go:128] Found sandbox "ci-gvisor-kvm-direct-sandbox-3", PID: 51970 I0316 21:38:15.406455 2599 debug.go:137] Retrieving sandbox stacks D0316 21:38:15.406500 2599 sandbox.go:932] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-3" D0316 21:38:15.406523 2599 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-3" W0316 21:38:15.406573 2599 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 51970: connection refused retrieving stacks: connecting to control server at PID 51970: connection refused W0316 21:38:15.406799 2599 main.go:338] Failure to execute command, err: 1