fatal error: out of memory
DIAGNOSIS:
I0313 11:42:14.169787   44755 main.go:305] ***************************
I0313 11:42:14.169859   44755 main.go:306] Args: [/syzkaller/managers/kvm-proxy-overlay-sandbox/current/image -root /syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=kvm -file-access=exclusive -overlay -network=sandbox debug -stacks --ps ci-gvisor-kvm-proxy-overlay-sandbox-2]
I0313 11:42:14.169922   44755 main.go:307] Version release-20200219.0-158-g919664600d8d
I0313 11:42:14.169951   44755 main.go:308] PID: 44755
I0313 11:42:14.169988   44755 main.go:309] UID: 0, GID: 0
I0313 11:42:14.170022   44755 main.go:310] Configuration:
I0313 11:42:14.170064   44755 main.go:311] 		RootDir: /syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root
I0313 11:42:14.170096   44755 main.go:312] 		Platform: kvm
I0313 11:42:14.170124   44755 main.go:313] 		FileAccess: exclusive, overlay: true
I0313 11:42:14.170175   44755 main.go:314] 		Network: sandbox, logging: false
I0313 11:42:14.170204   44755 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0313 11:42:14.170230   44755 main.go:316] ***************************
D0313 11:42:14.170905   44755 container.go:159] Load container "/syzkaller/managers/kvm-proxy-overlay-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-proxy-overlay-sandbox-2"
D0313 11:42:14.173057   44755 container.go:592] Signal container "ci-gvisor-kvm-proxy-overlay-sandbox-2": signal 0
D0313 11:42:14.173106   44755 sandbox.go:814] Signal sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-2"
D0313 11:42:14.173124   44755 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-2"
D0313 11:42:14.173302   44755 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0313 11:42:14.812182   44755 debug.go:128] Found sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-2", PID: 32894
I0313 11:42:14.812240   44755 debug.go:137] Retrieving sandbox stacks
D0313 11:42:14.812284   44755 sandbox.go:932] Stacks sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-2"
D0313 11:42:14.812305   44755 sandbox.go:318] Connecting to sandbox "ci-gvisor-kvm-proxy-overlay-sandbox-2"
W0313 11:42:14.812355   44755 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 32894: connection refused
retrieving stacks: connecting to control server at PID 32894: connection refused
W0313 11:42:14.812493   44755 main.go:338] Failure to execute command, err: 1