panic: runtime error: index out of range

goroutine 28288 [running]:
DIAGNOSIS:
I0403 12:48:11.838910   25773 x:0] ***************************
I0403 12:48:11.839039   25773 x:0] Args: [/syzkaller/managers/kvm-direct-overlay-host-race/current/image -root /syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=exclusive -overlay -network=host debug -stacks ci-gvisor-kvm-direct-overlay-host-race-3]
I0403 12:48:11.839141   25773 x:0] Version release-20190304.1-78-gc4caccd54042
I0403 12:48:11.839187   25773 x:0] PID: 25773
I0403 12:48:11.842312   25773 x:0] UID: 0, GID: 0
I0403 12:48:11.842363   25773 x:0] Configuration:
I0403 12:48:11.843649   25773 x:0] 		RootDir: /syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root
I0403 12:48:11.843715   25773 x:0] 		Platform: ptrace
I0403 12:48:11.843775   25773 x:0] 		FileAccess: exclusive, overlay: true
I0403 12:48:11.843835   25773 x:0] 		Network: host, logging: false
I0403 12:48:11.843884   25773 x:0] 		Strace: false, max size: 1024, syscalls: []
I0403 12:48:11.843916   25773 x:0] ***************************
D0403 12:48:11.843977   25773 x:0] Load container "/syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-kvm-direct-overlay-host-race-3"
D0403 12:48:11.862573   25773 x:0] Signal container "ci-gvisor-kvm-direct-overlay-host-race-3": signal 0
D0403 12:48:11.862746   25773 x:0] Signal sandbox "ci-gvisor-kvm-direct-overlay-host-race-3"
D0403 12:48:11.862824   25773 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-overlay-host-race-3"
D0403 12:48:11.868508   25773 x:0] urpc: successfully marshalled 120 bytes.
I0403 12:48:12.067427   25773 x:0] Found sandbox "ci-gvisor-kvm-direct-overlay-host-race-3", PID: 23474
I0403 12:48:12.067512   25773 x:0] Retrieving sandbox stacks
D0403 12:48:12.067555   25773 x:0] Stacks sandbox "ci-gvisor-kvm-direct-overlay-host-race-3"
D0403 12:48:12.067609   25773 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-overlay-host-race-3"
D0403 12:48:12.067768   25773 x:0] urpc: successfully marshalled 36 bytes.
W0403 12:48:12.105369   25773 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-overlay-host-race-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-overlay-host-race-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer