panic: runtime error: index out of range

goroutine 1099 [running]:
DIAGNOSIS:
I0329 20:38:07.685829   55874 x:0] ***************************
I0329 20:38:07.685970   55874 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-1]
I0329 20:38:07.686031   55874 x:0] Git Revision: cc0e96a4bd3348ecc2a636fd90118b8e5cce672c
I0329 20:38:07.686056   55874 x:0] PID: 55874
I0329 20:38:07.686075   55874 x:0] UID: 0, GID: 0
I0329 20:38:07.686108   55874 x:0] Configuration:
I0329 20:38:07.686125   55874 x:0] 		RootDir: /syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root
I0329 20:38:07.686138   55874 x:0] 		Platform: ptrace
I0329 20:38:07.686163   55874 x:0] 		FileAccess: exclusive, overlay: true
I0329 20:38:07.686182   55874 x:0] 		Network: host, logging: false
I0329 20:38:07.686205   55874 x:0] 		Strace: false, max size: 1024, syscalls: []
I0329 20:38:07.686235   55874 x:0] ***************************
D0329 20:38:07.686283   55874 x:0] Load container "/syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-kvm-direct-overlay-host-race-1"
D0329 20:38:07.692169   55874 x:0] Signal container "ci-gvisor-kvm-direct-overlay-host-race-1": signal 0
D0329 20:38:07.692239   55874 x:0] Signal sandbox "ci-gvisor-kvm-direct-overlay-host-race-1"
D0329 20:38:07.692275   55874 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-overlay-host-race-1"
D0329 20:38:07.692669   55874 x:0] urpc: successfully marshalled 120 bytes.
I0329 20:38:07.848770   55874 x:0] Found sandbox "ci-gvisor-kvm-direct-overlay-host-race-1", PID: 43622
I0329 20:38:07.848837   55874 x:0] Retrieving sandbox stacks
D0329 20:38:07.848882   55874 x:0] Stacks sandbox "ci-gvisor-kvm-direct-overlay-host-race-1"
D0329 20:38:07.848910   55874 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-overlay-host-race-1"
W0329 20:38:07.849006   55874 x:0] FATAL ERROR: retrieving stacks: connecting to control server at PID 43622: connection refused
retrieving stacks: connecting to control server at PID 43622: connection refused