panic: runtime error: index out of range

goroutine 21495 [running]:
DIAGNOSIS:
I0330 00:42:57.576955   19025 x:0] ***************************
I0330 00:42:57.577022   19025 x:0] Args: [/syzkaller/managers/kvm-direct-sandbox/current/image -root /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=kvm -file-access=exclusive -network=sandbox debug -stacks ci-gvisor-kvm-direct-sandbox-0]
I0330 00:42:57.577036   19025 x:0] Git Revision: cc0e96a4bd3348ecc2a636fd90118b8e5cce672c
I0330 00:42:57.577040   19025 x:0] PID: 19025
I0330 00:42:57.577045   19025 x:0] UID: 0, GID: 0
I0330 00:42:57.577048   19025 x:0] Configuration:
I0330 00:42:57.577050   19025 x:0] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0330 00:42:57.577053   19025 x:0] 		Platform: kvm
I0330 00:42:57.577065   19025 x:0] 		FileAccess: exclusive, overlay: false
I0330 00:42:57.577071   19025 x:0] 		Network: sandbox, logging: false
I0330 00:42:57.577091   19025 x:0] 		Strace: false, max size: 1024, syscalls: []
I0330 00:42:57.577095   19025 x:0] ***************************
D0330 00:42:57.577124   19025 x:0] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-0"
D0330 00:42:57.578620   19025 x:0] Signal container "ci-gvisor-kvm-direct-sandbox-0": signal 0
D0330 00:42:57.578651   19025 x:0] Signal sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0330 00:42:57.578656   19025 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0330 00:42:57.578795   19025 x:0] urpc: successfully marshalled 110 bytes.
I0330 00:42:57.779353   19025 x:0] Found sandbox "ci-gvisor-kvm-direct-sandbox-0", PID: 56443
I0330 00:42:57.779387   19025 x:0] Retrieving sandbox stacks
D0330 00:42:57.779393   19025 x:0] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0330 00:42:57.779397   19025 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0330 00:42:57.779461   19025 x:0] urpc: successfully marshalled 36 bytes.
W0330 00:42:57.795599   19025 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer