panic: runtime error: index out of range

goroutine 2134017 [running]:
DIAGNOSIS:
I0403 20:24:24.077525   30359 x:0] ***************************
I0403 20:24:24.077588   30359 x:0] Args: [/syzkaller/managers/ptrace-direct-overlay-host/current/image -root /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=shared -network=host debug -stacks ci-gvisor-ptrace-direct-overlay-host-2]
I0403 20:24:24.077600   30359 x:0] Version release-20190304.1-78-gc4caccd54042
I0403 20:24:24.077604   30359 x:0] PID: 30359
I0403 20:24:24.077614   30359 x:0] UID: 0, GID: 0
I0403 20:24:24.077616   30359 x:0] Configuration:
I0403 20:24:24.077619   30359 x:0] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root
I0403 20:24:24.077622   30359 x:0] 		Platform: ptrace
I0403 20:24:24.077627   30359 x:0] 		FileAccess: shared, overlay: false
I0403 20:24:24.077632   30359 x:0] 		Network: host, logging: false
I0403 20:24:24.077637   30359 x:0] 		Strace: false, max size: 1024, syscalls: []
I0403 20:24:24.077640   30359 x:0] ***************************
D0403 20:24:24.077658   30359 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-2"
D0403 20:24:24.078989   30359 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-2": signal 0
D0403 20:24:24.079014   30359 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-2"
D0403 20:24:24.079018   30359 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-2"
D0403 20:24:24.082258   30359 x:0] urpc: successfully marshalled 118 bytes.
I0403 20:24:24.447856   30359 x:0] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-2", PID: 53397
I0403 20:24:24.447871   30359 x:0] Retrieving sandbox stacks
D0403 20:24:24.447875   30359 x:0] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-2"
D0403 20:24:24.447879   30359 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-2"
D0403 20:24:24.447937   30359 x:0] urpc: successfully marshalled 36 bytes.
W0403 20:24:24.500364   30359 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-ptrace-direct-overlay-host-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-ptrace-direct-overlay-host-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer