panic: runtime error: slice bounds out of range [:17] with capacity 16

DIAGNOSIS:
I0103 04:53:36.270740    5865 x:0] ***************************
I0103 04:53:36.270793    5865 x:0] Args: [/syzkaller/managers/ptrace-proxy-sandbox-race/current/image -root /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=sandbox -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-proxy-sandbox-race-2]
I0103 04:53:36.270886    5865 x:0] Version release-20191213.0-56-g1f384ac42b9e
I0103 04:53:36.270912    5865 x:0] PID: 5865
I0103 04:53:36.270942    5865 x:0] UID: 0, GID: 0
I0103 04:53:36.270970    5865 x:0] Configuration:
I0103 04:53:36.270993    5865 x:0] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0103 04:53:36.271021    5865 x:0] 		Platform: ptrace
I0103 04:53:36.271046    5865 x:0] 		FileAccess: shared, overlay: false
I0103 04:53:36.271085    5865 x:0] 		Network: sandbox, logging: false
I0103 04:53:36.271127    5865 x:0] 		Strace: false, max size: 1024, syscalls: []
I0103 04:53:36.271159    5865 x:0] ***************************
W0103 04:53:36.271181    5865 x:0] Block the TERM signal. This is only safe in tests!
D0103 04:53:36.271957    5865 x:0] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0103 04:53:36.279856    5865 x:0] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-2": signal 0
D0103 04:53:36.280041    5865 x:0] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0103 04:53:36.280107    5865 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0103 04:53:36.280656    5865 x:0] urpc: successfully marshalled 117 bytes.
I0103 04:53:36.713073    5865 x:0] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2", PID: 43299
I0103 04:53:36.713194    5865 x:0] Retrieving sandbox stacks
D0103 04:53:36.713253    5865 x:0] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0103 04:53:36.713342    5865 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0103 04:53:36.713500    5865 x:0] urpc: successfully marshalled 36 bytes.
W0103 04:53:36.823275    5865 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W0103 04:53:36.823619    5865 x:0] Failure to execute command, err: 1