panic: munmap(a00000, 200000)) failed: function not implemented
DIAGNOSIS:
I1008 22:48:43.234853   30627 x:0] ***************************
I1008 22:48:43.234899   30627 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 -alsologtostderr -platform=ptrace -file-access=shared -network=host debug -stacks ci-gvisor-ptrace-direct-overlay-host-2]
I1008 22:48:43.234916   30627 x:0] Version release-20190806.1-247-g7c1587e3401a
I1008 22:48:43.234924   30627 x:0] PID: 30627
I1008 22:48:43.234929   30627 x:0] UID: 0, GID: 0
I1008 22:48:43.234933   30627 x:0] Configuration:
I1008 22:48:43.234938   30627 x:0] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root
I1008 22:48:43.234945   30627 x:0] 		Platform: ptrace
I1008 22:48:43.234950   30627 x:0] 		FileAccess: shared, overlay: false
I1008 22:48:43.234959   30627 x:0] 		Network: host, logging: false
I1008 22:48:43.234975   30627 x:0] 		Strace: false, max size: 1024, syscalls: []
I1008 22:48:43.234981   30627 x:0] ***************************
D1008 22:48:43.235015   30627 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-2"
D1008 22:48:43.237291   30627 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-2": signal 0
D1008 22:48:43.237324   30627 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-2"
D1008 22:48:43.237331   30627 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-2"
D1008 22:48:43.237538   30627 x:0] urpc: successfully marshalled 118 bytes.
I1008 22:48:43.576837   30627 x:0] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-2", PID: 30358
I1008 22:48:43.576864   30627 x:0] Retrieving sandbox stacks
D1008 22:48:43.576873   30627 x:0] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-2"
D1008 22:48:43.576879   30627 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-2"
D1008 22:48:43.576934   30627 x:0] urpc: successfully marshalled 36 bytes.
W1008 22:48:43.690831   30627 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
W1008 22:48:43.690928   30627 x:0] Failure to execute command, err: 1