panic: runtime error: invalid memory address or nil pointer dereference
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x7d93be]

goroutine 528505 [running]:
panic(0x1104b00, 0x1ceb110)
	GOROOT/src/runtime/panic.go:1064 +0x470 fp=0xc000fd5410 sp=0xc000fd5358 pc=0x437110
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:720 +0x413 fp=0xc000fd5440 sp=0xc000fd5410 pc=0x44def3
gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).DecRef(0x0, 0x14224a0, 0xc00ac58a80)
	pkg/sentry/vfs/file_description.go:169 +0x5e fp=0xc000fd5480 sp=0xc000fd5440 pc=0x7d93be
runtime.call32(0x0, 0x12dd8e0, 0xc0088a66a8, 0x1800000018)
	src/runtime/asm_amd64.s:540 +0x3e fp=0xc000fd54b0 sp=0xc000fd5480 pc=0x46edfe
runtime.reflectcallSave(0xc000fd55e0, 0x12dd8e0, 0xc0088a66a8, 0xc000000018)
	GOROOT/src/runtime/panic.go:881 +0x58 fp=0xc000fd54e0 sp=0xc000fd54b0 pc=0x436bd8
runtime.runOpenDeferFrame(0xc004248a80, 0xc0088a6660, 0xc000fd5628)
	GOROOT/src/runtime/panic.go:855 +0x2cd fp=0xc000fd5570 sp=0xc000fd54e0 pc=0x436a8d
panic(0x1104b00, 0x1ceb110)
	GOROOT/src/runtime/panic.go:969 +0x175 fp=0xc000fd5628 sp=0xc000fd5570 pc=0x436e15
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:212
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:720 +0x413 fp=0xc000fd5658 sp=0xc000fd5628 pc=0x44def3
gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Impl(...)
	pkg/sentry/vfs/file_description.go:347
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.FilesystemType.GetFilesystem(0x14224a0, 0xc00ac58a80, 0xc00071c688, 0xc007c40ea0, 0xc00a184e00, 0x0, 0xc00a185100, 0x1a, 0x0, 0x0, ...)
	pkg/sentry/fsimpl/fuse/fusefs.go:146 +0x437 fp=0xc000fd57e0 sp=0xc000fd5658 pc=0xf3dcf7
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*FilesystemType).GetFilesystem(0x1d31e60, 0x14224a0, 0xc00ac58a80, 0xc00071c688, 0xc007c40ea0, 0xc00a184e00, 0x0, 0xc00a185100, 0x1a, 0x0, ...)
	<autogenerated>:1 +0xc5 fp=0xc000fd5860 sp=0xc000fd57e0 pc=0xf4e485
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MountDisconnected(0xc00071c688, 0x14224a0, 0xc00ac58a80, 0xc007c40ea0, 0xc00a184e00, 0x0, 0xc00a184d00, 0x4, 0xc000fd5ae8, 0x0, ...)
	pkg/sentry/vfs/mount.go:218 +0x15c fp=0xc000fd5930 sp=0xc000fd5860 pc=0x7e539c
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MountAt(0xc00071c688, 0x14224a0, 0xc00ac58a80, 0xc007c40ea0, 0xc00a184e00, 0x0, 0xc000fd5b18, 0xc00a184d00, 0x4, 0xc000fd5ae8, ...)
	pkg/sentry/vfs/mount.go:306 +0xde fp=0xc000fd59d0 sp=0xc000fd5930 pc=0x7e5ade
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Mount(0xc00ac58a80, 0xf0ffff, 0x200020c0, 0x20002100, 0x0, 0x20000040, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/vfs2/mount.go:141 +0x5d4 fp=0xc000fd5b90 sp=0xc000fd59d0 pc=0xe5f1f4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00ac58a80, 0xa5, 0xf0ffff, 0x200020c0, 0x20002100, 0x0, 0x20000040, 0x0, 0x0, 0x1289700, ...)
	pkg/sentry/kernel/task_syscall.go:116 +0x1b9 fp=0xc000fd5c50 sp=0xc000fd5b90 pc=0xa4d459
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00ac58a80, 0xa5, 0xf0ffff, 0x200020c0, 0x20002100, 0x0, 0x20000040, 0x0, 0x20000040, 0x0)
	pkg/sentry/kernel/task_syscall.go:291 +0x70 fp=0xc000fd5cd8 sp=0xc000fd5c50 pc=0xa4e710
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00ac58a80, 0xa5, 0xf0ffff, 0x200020c0, 0x20002100, 0x0, 0x20000040, 0x0, 0xc009d0aa60, 0xc009d0a9c0)
	pkg/sentry/kernel/task_syscall.go:238 +0xb4 fp=0xc000fd5d38 sp=0xc000fd5cd8 pc=0xa4e214
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00ac58a80, 0x2, 0xc00ac58a80)
	pkg/sentry/kernel/task_syscall.go:205 +0x198 fp=0xc000fd5e08 sp=0xc000fd5d38 pc=0xa4daf8
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00ac58a80, 0x13f4980, 0x0)
	pkg/sentry/kernel/task_run.go:327 +0xd95 fp=0xc000fd5f60 sp=0xc000fd5e08 pc=0xa405b5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00ac58a80, 0x4f10)
	pkg/sentry/kernel/task_run.go:100 +0x1e2 fp=0xc000fd5fd0 sp=0xc000fd5f60 pc=0xa3f0c2
runtime.goexit()
	src/runtime/asm_amd64.s:1374 +0x1 fp=0xc000fd5fd8 sp=0xc000fd5fd0 pc=0x470681
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:374 +0x116