panic: Decrementing non-positive ref count 0xc000993790, owned by vfs.Filesystem

goroutine 256 [running]:
panic({0x298660?, 0xc0005a6e20?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc000817730 sp=0xc000817680 pc=0x12238ac
gvisor.dev/gvisor/pkg/sentry/vfs.(*FilesystemRefs).DecRef(0xc000993790, 0xc0008177a0)
	bazel-out/k8-fastbuild-ST-3dcbe13c9b87/bin/pkg/sentry/vfs/filesystem_refs.go:126 +0x13f fp=0xc000817790 sp=0xc000817730 pc=0x17f1c1f
gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef(0xc000993790, {0x7295b8, 0xc00098f500})
	pkg/sentry/vfs/filesystem.go:77 +0x7a fp=0xc0008177d0 sp=0xc000817790 pc=0x17f0f7a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc0002e36d8, {0x7295b8, 0xc00098f500})
	pkg/sentry/vfs/vfs.go:1030 +0x24d fp=0xc0008178a8 sp=0xc0008177d0 pc=0x18209ed
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy.func1()
	pkg/sentry/vfs/mount.go:826 +0x50 fp=0xc0008178e8 sp=0xc0008178a8 pc=0x18000d0
runtime.deferreturn()
	GOROOT/src/runtime/panic.go:477 +0x31 fp=0xc000817920 sp=0xc0008178e8 pc=0x12229f1
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy(0xc000b0ce70, {0x7295b8, 0xc00098f500})
	pkg/sentry/vfs/mount.go:839 +0x58d fp=0xc000817a60 sp=0xc000817920 pc=0x17fffed
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).DecRef(0xc000b0ce70, {0x7295b8, 0xc00098f500})
	pkg/sentry/vfs/mount.go:820 +0xca fp=0xc000817a90 sp=0xc000817a60 pc=0x17ffa2a
gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc000b0ce70?, 0xc000c09000?}, {0x7295b8, 0xc00098f500})
	pkg/sentry/vfs/vfs.go:1086 +0x6f fp=0xc000817ac8 sp=0xc000817a90 pc=0x1820baf
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualDentry).DecRef(0xc0005a6dc0, {0x7295b8, 0xc00098f500})
	<autogenerated>:1 +0x65 fp=0xc000817af8 sp=0xc000817ac8 pc=0x1839cc5
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc0002e36d8, {0x7295b8, 0xc00098f500})
	pkg/sentry/vfs/vfs.go:1030 +0x24d fp=0xc000817bd0 sp=0xc000817af8 pc=0x18209ed
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).Destroy(0xc000866e10, {0x7295b8, 0xc00098f500})
	pkg/sentry/vfs/namespace.go:201 +0x111 fp=0xc000817c28 sp=0xc000817bd0 pc=0x180ab31
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef.func1()
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x84 fp=0xc000817c68 sp=0xc000817c28 pc=0x1918384
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).DecRef(0xc0006fa3e0, 0xc000817ce0)
	bazel-out/k8-fastbuild-ST-3dcbe13c9b87/bin/pkg/sentry/fsimpl/nsfs/inode_refs.go:132 +0xaf fp=0xc000817cc8 sp=0xc000817c68 pc=0x1917caf
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*Inode).DecRef(0xc0006fa380, {0x7295b8, 0xc00098f500})
	pkg/sentry/fsimpl/nsfs/nsfs.go:96 +0x91 fp=0xc000817d10 sp=0xc000817cc8 pc=0x19182b1
gvisor.dev/gvisor/pkg/sentry/vfs.(*MountNamespace).DecRef(0xc000866e10, {0x7295b8, 0xc00098f500})
	pkg/sentry/vfs/namespace.go:216 +0x64 fp=0xc000817d38 sp=0xc000817d10 pc=0x180acc4
gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc00098f500, 0xc00098f500)
	pkg/sentry/kernel/task_exit.go:297 +0xa06 fp=0xc000817e60 sp=0xc000817d38 pc=0x1bd9126
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00098f500, 0x13)
	pkg/sentry/kernel/task_run.go:98 +0x36a fp=0xc000817fb0 sp=0xc000817e60 pc=0x1bed0aa
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:391 +0x45 fp=0xc000817fe0 sp=0xc000817fb0 pc=0x1c031a5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc000817fe8 sp=0xc000817fe0 pc=0x125c8c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 313
	pkg/sentry/kernel/task_start.go:391 +0x1ce