panic: Incrementing non-positive count 0xc000fbc588 on tmpfs.inode

goroutine 960549 [running]:
panic({0x1614fa0, 0xc006e8fd00})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc000706ee8 sp=0xc000706e28 pc=0x438397
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).IncRef(0xc000fbc588)
	bazel-out/k8-fastbuild-ST-3dcbe13c9b87/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:80 +0x119 fp=0xc000706f50 sp=0xc000706ee8 pc=0xad0a79
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inode).incRef(...)
	pkg/sentry/fsimpl/tmpfs/tmpfs.go:520
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*dentry).IncRef(...)
	pkg/sentry/fsimpl/tmpfs/tmpfs.go:377
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).GetDentryAt(0xc0003940c0, {0x1b0c790, 0xc001e80000}, 0xc005f16900, {0x60?})
	pkg/sentry/fsimpl/tmpfs/filesystem.go:258 +0x1c5 fp=0xc000707018 sp=0xc000706f50 pc=0xac6765
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0x7?, {0x1b0c790, 0xc001e80000}, 0x39?, 0x1c73b5f722436?, 0xc0007070f9)
	pkg/sentry/vfs/vfs.go:229 +0x10e fp=0xc0007070b0 sp=0xc000707018 pc=0x94dcee
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc0003cb3d0, {0x1b0c790, 0xc001e80000}, 0xc00995e2a0, 0xc00a5c0200?, 0xc000707390)
	pkg/sentry/vfs/mount.go:643 +0x169 fp=0xc000707308 sp=0xc0007070b0 pc=0x93cf69
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Umount2(0xc001e80000, {{0x20000100}, {0x2}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_mount.go:171 +0x3da fp=0xc000707508 sp=0xc000707308 pc=0xe24c3a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001e80000, 0xa6, {{0x20000100}, {0x2}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9b8 fp=0xc000707a18 sp=0xc000707508 pc=0xc3b038
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001e80000, 0x0?, {{0x20000100}, {0x2}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc000707ab0 sp=0xc000707a18 pc=0xc3cd9d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc007d35860?, 0xc00082b950?, {{0x20000100}, {0x2}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f fp=0xc000707b28 sp=0xc000707ab0 pc=0xc3c78f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc001e80000)
	pkg/sentry/kernel/task_syscall.go:257 +0x496 fp=0xc000707c50 sp=0xc000707b28 pc=0xc3c336
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc001e80000?, 0xc001e80000)
	pkg/sentry/kernel/task_run.go:253 +0x18f9 fp=0xc000707ec0 sp=0xc000707c50 pc=0xc27979
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001e80000, 0x89d8)
	pkg/sentry/kernel/task_run.go:94 +0x354 fp=0xc000707fb0 sp=0xc000707ec0 pc=0xc25714
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:378 +0x48 fp=0xc000707fe0 sp=0xc000707fb0 pc=0xc38c28
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc000707fe8 sp=0xc000707fe0 pc=0x46e1c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:378 +0x1a8