panic: Decrementing non-positive ref count

goroutine 5146 [running]:
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc4201d6480, 0xc420592ac0)
	pkg/refs/refcounter.go:271 +0x162
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Shm).DecRef(0xc4201d6480)
	pkg/sentry/kernel/shm/shm.go:377 +0x48
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Shm).MarkDestroyed(0xc4201d6480)
	pkg/sentry/kernel/shm/shm.go:596 +0x7c
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Shmctl(0xc4205dbb00, 0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x202, 0xc420592c10, 0x428854, ...)
	pkg/sentry/syscalls/linux/sys_shm.go:143 +0x323
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4205dbb00, 0x1f, 0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xba3160, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4205dbb00, 0x1f, 0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4205dbb00, 0x1f, 0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc562e0, 0x0)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4205dbb00, 0x2, 0xc4205046c0)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4205dbb00, 0xc562e0, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xe56
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4205dbb00, 0x48)
	pkg/sentry/kernel/task_run.go:95 +0x174
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:258 +0x100