panic: Decrementing non-positive ref count goroutine 12744577 [running]: gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc422408480, 0xc4227b3ac0) pkg/refs/refcounter.go:271 +0x162 gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Shm).DecRef(0xc422408480) pkg/sentry/kernel/shm/shm.go:359 +0x48 gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Shm).MarkDestroyed(0xc422408480) pkg/sentry/kernel/shm/shm.go:578 +0x7c gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Shmctl(0xc421e64d00, 0x189, 0x0, 0x0, 0x0, 0x0, 0x0, 0x202, 0xc4227b3c10, 0x428854, ...) pkg/sentry/syscalls/linux/sys_shm.go:143 +0x323 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc421e64d00, 0x1f, 0x189, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xba7ee0, ...) pkg/sentry/kernel/task_syscall.go:162 +0x307 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc421e64d00, 0x1f, 0x189, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) pkg/sentry/kernel/task_syscall.go:280 +0x62 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc421e64d00, 0x1f, 0x189, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc5bbc0, 0x0) pkg/sentry/kernel/task_syscall.go:241 +0x91 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc421e64d00, 0x2, 0xc4226a2360) pkg/sentry/kernel/task_syscall.go:216 +0x142 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc421e64d00, 0xc5bbc0, 0x0) pkg/sentry/kernel/task_run.go:219 +0xe56 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc421e64d00, 0xc569) 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