panic: invalid allocation length: 0x0

goroutine 899451 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/filemem.(*FileMem).Allocate(0xc000139680, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/platform/filemem/filemem.go:252 +0x6ac
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Registry).newShm(0xc000830630, 0xcac260, 0xc004b97200, 0x443, 0x0, 0x0, 0x0, 0x0, 0xe24867bf, 0xc004f42b40, ...)
	pkg/sentry/kernel/shm/shm.go:185 +0xc0
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Registry).FindOrCreate(0xc000830630, 0xcac260, 0xc004b97200, 0x443, 0x0, 0x0, 0xc006000001, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/shm/shm.go:174 +0x259
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Shmget(0xc004b97200, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0xc004f42c78, 0x6e575a, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_shm.go:38 +0xf8
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc004b97200, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0xc001384600, 0xbcf240, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x30a
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc004b97200, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x69
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc004b97200, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x100030000, 0x0)
	pkg/sentry/kernel/task_syscall.go:241 +0x99
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc004b97200, 0x2, 0xc004b6c900)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc004b97200, 0xc9f160, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xfda
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc004b97200, 0x109e)
	pkg/sentry/kernel/task_run.go:95 +0x163
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:275 +0xfe