panic: invalid allocation length: 0x0

goroutine 5605197 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/filemem.(*FileMem).Allocate(0xc420274000, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/platform/filemem/filemem.go:252 +0x6bb
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Registry).newShm(0xc420a30b40, 0xc68dc0, 0xc423c66900, 0x1465, 0x0, 0x0, 0x0, 0x0, 0xc9bb8a39, 0xc4206adad0, ...)
	pkg/sentry/kernel/shm/shm.go:185 +0xc0
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Registry).FindOrCreate(0xc420a30b40, 0xc68dc0, 0xc423c66900, 0x1465, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/shm/shm.go:174 +0x259
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Shmget(0xc423c66900, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x202, 0xc4206adc10, 0x428854, ...)
	pkg/sentry/syscalls/linux/sys_shm.go:38 +0x103
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc423c66900, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x0, 0xba7ee0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc423c66900, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc423c66900, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0xc5bbc0, 0x0)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc423c66900, 0x2, 0xc4202e0d80)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc423c66900, 0xc5bbc0, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xe56
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc423c66900, 0x5470)
	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