panic: invalid allocation length: 0x0

goroutine 259593 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/filemem.(*FileMem).Allocate(0xc4202a8000, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/platform/filemem/filemem.go:250 +0x6bb
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Registry).newShm(0xc4204ab530, 0xc817c0, 0xc420d41b00, 0x827, 0x0, 0x0, 0x0, 0x0, 0x40000002, 0xc420f25ae0, ...)
	pkg/sentry/kernel/shm/shm.go:201 +0xc0
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Registry).FindOrCreate(0xc4204ab530, 0xc817c0, 0xc420d41b00, 0x827, 0x0, 0x0, 0xc420000001, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/shm/shm.go:190 +0x227
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Shmget(0xc420d41b00, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x428854, 0xbe99d0, 0xc420f25c20, ...)
	pkg/sentry/syscalls/linux/sys_shm.go:38 +0x103
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc420d41b00, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0xc4202aa3a0, 0xbc09c0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc420d41b00, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:278 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc420d41b00, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0xc748a0, 0xc420f25e18)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420d41b00, 0x2, 0xc420372d80)
	pkg/sentry/kernel/task_syscall.go:216 +0x10c
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420d41b00, 0xc748a0, 0x0)
	pkg/sentry/kernel/task_run.go:217 +0xe56
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420d41b00, 0x212f)
	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