panic: invalid allocation length: 0x0

goroutine 6296101 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/filemem.(*FileMem).Allocate(0xc42029a000, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/platform/filemem/filemem.go:252 +0x815
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Registry).newShm(0xc4204b8870, 0x10cb800, 0xc4207d0d00, 0x27ee, 0x0, 0x0, 0x0, 0x0, 0xc4207d1428, 0xc4ffffffff, ...)
	pkg/sentry/kernel/shm/shm.go:203 +0xd1
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/shm.(*Registry).FindOrCreate(0xc4204b8870, 0x10cb800, 0xc4207d0d00, 0x27ee, 0x0, 0x0, 0xc420000001, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/shm/shm.go:192 +0x2b0
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Shmget(0xc4207d0d00, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x47c9be, 0xc420ae1a88, 0x42f404, ...)
	pkg/sentry/syscalls/linux/sys_shm.go:38 +0x14a
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4207d0d00, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4207d0d00, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0x0, 0x46155c)
	pkg/sentry/kernel/task_syscall.go:280 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4207d0d00, 0x1d, 0x0, 0x0, 0x0, 0x20b39000, 0x0, 0x0, 0xc421b41660, 0xc420ae1c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4207d0d00, 0x2, 0xc4202a6b40)
	pkg/sentry/kernel/task_syscall.go:216 +0x19f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4207d0d00, 0x10bc5a0, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4207d0d00, 0x9e2a)
	pkg/sentry/kernel/task_run.go:95 +0x265
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:258 +0x194