panic: ptrace set fpregs (ADDR) failed: no such process

panic: ptrace set fpregs (0xc000dd9300) failed: no such process

goroutine 29103 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).switchToApp(0xc000636780, 0xc00061e780, 0xd2c720, 0xc00061d560, 0xc000ce9e00)
	pkg/sentry/platform/ptrace/subprocess.go:486 +0x9e7
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*context).Switch(0xc00061e780, 0xd1e340, 0xc000636780, 0xd2c720, 0xc00061d560, 0x7f57ffffffff, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/platform/ptrace/ptrace.go:102 +0x74
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000489500, 0xd119c0, 0x0)
	pkg/sentry/kernel/task_run.go:205 +0x348
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc000489500, 0x108)
	pkg/sentry/kernel/task_run.go:91 +0x149
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:279 +0xfe

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2018/12/13 10:24	https://gvisor.googlesource.com/gvisor master	f484b6d4c2f1	f3d9d594	.config	console log	report					ci-gvisor-ptrace-direct-overlay-host
2018/12/13 10:07	https://gvisor.googlesource.com/gvisor master	f484b6d4c2f1	f3d9d594	.config	console log	report					ci-gvisor-kvm-direct-overlay-host-race