panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x6e6eef]

goroutine 1604282 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Credentials(0x0, 0x0)
	pkg/sentry/kernel/task_identity.go:27 +0x2f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync.(*FileAsync).Callback(0xc4207e4e00, 0xc4207e4e08)
	pkg/sentry/kernel/fasync/fasync.go:60 +0x6f
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc420f1a820, 0xffffffffffff0004)
	pkg/waiter/waiter.go:190 +0x9c
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*Reader).Release(0xc42000cb30)
	pkg/sentry/kernel/pipe/reader.go:33 +0x48
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef.func1()
	pkg/sentry/fs/file.go:125 +0x79
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc4216357a0, 0xc4217bfd58)
	pkg/refs/refcounter.go:297 +0x121
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc4216357a0)
	pkg/sentry/fs/file.go:119 +0x48
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*FDMap).RemoveIf(0xc42026b020, 0xbcdbe0)
	pkg/sentry/kernel/fd_map.go:362 +0x24e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*FDMap).destroy(0xc42026b020)
	pkg/sentry/kernel/fd_map.go:110 +0x37
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*FDMap).(gvisor.googlesource.com/gvisor/pkg/sentry/kernel.destroy)-fm()
	pkg/sentry/kernel/fd_map.go:117 +0x2a
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc42026b020, 0xc4217bfef8)
	pkg/refs/refcounter.go:297 +0x121
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*FDMap).DecRef(0xc42026b020)
	pkg/sentry/kernel/fd_map.go:117 +0x48
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*TaskResources).release(0xc420c64b68)
	pkg/sentry/kernel/task_resources.go:56 +0x33
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0x0, 0xc420c64400, 0xc5bc00, 0x0)
	pkg/sentry/kernel/task_exit.go:267 +0xda
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420c64400, 0x1993)
	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