syzbot

panic: registering already registered file

goroutine 885 gp=0xc000821a40 m=14 mp=0xc000898008 [running]:
panic({0x11c1240?, 0x1652070?})
	GOROOT/src/runtime/panic.go:811 +0x168 fp=0xc0008d9710 sp=0xc0008d9660 pc=0x4788c8
gvisor.dev/gvisor/pkg/sentry/kernel/fasync.(*FileAsync).Register(0xc00101c9a0, {0x166a170, 0xc000fcc300})
	pkg/sentry/kernel/fasync/fasync.go:154 +0x125 fp=0xc0008d9768 sp=0xc0008d9710 pc=0xae5d25
gvisor.dev/gvisor/pkg/sentry/vfs.FileDescriptionDefaultImpl.RegisterFileAsyncHandler(...)
	pkg/sentry/vfs/file_description_impl_util.go:178
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).RegisterFileAsyncHandler(0x5bd000?, 0x5be000?)
	<autogenerated>:1 +0x31 fp=0xc0008d9790 sp=0xc0008d9768 pc=0xf6ab71
gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).SetStatusFlags(0xc000fcc300, {0x167cf30?, 0xc0008fcc88?}, 0xc0008db1a0, 0xa002)
	pkg/sentry/vfs/file_description.go:291 +0x38c fp=0xc0008d99a0 sp=0xc0008d9790 pc=0x80770c
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Ioctl(0xc0008fcc88, 0x10, {{0x3}, {0x5452}, {0x200000000040}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:251 +0x6ea fp=0xc0008d9a78 sp=0xc0008d99a0 pc=0xc1eaca
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0008fcc88, 0x10, {{0x3}, {0x5452}, {0x200000000040}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x655 fp=0xc0008d9ca8 sp=0xc0008d9a78 pc=0xaa0a95
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0008fcc88, 0x10, {{0x3}, {0x5452}, {0x200000000040}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc0008d9d00 sp=0xc0008d9ca8 pc=0xaa1be5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0008fcc88, 0x10, {{0x3}, {0x5452}, {0x200000000040}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc0008d9d50 sp=0xc0008d9d00 pc=0xaa1905
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00048c210?)
	pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc0008d9e28 sp=0xc0008d9d50 pc=0xaa1685
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0009a41b0?, 0xc0008fcc88)
	pkg/sentry/kernel/task_run.go:269 +0xebc fp=0xc0008d9f30 sp=0xc0008d9e28 pc=0xa9745c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0008fcc88, 0x56)
	pkg/sentry/kernel/task_run.go:97 +0x214 fp=0xc0008d9fc0 sp=0xc0008d9f30 pc=0xa95f34
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc0008d9fe0 sp=0xc0008d9fc0 pc=0xa9f4e5
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc0008d9fe8 sp=0xc0008d9fe0 pc=0x4816e1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 852
	pkg/sentry/kernel/task_start.go:416 +0xc5