panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0xa8 pc=0xf2a6d7]

goroutine 1816405 [running]:
panic(0x115cb00, 0x1d2e3c0)
	GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc00089d2d0 sp=0xc00089d208 pc=0x437c65
runtime.panicmem()
	GOROOT/src/runtime/panic.go:212 +0x5b fp=0xc00089d2f0 sp=0xc00089d2d0 pc=0x435cbb
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:734 +0x173 fp=0xc00089d328 sp=0xc00089d2f0 pc=0x44fa93
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).callFuture(0xc004d92d20, 0xc015dd4a80, 0xc006f144e0, 0x0, 0x0, 0x0)
	pkg/sentry/fsimpl/fuse/connection.go:287 +0x97 fp=0xc00089d3a0 sp=0xc00089d328 pc=0xf2a6d7
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*connection).Call(0xc004d92d20, 0xc015dd4a80, 0xc006f144e0, 0x1, 0xc000000001, 0x14bd8a8)
	pkg/sentry/fsimpl/fuse/connection.go:262 +0x65 fp=0xc00089d3e0 sp=0xc00089d3a0 pc=0xf2a4e5
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*inode).newEntry(0xc01c6cd400, 0x14c1818, 0xc015dd4a80, 0xc00583cf08, 0x5, 0x1ffff0000, 0x14bd8a8, 0xc003ffd850, 0x40, 0x0, ...)
	pkg/sentry/fsimpl/fuse/fusefs.go:602 +0x17b fp=0xc00089d4f8 sp=0xc00089d3e0 pc=0xf31e1b
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*inode).Lookup(0xc01c6cd400, 0x14c1818, 0xc015dd4a80, 0xc00583cf08, 0x5, 0xa673eec3db946674, 0xc00089d5d8, 0x76547f, 0xc00089d5c8)
	pkg/sentry/fsimpl/fuse/fusefs.go:493 +0xa9 fp=0xc00089d568 sp=0xc00089d4f8 pc=0xf30ee9
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0xc0157b7d40, 0x14c1818, 0xc015dd4a80, 0xc000315080, 0xc01c8faa20, 0xc00583cf08, 0x5, 0x0, 0xc000315088, 0xc00089d668, ...)
	pkg/sentry/fsimpl/kernfs/filesystem.go:134 +0xa5 fp=0xc00089d5e0 sp=0xc00089d568 pc=0x8584e5
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc0157b7d40, 0x14c1818, 0xc015dd4a80, 0xc013c44000, 0xc01c8faa20, 0xc0157b7d01, 0x8ff500, 0x1, 0x0)
	pkg/sentry/fsimpl/kernfs/filesystem.go:76 +0x1da fp=0xc00089d6a0 sp=0xc00089d5e0 pc=0x857e5a
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc0157b7d40, 0x14c1818, 0xc015dd4a80, 0xc013c44000, 0x8fffe5, 0xc00030cd90, 0xc015dd4a80)
	pkg/sentry/fsimpl/kernfs/filesystem.go:166 +0x85 fp=0xc00089d6f8 sp=0xc00089d6a0 pc=0x8587a5
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).GetDentryAt(0xc0157b7d40, 0x14c1818, 0xc015dd4a80, 0xc013c44000, 0x1d7ce00, 0x0, 0x0, 0x0)
	pkg/sentry/fsimpl/kernfs/filesystem.go:313 +0xd3 fp=0xc00089d780 sp=0xc00089d6f8 pc=0x8593d3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0xc000315080, 0x14c1818, 0xc015dd4a80, 0xc0002bb4a0, 0xc00089da48, 0xc00089d875, 0x8d0100, 0x40, 0x0, 0x0)
	pkg/sentry/vfs/vfs.go:221 +0xa3 fp=0xc00089d7f8 sp=0xc00089d780 pc=0x76a5a3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc000315080, 0x14c1818, 0xc015dd4a80, 0xc0002bb4a0, 0xc00089da48, 0xc00089da2c, 0x0, 0x0)
	pkg/sentry/vfs/mount.go:297 +0xf6 fp=0xc00089d990 sp=0xc00089d7f8 pc=0x760b16
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Umount2(0xc015dd4a80, 0x20000240, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/vfs2/mount.go:149 +0x355 fp=0xc00089db10 sp=0xc00089d990 pc=0xe69ad5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc015dd4a80, 0xa6, 0x20000240, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1318be0, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x13c fp=0xc00089dc70 sp=0xc00089db10 pc=0x9f19dc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc015dd4a80, 0xa6, 0x20000240, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc00089dcf8 sp=0xc00089dc70 pc=0x9f2b86
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc015dd4a80, 0xa6, 0x20000240, 0x0, 0x0, 0x0, 0x0, 0x0, 0x14d2a28, 0xc008f80360)
	pkg/sentry/kernel/task_syscall.go:198 +0x98 fp=0xc00089dd58 sp=0xc00089dcf8 pc=0x9f2778
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc015dd4a80, 0x2, 0xc015dd4a80)
	pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc00089de28 sp=0xc00089dd58 pc=0x9f211c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc015dd4a80, 0x1493a00, 0x0)
	pkg/sentry/kernel/task_run.go:254 +0xc27 fp=0xc00089df68 sp=0xc00089de28 pc=0x9e6ea7
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc015dd4a80, 0x6ec0)
	pkg/sentry/kernel/task_run.go:95 +0x182 fp=0xc00089dfd0 sp=0xc00089df68 pc=0x9e5de2
runtime.goexit()
	src/runtime/asm_amd64.s:1371 +0x1 fp=0xc00089dfd8 sp=0xc00089dfd0 pc=0x472861
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:342 +0xfe