panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x17689d3]

goroutine 463483 [running]:
panic({0x305940?, 0x25d0c60?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc0014f8678 sp=0xc0014f85c8 pc=0x11ad0ec
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc0014f86d8 sp=0xc0014f8678 pc=0x11c60f8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x0)
	pkg/sentry/vfs/mount.go:693 +0x33 fp=0xc0014f86f8 sp=0xc0014f86d8 pc=0x17689d3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc000477360, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x385 fp=0xc0014f8808 sp=0xc0014f86f8 pc=0x1770d45
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc000476aa0, 0xc007368320)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f8918 sp=0xc0014f8808 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc003a93360, 0xc007368280)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f8a28 sp=0xc0014f8918 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab54a0, 0xc0073681e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f8b38 sp=0xc0014f8a28 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5680, 0xc007368140)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f8c48 sp=0xc0014f8b38 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab55e0, 0xc0073680a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f8d58 sp=0xc0014f8c48 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab57c0, 0xc000477f40)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f8e68 sp=0xc0014f8d58 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab59a0, 0xc000477ea0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f8f78 sp=0xc0014f8e68 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5b80, 0xc000477e00)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9088 sp=0xc0014f8f78 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5cc0, 0xc000477cc0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9198 sp=0xc0014f9088 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5c20, 0xc000477d60)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f92a8 sp=0xc0014f9198 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5ea0, 0xc000477c20)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f93b8 sp=0xc0014f92a8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc0044fa000, 0xc000477b80)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f94c8 sp=0xc0014f93b8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5e00, 0xc000477ae0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f95d8 sp=0xc0014f94c8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5d60, 0xc000477a40)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f96e8 sp=0xc0014f95d8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5ae0, 0xc0004779a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f97f8 sp=0xc0014f96e8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5a40, 0xc000477900)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9908 sp=0xc0014f97f8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5900, 0xc000477860)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9a18 sp=0xc0014f9908 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5860, 0xc0004777c0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9b28 sp=0xc0014f9a18 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5720, 0xc000477720)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9c38 sp=0xc0014f9b28 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5540, 0xc000477680)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9d48 sp=0xc0014f9c38 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5400, 0xc0004775e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9e58 sp=0xc0014f9d48 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5360, 0xc0001a1220)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014f9f68 sp=0xc0014f9e58 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab52c0, 0xc0001a10e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa078 sp=0xc0014f9f68 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc002ab5220, 0xc0001a0500)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa188 sp=0xc0014fa078 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc003d8ad20, 0xc0001a03c0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa298 sp=0xc0014fa188 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc003d8abe0, 0xc0001a0320)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa3a8 sp=0xc0014fa298 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc003d8ab40, 0xc0001a01e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa4b8 sp=0xc0014fa3a8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc003d8aaa0, 0xc0000399a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa5c8 sp=0xc0014fa4b8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc003d8aa00, 0xc000039900)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa6d8 sp=0xc0014fa5c8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc0028e35e0, 0xc000039860)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa7e8 sp=0xc0014fa6d8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc0028e3540, 0xc0000397c0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fa8f8 sp=0xc0014fa7e8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc0028e34a0, 0xc000039720)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014faa08 sp=0xc0014fa8f8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc003a934a0, 0xc000039680)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fab18 sp=0xc0014faa08 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc003a93400, 0xc0000395e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fac28 sp=0xc0014fab18 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc0069bb110, 0xc0069bb120, 0xc0004768c0, 0xc000039540)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0014fad38 sp=0xc0014fac28 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc0007821e0, {0x6fec98, 0xc0068f9500}, 0xc00054d260, 0xc000daed50, 0x1?, 0x117be34?, {0x6e27c0, 0xc000782000})
	pkg/sentry/vfs/namespace.go:186 +0x4e8 fp=0xc0014fae80 sp=0xc0014fad38 pc=0x17713a8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc0068f9500, 0xc0014fb440)
	pkg/sentry/kernel/task_clone.go:205 +0x1b05 fp=0xc0014fb3e8 sp=0xc0014fae80 pc=0x1ab8b65
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone3(0xc000625540?, 0x11e072e?, {{0x7f93c34a4fb0}, {0x4a}, {0x7f93c34a4fb0}, {0x0}, {0x0}, {0x4a}})
	pkg/sentry/syscalls/linux/sys_thread.go:252 +0x13d fp=0xc0014fb4d0 sp=0xc0014fb3e8 pc=0x1d5c63d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0068f9500, 0x1b3, {{0x7f93c34a4fb0}, {0x4a}, {0x7f93c34a4fb0}, {0x0}, {0x0}, {0x4a}})
	pkg/sentry/kernel/task_syscall.go:142 +0xaff fp=0xc0014fb908 sp=0xc0014fb4d0 pc=0x1af213f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0068f9500, 0x1?, {{0x7f93c34a4fb0}, {0x4a}, {0x7f93c34a4fb0}, {0x0}, {0x0}, {0x4a}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc0014fb9c0 sp=0xc0014fb908 pc=0x1af41fd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000d2c5a0?, 0x11e9329?, {{0x7f93c34a4fb0}, {0x4a}, {0x7f93c34a4fb0}, {0x0}, {0x0}, {0x4a}})
	pkg/sentry/kernel/task_syscall.go:282 +0xbd fp=0xc0014fba38 sp=0xc0014fb9c0 pc=0x1af3afd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0068f9500)
	pkg/sentry/kernel/task_syscall.go:257 +0x55b fp=0xc0014fbb70 sp=0xc0014fba38 pc=0x1af365b
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0068f9500?, 0xc0068f9500)
	pkg/sentry/kernel/task_run.go:269 +0x2387 fp=0xc0014fbe60 sp=0xc0014fbb70 pc=0x1adc487
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0068f9500, 0x2938)
	pkg/sentry/kernel/task_run.go:98 +0x36a fp=0xc0014fbfb0 sp=0xc0014fbe60 pc=0x1ad97ea
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x45 fp=0xc0014fbfe0 sp=0xc0014fbfb0 pc=0x1aef9a5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc0014fbfe8 sp=0xc0014fbfe0 pc=0x11e6101
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 462200
	pkg/sentry/kernel/task_start.go:395 +0x1ce