panic: running on goroutine 249 (task goroutine for kernel.Task 0xc0001d0588 is 0)

goroutine 249 gp=0xc00048c540 m=9 mp=0xc000180708 [running]:
panic({0x1af4ae0?, 0xc0007962b0?})
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc0008b55d0 sp=0xc0008b5520 pc=0x478628
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).assertTaskGoroutine(0xc0001d0588)
	pkg/sentry/kernel/task_run.go:368 +0x13c fp=0xc0008b5650 sp=0xc0008b55d0 pc=0xf3a2dc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Value(0xc0001d0588, {0x1af63a0, 0x1f741b8})
	pkg/sentry/kernel/task_context.go:59 +0x31 fp=0xc0008b5690 sp=0xc0008b5650 pc=0xf1ca11
gvisor.dev/gvisor/pkg/sentry/kernel.KernelFromContext(...)
	pkg/sentry/kernel/context.go:55
gvisor.dev/gvisor/pkg/sentry/fsimpl/cgroupfs.(*filesystem).Release(0xc000a9c000, {0x1fa1ec0, 0xc0001d0588})
	pkg/sentry/fsimpl/cgroupfs/cgroupfs.go:468 +0x4c fp=0xc0008b56e8 sp=0xc0008b5690 pc=0x1612acc
gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef.func1()
	pkg/sentry/vfs/filesystem.go:81 +0x109 fp=0xc0008b5740 sp=0xc0008b56e8 pc=0xac65e9
gvisor.dev/gvisor/pkg/sentry/vfs.(*FilesystemRefs).DecRef(0xc000a9c000, 0xc0008b57d8)
	bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/filesystem_refs.go:133 +0x6d fp=0xc0008b57c8 sp=0xc0008b5740 pc=0xac6ead
gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef(0xc000a9c000, {0x1fa1ec0, 0xc0001d0588})
	pkg/sentry/vfs/filesystem.go:77 +0x94 fp=0xc0008b5808 sp=0xc0008b57c8 pc=0xac6494
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc0002871e0, {0x1fa1ec0, 0xc0001d0588})
	pkg/sentry/vfs/vfs.go:1050 +0x23e fp=0xc0008b58d0 sp=0xc0008b5808 pc=0xaf525e
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy.deferwrap1()
	pkg/sentry/vfs/mount.go:949 +0x50 fp=0xc0008b5910 sp=0xc0008b58d0 pc=0xad52b0
runtime.deferreturn()
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:605 +0x5e fp=0xc0008b59a0 sp=0xc0008b5910 pc=0x43b97e
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy(0xc000a102c0, {0x1fa1ec0, 0xc0001d0588})
	pkg/sentry/vfs/mount.go:979 +0x752 fp=0xc0008b5b00 sp=0xc0008b59a0 pc=0xad51d2
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).DecRef(0xc000a102c0, {0x1fa1ec0, 0xc0001d0588})
	pkg/sentry/vfs/mount.go:943 +0x79 fp=0xc0008b5b28 sp=0xc0008b5b00 pc=0xad4a39
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).processDeferredDecRefs.deferwrap1()
	pkg/sentry/fsimpl/kernfs/kernfs.go:182 +0x62 fp=0xc0008b5b70 sp=0xc0008b5b28 pc=0xc18d02
runtime.deferreturn()
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:605 +0x5e fp=0xc0008b5c00 sp=0xc0008b5b70 pc=0x43b97e
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).processDeferredDecRefs(0xc000000780, {0x1fa1ec0, 0xc0001d0588})
	pkg/sentry/fsimpl/kernfs/kernfs.go:186 +0x1cb fp=0xc0008b5c60 sp=0xc0008b5c00 pc=0xc18c6b
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).Invalidate.deferwrap1()
	pkg/sentry/fsimpl/kernfs/kernfs.go:323 +0x50 fp=0xc0008b5ca0 sp=0xc0008b5c60 pc=0xc19690
runtime.deferreturn()
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:605 +0x5e fp=0xc0008b5d30 sp=0xc0008b5ca0 pc=0x43b97e
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).Invalidate(0xc000a96000, {0x1fa1ec0, 0xc0001d0588})
	pkg/sentry/fsimpl/kernfs/kernfs.go:339 +0x3c5 fp=0xc0008b5e48 sp=0xc0008b5d30 pc=0xc19565
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*taskInode).TaskDestroyAction(0xc00056d408, {0x1fa1ec0, 0xc0001d0588})
	pkg/sentry/fsimpl/proc/task.go:130 +0x172 fp=0xc0008b5ef0 sp=0xc0008b5e48 pc=0x1309d32
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).execOnDestroyActions.func1()
	pkg/sentry/kernel/task_exit.go:807 +0x168 fp=0xc0008b5fe0 sp=0xc0008b5ef0 pc=0xf269c8
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc0008b5fe8 sp=0xc0008b5fe0 pc=0x4819a1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).execOnDestroyActions in goroutine 129
	pkg/sentry/kernel/task_exit.go:804 +0x1dd