panic: WARNING: circular locking detected: kernel.taskSetRWMutex -> kernfs.filesystemRWMutex:
goroutine 15 [running]:
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*filesystemRWMutex).Lock(0xc0006805f0)
	bazel-out/k8-fastbuild-ST-3dcbe13c9b87/bin/pkg/sentry/fsimpl/kernfs/filesystem_mutex.go:31 +0x45
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc000438630, {0x1b0e328, 0xc00043d8c0})
	pkg/sentry/fsimpl/kernfs/kernfs.go:286 +0x79
gvisor.dev/gvisor/pkg/sentry/kernel.(*Cgroup).decRef(0xc0005682d0)
	pkg/sentry/kernel/cgroup.go:121 +0x5c
gvisor.dev/gvisor/pkg/sentry/kernel.(*TaskSet).newTask(0xc0004fc1c0, {0x1b0e7f0, 0xc00074aa80}, 0xc00084f338)
	pkg/sentry/kernel/task_start.go:244 +0x14d1
gvisor.dev/gvisor/pkg/sentry/kernel.(*TaskSet).NewTask(0xc00074aa80?, {0x1b0e7f0, 0xc00074aa80}, 0xc00084f338)
	pkg/sentry/kernel/task_start.go:127 +0xeb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc00074aa80, 0xc00084f418)
	pkg/sentry/kernel/task_clone.go:219 +0x1da5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x471337?, 0x1200011, 0x0, 0x0, 0x5579ff5425d0, 0x0)
	pkg/sentry/syscalls/linux/sys_thread.go:217 +0xfc
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc000965578?, {{0x1200011}, {0x0}, {0x0}, {0x5579ff5425d0}, {0x0}, {0x5579ff542300}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x4e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00074aa80, 0x38, {{0x1200011}, {0x0}, {0x0}, {0x5579ff5425d0}, {0x0}, {0x5579ff542300}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9b8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00074aa80, 0x0?, {{0x1200011}, {0x0}, {0x0}, {0x5579ff5425d0}, {0x0}, {0x5579ff542300}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000636c90?, 0xc0002be410?, {{0x1200011}, {0x0}, {0x0}, {0x5579ff5425d0}, {0x0}, {0x5579ff542300}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00074aa80)
	pkg/sentry/kernel/task_syscall.go:257 +0x496
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00074aa80?, 0xc00074aa80)
	pkg/sentry/kernel/task_run.go:253 +0x18f9
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00074aa80, 0x13)
	pkg/sentry/kernel/task_run.go:94 +0x354
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:380 +0x1a8