panic: Incrementing non-positive ref count 0xc000b48640 owned by *mm.SpecialMappable goroutine 1572 [running]: panic(0x100aa40, 0xc0006b4da0) GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc000cb3420 sp=0xc000cb3368 pc=0x43438d gvisor.dev/gvisor/pkg/sentry/mm.(*SpecialMappableRefs).IncRef(0xc000b48640) bazel-out/k8-fastbuild/bin/pkg/sentry/mm/special_mappable_refs.go:83 +0xe0 fp=0xc000cb3488 sp=0xc000cb3420 pc=0x7dbf20 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).Fork(0xc00064e000, 0x1400960, 0xc00086b500, 0x0, 0x0, 0x0) pkg/sentry/mm/lifecycle.go:133 +0x6e5 fp=0xc000cb37d8 sp=0xc000cb3488 pc=0x7c32e5 gvisor.dev/gvisor/pkg/sentry/kernel.(*TaskContext).Fork(0xc00086bcb8, 0x1400960, 0xc00086b500, 0xc00023e500, 0xc000b50300, 0x0, 0x0, 0xc00086be3c) pkg/sentry/kernel/task_context.go:101 +0x1ca fp=0xc000cb3840 sp=0xc000cb37d8 pc=0x955fda gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc00086b500, 0xc000cb3ae0, 0xc000000000, 0x0, 0x0, 0x0) pkg/sentry/kernel/task_clone.go:247 +0x322 fp=0xc000cb3ab0 sp=0xc000cb3840 pc=0x9531c2 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0xc00086b500, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0xc000cb3bc8, 0x47bc71, 0x3c00, 0xc000cb3bc4) pkg/sentry/syscalls/linux/sys_thread.go:270 +0x165 fp=0xc000cb3b48 sp=0xc000cb3ab0 pc=0xa05e45 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc00086b500, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0x0, 0xc000cb3c14, 0xdcdc98, 0x65, ...) pkg/sentry/syscalls/linux/sys_clone_amd64.go:37 +0xa3 fp=0xc000cb3ba8 sp=0xc000cb3b48 pc=0x9ce9e3 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00086b500, 0x38, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0x0, 0x0, 0x11f0160, ...) pkg/sentry/kernel/task_syscall.go:117 +0x1b6 fp=0xc000cb3c68 sp=0xc000cb3ba8 pc=0x970886 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00086b500, 0x38, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0x0, 0x169c940, 0x0) pkg/sentry/kernel/task_syscall.go:292 +0x70 fp=0xc000cb3cf0 sp=0xc000cb3c68 pc=0x971b70 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00086b500, 0x38, 0x1200011, 0x0, 0x0, 0x169cc10, 0x169c940, 0x0, 0x13ce401, 0x100000000000000) pkg/sentry/kernel/task_syscall.go:239 +0xb4 fp=0xc000cb3d50 sp=0xc000cb3cf0 pc=0x971624 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00086b500, 0x2, 0xc00086b500) pkg/sentry/kernel/task_syscall.go:206 +0x198 fp=0xc000cb3e10 sp=0xc000cb3d50 pc=0x970f08 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00086b500, 0x13ce4c0, 0x0) pkg/sentry/kernel/task_run.go:321 +0xd88 fp=0xc000cb3f60 sp=0xc000cb3e10 pc=0x963eb8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00086b500, 0x22) pkg/sentry/kernel/task_run.go:97 +0x1bd fp=0xc000cb3fd0 sp=0xc000cb3f60 pc=0x9629fd runtime.goexit() src/runtime/asm_amd64.s:1373 +0x1 fp=0xc000cb3fd8 sp=0xc000cb3fd0 pc=0x467da1 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:370 +0x112